Relevant bibliographies by topics / Nanogenerator

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Nanogenerator'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 September 2023

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Journal articles on the topic "Nanogenerator"

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Li, Weiping, Yupeng Zhang, and Chunxu Pan. "Graphene-based Nanogenerator: Experiments, Theories and Applications." MRS Proceedings 1782 (2015): 15–21. http://dx.doi.org/10.1557/opl.2015.677.

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ABSTRACTIn addition to the piezoelectric nanogenerators and triboelectric nanogenerators, recently, the graphene-based nanogenerator has been widely concerned because of its simple assembly, flexibility and high structural stability. There are many interesting effects in graphene applied for nanogenenrators including anion adsorption in electrolyte solution, ion channels in graphene sheets network and the strain (band engineering) effect, etc. In this paper, we focus explicitly on the experimental results, mechanisms and applications of the graphene-based nanogenerator, and introduce our recent research on the graphene-based nanogenerator based on "modulation of the graphene strain-energy band effect". This nanogenerator is expected to have potential applications in active sensors and sustainable power source.
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Mishra, Siju, P. Supraja, Vishnu V. Jaiswal, et al. "Enhanced output of ZnO nanosheet-based piezoelectric nanogenerator with a novel device structure." Engineering Research Express 3, no. 4 (2021): 045022. http://dx.doi.org/10.1088/2631-8695/ac34c3.

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Abstract We report a double-fold enhancement of piezoelectric nanogenerator output voltage with a simple design strategy. The piezoelectric nanogenerator is fabricated with ZnO nanosheets coated on both sides of the aluminum substrate in this new design strategy with necessary electrodes. The cost-effective hydrothermal method is employed to synthesize two-dimensional (2D) ZnO nanosheets on both sides of the aluminum substrate at a low growth temperature of 80 °C for 4 h. The ZnO nanosheets were characterized for their morphology, crystallinity, and photoluminescence property. The performance of nanogenerator fabricated with double-side coated aluminum substrate was compared to single-side coated aluminum substrate. The nanogenerators fabricated only with one side coating produced an output voltage of ∼170 mV. In contrast, the nanogenerators fabricated with double side coating produced an output voltage of ∼285 mV. The nanogenerator with double-side coating produced ∼1.7 times larger output voltage than that of single-side coated one. The enhancement in the output voltage is mainly due to ZnO nanosheet deformation along both sides and the electric field-induced synergetic effect between two front and back sides of piezoelectric nanogenerators. This nanogenerator fabrication technology has the potential to be scaled up for industrial production of piezoelectric energy collecting devices because of its simplicity and high output gain.
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Amangeldinova, Yerkezhan, Dimaral Aben, Xiaoting Ma, et al. "Enhancing Electrical Outputs of Piezoelectric Nanogenerators by Controlling the Dielectric Constant of ZnO/PDMS Composite." Micromachines 12, no. 6 (2021): 630. http://dx.doi.org/10.3390/mi12060630.

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Structural optimizations of the piezoelectric layer in nanogenerators have been predicted to enhance the output performance in terms of the figure of merit. Here, we report the effect of dielectric constant on electrical outputs of piezoelectric nanogenerator using ZnO/PDMS composites with varied ZnO coverages. The dielectric constant of piezoelectric layers was adjusted from 3.37 to 6.75. The electrical output voltage of 9 mV was achieved in the nanogenerator containing the ZnO/PDMS composite with the dielectric constant of 3.46, which is an 11.3-fold enhancement compared to the value of the nanogenerator featuring the composite with high dielectric constants. Significantly, lowering the dielectric constant of the piezoelectric layer improves the electrical output performance of piezoelectric nanogenerators.
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Shao, Yicheng, Maoliang Shen, Yuankai Zhou, Xin Cui, Lijie Li, and Yan Zhang. "Nanogenerator-based self-powered sensors for data collection." Beilstein Journal of Nanotechnology 12 (July 8, 2021): 680–93. http://dx.doi.org/10.3762/bjnano.12.54.

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Self-powered sensors can provide energy and environmental data for applications regarding the Internet of Things, big data, and artificial intelligence. Nanogenerators provide excellent material compatibility, which also leads to a rich variety of nanogenerator-based self-powered sensors. This article reviews the development of nanogenerator-based self-powered sensors for the collection of human physiological data and external environmental data. Nanogenerator-based self-powered sensors can be designed to detect physiological data as wearable and implantable devices. Nanogenerator-based self-powered sensors are a solution for collecting data and expanding data dimensions in a future intelligent society. The future key challenges and potential solutions regarding nanogenerator-based self-powered sensors are discussed.
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Elvira-Hernández, Ernesto A., Omar I. Nava-Galindo, Elisa K. Martínez-Lara, et al. "A Portable Triboelectric Nanogenerator Based on Dehydrated Nopal Powder for Powering Electronic Devices." Sensors 23, no. 9 (2023): 4195. http://dx.doi.org/10.3390/s23094195.

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Triboelectric nanogenerators (TENGs) based on organic materials can harvest green energy to convert it into electrical energy. These nanogenerators could be used for Internet-of-Things (IoT) devices, substituting solid-state chemical batteries that have toxic materials and limited-service time. Herein, we develop a portable triboelectric nanogenerator based on dehydrated nopal powder (NOP-TENG) as novel triboelectric material. In addition, this nanogenerator uses a polyimide film tape adhered to two copper-coated Bakelite plates. The NOP-TENG generates a power density of 2309.98 μW·m−2 with a load resistance of 76.89 MΩ by applying a hand force on its outer surface. Furthermore, the nanogenerator shows a power density of 556.72 μW·m−2 with a load resistance of 76.89 MΩ and under 4g acceleration at 15 Hz. The output voltage of the NOP-TENG depicts a stable output performance even after 27,000 operation cycles. This nanogenerator can light eighteen green commercial LEDs and power a digital calculator. The proposed NOP-TENG has a simple structure, easy manufacturing process, stable electric behavior, and cost-effective output performance. This portable nanogenerator may power electronic devices using different vibration energy sources.
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Elvira-Hernández, Ernesto A., Juan C. Anaya-Zavaleta, Eustaquio Martínez-Cisneros, Francisco López-Huerta, Luz Antonio Aguilera-Cortés, and Agustín L. Herrera-May. "Electromechanical Modeling of Vibration-Based Piezoelectric Nanogenerator with Multilayered Cross-Section for Low-Power Consumption Devices." Micromachines 11, no. 9 (2020): 860. http://dx.doi.org/10.3390/mi11090860.

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Piezoelectric nanogenerators can convert energy from ambient vibrations into electrical energy. In the future, these nanogenerators could substitute conventional electrochemical batteries to supply electrical energy to consumer electronics. The optimal design of nanogenerators is fundamental in order to achieve their best electromechanical behavior. We present the analytical electromechanical modeling of a vibration-based piezoelectric nanogenerator composed of a double-clamped beam with five multilayered cross-sections. This nanogenerator design has a central seismic mass (910 μm thickness) and substrate (125 μm thickness) of polyethylene terephthalate (PET) as well as a zinc oxide film (100 nm thickness) at the bottom of each end. The zinc oxide (ZnO) films have two aluminum electrodes (100 nm thickness) through which the generated electrical energy is extracted. The analytical electromechanical modeling is based on the Rayleigh method, Euler–Bernoulli beam theory and Macaulay method. In addition, finite element method (FEM) models are developed to estimate the electromechanical behavior of the nanogenerator. These FEM models consider air damping at atmospheric pressure and optimum load resistance. The analytical modeling results agree well with respect to those of FEM models. For applications under accelerations in y-direction of 2.50 m/s2 and an optimal load resistance of 32,458 Ω, the maximum output power and output power density of the nanogenerator at resonance (119.9 Hz) are 50.44 μW and 82.36 W/m3, respectively. This nanogenerator could be used to convert the ambient mechanical vibrations into electrical energy and supply low-power consumption devices.
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Blanquer, Andreu, Oriol Careta, Laura Anido-Varela, et al. "Biocompatibility and Electrical Stimulation of Skeletal and Smooth Muscle Cells Cultured on Piezoelectric Nanogenerators." International Journal of Molecular Sciences 23, no. 1 (2021): 432. http://dx.doi.org/10.3390/ijms23010432.

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Nanogenerators are interesting for biomedical applications, with a great potential for electrical stimulation of excitable cells. Piezoelectric ZnO nanosheets present unique properties for tissue engineering. In this study, nanogenerator arrays based on ZnO nanosheets are fabricated on transparent coverslips to analyse the biocompatibility and the electromechanical interaction with two types of muscle cells, smooth and skeletal. Both cell types adhere, proliferate and differentiate on the ZnO nanogenerators. Interestingly, the amount of Zn ions released over time from the nanogenerators does not interfere with cell viability and does not trigger the associated inflammatory response, which is not triggered by the nanogenerators themselves either. The local electric field generated by the electromechanical nanogenerator–cell interaction stimulates smooth muscle cells by increasing cytosolic calcium ions, whereas no stimulation effect is observed on skeletal muscle cells. The random orientation of the ZnO nanogenerators, avoiding an overall action potential aligned along the muscle fibre, is hypothesised to be the cause of the cell-type dependent response. This demonstrates the need of optimizing the nanogenerator morphology, orientation and distribution according to the potential biomedical use. Thus, this study demonstrates the cell-scale stimulation triggered by biocompatible piezoelectric nanogenerators without using an external source on smooth muscle cells, although it remarks the cell type-dependent response.
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Rafique, Sumera, Ajab Khan Kasi, Jafar Khan Kasi, Aminullah, Muzamil Bokhari, and Zafar Shakoor. "Fabrication of silver-doped zinc oxide nanorods piezoelectric nanogenerator on cotton fabric to utilize and optimize the charging system." Nanomaterials and Nanotechnology 10 (January 1, 2020): 184798041989574. http://dx.doi.org/10.1177/1847980419895741.

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Textile-based piezoelectric nanogenerator generates electrical energy from human motion. Here a novel type of textile-based piezoelectric nanogenerator is reported which is fabricated using the growth of silver-doped zinc oxide on carton fabric. Along with the optical and structural characterization of silver-doped zinc oxide nanorods, the electrical characterization was also performed for silver-doped zinc oxide piezoelectric nanogenerator. The silver-doped zinc oxide piezoelectric nanogenerator was found to generate three times greater power compared to undoped zinc oxide piezoelectric nanogenerator. By applying external mechanical force of 3 kgf and 31 MΩ of load resistance, the silver-doped zinc oxide piezoelectric nanogenerator generated an output power density of 1.45 mW cm−2. The effect of load resistance and load capacitor was determined and optimum values were calculated. The maximum output power was observed at a load resistance of 31 MΩ. The silver-doped zinc oxide piezoelectric nanogenerator was utilized to charge load capacitors and found that maximum energy could be stored at optimum load capacitance of 22 nF in 600 s (1800 cycles). This research may provide the opportunity to design high-output textile-based nanogenerators for practical applications like powering portable devices and sensors.
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Jiang, Yijing, Yongju Deng, and Hongyan Qi. "Microstructure Dependence of Output Performance in Flexible PVDF Piezoelectric Nanogenerators." Polymers 13, no. 19 (2021): 3252. http://dx.doi.org/10.3390/polym13193252.

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Flexible piezoelectric nanogenerators have attracted great attention due to their ability to convert ambient mechanical energy into electrical energy for low-power wearable electronic devices. Controlling the microstructure of the flexible piezoelectric materials is a potential strategy to enhance the electrical outputs of the piezoelectric nanogenerator. Three types of flexible polyvinylidene fluoride (PVDF) piezoelectric nanogenerator were fabricated based on well-aligned nanofibers, random oriented nanofibers and thick films. The electrical output performance of PVDF nanogenerators is systematically investigated by the influence of microstructures. The aligned nanofiber arrays exhibit highly consistent orientation, uniform diameter, and a smooth surface, which possesses the highest fraction of the polar crystalline β phase compared with the random-oriented nanofibers and thick films. The highly aligned structure and the large fraction of the polar β phase enhanced the output performance of the well-aligned nanofiber nanogenerator. The highest output voltage of 14 V and a short-circuit current of 1.22 µA were achieved under tapping mode of 10 N at 2.5 Hz, showing the potential application in flexible electronic devices. These new results shed some light on the design of the flexible piezoelectric polymer-based nanogenerators.
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Dayana Kamaruzaman, Mohamad Hafiz Mamat, Nurul Izzati Kamal Ariffin, et al. "Effects of Thermal Annealing on The Morphology and Structural Characteristics of Zinc Oxide Nanopowders for Triboelectric Nanogenerator Applications." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 99, no. 1 (2022): 17–27. http://dx.doi.org/10.37934/arfmts.99.1.1727.

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The influence of thermal annealing on the surface morphologies and structural characteristics of zinc oxide (ZnO) nanopowders synthesized via the solution immersion method for triboelectric nanogenerator applications is reported in this paper. The ZnO nanopowders were thermally treated at different temperatures of annealing in the ranges between 300°C to 700°C for 1 hour, and their surface morphologies and structural properties were studied using field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) analysis. The ZnO nanopowders have a polycrystalline, hexagonal wurtzite structure and are composed of ZnO nanoparticles and hexagonal nanorods. ZnO based tribolectric nanogenerators were fabricated with these nanopowders and their performance was assessed in terms of the output voltage. It is found that the ZnO based triboelectric nanogenerator fabricated with ZnO nanopowders annealed at 500°C has superior performance compared with the other nanogenerators, with an average output voltage of 1.95 V. This corresponds to a fourfold increase in output voltage relative to that of the ZnO based triboelectric nanogenerator fabricated with as-deposited ZnO nanopowders. In conclusion, thermal annealing significantly influences particle size and crystallinity of ZnO nanopowders, which in turn, influences the output voltage of ZnO based triboelectric nanogenerators.
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Dissertations / Theses on the topic "Nanogenerator"

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Van, den Heever Thomas Stanley. "Development and optimisation of a zinc oxide nanowire nanogenerator." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85781.

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Thesis (PhD)--Stellenbosch University, 2013.
ENGLISH ABSTRACT: This study developed and optimised zinc oxide (ZnO) nanowire-based nanogenerator. The nanogenerator works on the piezoelectric effect that is, a mechanical force is converted to an electrical voltage. The ZnO nanowires are piezoelectric and when any force is applied to the nanowires an output voltage is generated. This ZnO nanowire-based nanogenerator can be used to power small electronic devices, such as pacemakers. The nanogenerator can also be incorporated into clothes and shoes to generate electricity to charge a cell phone for example. The problem experienced currently is that the nanogenerator does not generate enough electricity to be of practical use and needs to be further optimised. Simulations and mathematical models were used to identify areas where the nanogenerator could be optimised in order to increase the output voltage. It is shown that the morphology of the nanowires can have a considerable effect on the output voltage. For this reason the growth of the nanowires was investigated first. Different methods were used to propagate the nanowires in order to select the method that, on average, has the highest output voltage. Accordingly, one parameter at a time and design of experiments were used to optimise the nanowire growth. Consequently, these two methods were used to optimise the growth parameters with the respect to the output voltage. The aqueous solution method was found to yield nanowires that give the highest generated output voltage. After growing over 600 nanowire samples, optimal growth parameters for this method were found. These optimal growth parameters were subsequently used to grow nanowires that were used to manufacture the nanogenerator. The nanowires were grown on a solid substrate and hence the nanogenerator was also manufactured on the solid substrate. Through various optimisations of the manufacturing process the maximum output voltage achieved was about 500 mV. However, this output voltage is too low to be of practical use, even though the output has been raised considerably. The main problem was found to be the fact that the contact between the nanowires and the electrode was weak due to contamination. A new method was therefore required where the electrode and the nanowires would be in proper contact to ensure that higher output voltages were achieved. Subsequently, a flexible nanogenerator was manufactured in order to solve this problem. Accordingly, the nanowires were grown on the flexible polyimide film and a buffer layer was then spun onto the flexible substrate, leaving only the nanowire tips exposed. The electrode was then sputtered on top of this buffer layer, covering the nanowire tips. This ensured proper contact between the nanowires and the electrode. The nanogenerator, which was manufactured with non-optimal growth parameters, gives a maximum voltage output of 1 V, double the maximum achieved with the solid nanogenerator. When the optimal growth parameters were used the output voltage was raised to 2 V. Various optimisation techniques were performed on the nanogenerator, including plasma treatment and annealing and the use of various materials in the buffer layer. Combining these optimisation methods subsequently led to an optimised nanogenerator that can generate an output voltage of over 5 V. This was achieved after over 1200 nanogenerators had been manufactured. However, the output voltage was not in a usable form. Circuitry was therefore developed to transform the voltage generated by the nanogenerator to a useable form. The best circuit, the LTC3588, was used to power an LED for 10 seconds. The completed device was found to achieve a power output of 0.3 mW, enough for small electronic devices.
AFRIKAANSE OPSOMMING: ‘n Sink-oksied (ZnO) nanodraad gebaseerde nanogenerator is ontwikkeld en geöptimeer. Die nanogenerator werk met behulp van die piezoelektriese effek - meganiese krag work omgesit in ‘n elektriese spanning. Die ZnO nanodrade is piezoelektries en wanneer ‘n krag op die drade aangewend word, word ‘n uittree spanning gegenereer. Die nanogenerator kan gebruik word om klein elektroniese toestelle, soos ‘n pasaangeër, van krag te voorsien. Die nanogenerator kan in klere en skoene geïnkorporeer word om elektrisiteit op te wek vir die laai van ‘n selfoon. Die probleem is egter dat die nanogenerator tans nie genoeg krag opwek om prakties van nut te wees nie en verdere optimasie word benodig. Simulasies en wikundige modelle work gebruik om areas te identifiseer waar die nanogenerator geöptimeer kan word, met die doel om die uittreespanning te verhoog. Dit word bewys dat die morfologie van die nanodrade ‘n groot effek het op die uittreespanning. Dus word die groei van die nanodrade eerste ondersoek. Verskillende metodes word gebruik om die nanodrade te groei en die beste metode, wat die hoogste uittreespanning op gemiddeld verskaf, word gekies. Een parameter op ‘n slag en ontwerp van eksperimente word gebruik om die nanodraad groei te optimeer. Die groei parameters word geöptimeer deur van die twee metodes gebruik te maak, en die optimeering word gedoen in terme van die uittreespanning. Die oplossing groei metode lei tot nanodrade wat die hoogste uittreespanning verskaf. Na oor die 600 nanodraad monsters gegroei is, is die optimale parameters gevind. Hierdie optimale parameters word uitsluitlik gebruik om die nanogenerator te vervaardig. Die nanodrade word op ‘n soliede substraat gegroei en dus word die nanogenerator op dieselfde soliede substraat vervaardig. Verskeie metodes is gebruik om die vervaardiging te optimeer en die hoogste uittreespanning wat bereik is, is 500 mV. Die uittreespanning is te laag om van praktiese nut te wees alhoewel dit heelwat verhoog is. Die grootste probleem is die swak kontak tussen die nanodrade en die elektrode, wat veroorsaak word deur kontaminasie. ‘n Nuwe metode word verlang wat beter kontak tussen die nanodrade en elektrode sal verseker. ‘n Buigbare nanogenerator is vervaardig om die probleem op te los. Die nanodrade word nou op ‘n buigbare film gegroei. ‘n Bufferlaag word tussen die nanodrade in gedraai, tot net die punte van die nanodrade nog sigbaar is. Die elektrode word bo-op die bufferlaag gedeponeer, wat behoorlike kontak tussen die nanodrade en elektrode verseker. Die nanogenerator wat met nie-optimale groei parameters vervaardig is, bereik ‘n uittreespanning van 1 V, dubbel die soliede nanogenerator. Met optimale groei parameters word die uittreespanning tot 2 V verhoog. Verskeie optimasie tegnieke word op die nanogenerator toegepas. Die metodes sluit in suurstof plasma behandeling, verhitting en die inkorporasie van verskillende materiale in die bufferlaag. ‘n Kombinasie van die metodes geïnkorporeer in een nanogenerator lei tot ‘n uittreespanning van 5 V. Die uittreespanning is bereik na oor die 1200 nanogenerators vervaardig is. The uittreespanning is nog nie in ‘n bruikbare vorm nie. Spesiale stroombane is ontwikkel wat die nanogenerator spanning omskakel na ‘n bruikbare vorm. Die beste stroombaan, die LTC3588, kan ‘n LED aanskakel vir 10 sekondes. The toestel kan ook 0.3mWuittreekrag voorsien, genoeg vir klein elektroniese toestelle om te werk.
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Dönmez, Noyan Inci. "Improving the performance of an all-Si based thermoelectric micro/nanogenerator." Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/650830.

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Esta tesis presenta el desarrollo de un microgenerador termoeléctrico (μTEG) con el objetivo de alimentar nodos sensores inalámbricos de bajo consumo para aplicaciones en la Internet de las Cosas. El μTEG propuesto se ha fabricado mediante tecnologías de micromecanizado de silicio y haciendo uso de formaciones de nanohilos de silicio (Si) y de silicio/germanio (SiGe) como material termoeléctrico. Se han definido rutas tecnológicas de fabricación adecuadas para aumentar la densidad de potencia del μTEG. En particular, esta tesis se ha centrado en aumentar dicha potencia a partir de i) la optimización térmica y eléctrica de la microplataforma termoeléctrica, y ii) integrando un intercambiador de calor en los μTEGs propuestos. Las prestaciones térmicas del μTEG se han mejorado reduciendo las pérdidas parásitas de calor entre las partes calientes y frías de la microplataforma, lo que ha resultado en una reducción del 34% en la conductancia térmica. Las prestaciones eléctricas, por otro lado, han mejorado aún más importantemente al reducir la resistencia interna del dispositivo entre 7 y 20 veces. Ambos logros se han conseguido mediante el rediseño de la arquitectura y de algunos de los procesos de fabricación del μTEG. Aunque las densidades de potencia obtenidas para los μTEG optimizados se acercan a las necesidades de nodos sensores de bajo consumo (10-100 μW/cm2), se ha intentado mejorar su comportamiento mediante la integración de un intercambiador de calor. Para dicha integración se han ensayado dos rutas diferentes, en función de la dirección del flujo de calor en el dispositivo. En cualquier caso, se ha podido observar un incremento significativo de prestaciones para todos los μTEGs considerados (Si NWs, SiGe NWs y Si microbeams). Los μTEGs con intercambiador de calor integrado han sido capaces de colectar densidades de potencia de 41.2 (Si NWs), 45.2 (SiGe NWs) and 34.5 μW/cm2 (Si microbeams) cuando se han dispuesto sobre placas calientes a 100 ◦C de temperatura. Esto supone un incremento de 50-1000 veces con respecto a dispositivos similares sin el intercambiador de calor en esas mismas condiciones. Los resultados obtenidos en esta tesis están bien posicionados en relación al estado del arte de μTEGs. Además, esta tesis, junto con otra también llevada a cabo en colaboración con el IREC, reportan por primera vez μTEGs basados en nanohilos de SiGe.
This thesis presents the development of a thermoelectric microgenerator (μTEG) with the aim of powering low power wireless sensor nodes for Internet of Things applications. The proposed μTEG is fabricated by means of silicon micromachining technologies and makes use of silicon (Si) and silicon/germanium (SiGe) nanowire (NW) arrays as thermoelectric material. Specific technological routes are designed to increase the power density of the μTEG. Particularly, this thesis has been focused on increasing the power density through i) thermal and electrical optimization of the thermoelectric microplatform, ii) integration of a heat exchanger on the proposed μTEGs. The thermal performance of the μTEG is enhanced by reducing the parasitic thermal losses between the hot and cold ends which ended up in %34 decrease of the thermal conductance. The electrical performance, on the other hand is improved tremendously by lowering the device internal resistance 7 to 20 times. Both has been achieved through the redesign of the architecture and processing steps for μTEG. Even though the power densities obtained from the optimized μTEGs are close to meet the expectations for low power sensor nodes (10-100 μW/cm2), further improvement is aimed by the integration of a heat exchanger. Two different routes with different heat flow directions have been designed for the integration of a heat exchanger. With the integration of the heat exchanger, a significant amount of improvement has been observed for all tested μTEGs based on different thermoelectric materials (Si NWs, SiGe NWs and Si microbeams). μTEGs with integrated heat exchanger were able to harvest 41.2 (Si NWs), 45.2 (SiGe NWs) and 34.5 μW/cm2 (Si microbeams) when they were placed on a waste heat source of 100 ◦C. This is 50-1000 times more than for similar devices without heat exchanger at the same hot plate temperature. Results obtained in this thesis are well positioned compared with the state-of-the-art μTEGs. In addition, this thesis, together with the one performed in collaboration at IREC, reports for first time on the performance of SiGe NWs based μTEG.
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Wang, Sihong. "Nanogenerator for mechanical energy harvesting and its hybridization with li-ion battery." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53437.

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Energy harvesting and energy storage are two most important technologies in today's green and renewable energy science. As for energy harvesting, the fundamental science and practically applicable technologies are not only essential in realizing the self-powered electronic devices and systems, but also tremendously helpful in meeting the rapid-growing world-wide energy consumptions. Mechanical energy is one of the most universally-existing, diversely-presenting, but usually-wasted energies in the natural environment. Owing to the limitations of the traditional technologies for mechanical energy harvesting, it is highly desirable to develop new technology that can efficiently convert different types of mechanical energy into electricity. On the other hand, the electricity generated from environmental energy often needs to be stored before used to drive electronic devices. For the energy storage units such as Li-ion batteries as the power sources, the limited lifetime is the prominent problem. Hybridizing energy harvesting devices with energy storage units could not only provide new solution for this, but also lead to the realization of sustainable power sources. In this dissertation, the research efforts have led to several critical advances in a new technology for mechanical energy harvesting—triboelectric nanogenerators (TENGs). Previous to the research of this dissertation, the TENG only has one basic mode—the contact mode. Through rational structural design, we largely improved the output performance of the contact-mode TENG and systematically studied their characteristics as a power source. Beyond this, we have also established the second basic mode for TENG—the lateral sliding mode, and demonstrated sliding-based disk TENGs for harvesting rotational energy and wind-cup-based TENGs for harvesting wind energy. In order to expand the application and versatility of TENG by avoid the connection of the electrode on the moving part, we further developed another basic mode—freestanding-layer mode, which is capable of working with supreme stability in non-contact mode and harvesting energy from any free-moving object. Both the grating structured and disk-structured TENGs based on this mode also display much improved long-term stability and very high energy conversion efficiency. For the further improvement of the TENG’s output performance from the material aspect, we introduced the ion-injection method to study the maximum surface charge density of the TENG, and for the first time unraveled its dependence on the structural parameter—the thickness of the dielectric film. The above researches have largely propelled the development of TENGs for mechanical energy harvesting and brought a big potential of impacting people’s everyday life. Targeted at developing sustainable and independent power sources for electronic devices, efforts have been made in this dissertation to develop new fundamental science and new devices that hybridize the nanogenerator-based mechanical energy harvesting and the Li-ion-battery-based energy storage process into a single-step process or in a single device. Through hybridizing a piezoelectric nanogenerator with a Li-ion battery, a self-charging power cell has been demonstrated based on a fundamentally-new mechanical-to-electrochemcial process. The triboelectric nanogenerator as a powerful technology for mechanical energy harvesting has also been hybridized with a Li-ion battery into a self-charging power unit. This new concept of device can sustainably provide a constant voltage for the non-stop operation of electronic devices.
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Dhakras, D. "Novel flexible device platforms using electrospinning process for sensor and nanogenerator applications." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2015. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2254.

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Song, Jinhui. "Nanogenerators." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24772.

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Thesis (Ph.D.)--Materials Science and Engineering, Georgia Institute of Technology, 2008.
Committee Chair: Zhong lin Wang; Committee Member: Christopher J. Summers; Committee Member: Kenneth A. Gall; Committee Member: Robert L. Snyder; Committee Member: Russell D. Dupuis.
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6

Pradel, Ken Charles. "Antimony doped p-type zinc oxide for piezotronics and optoelectronics." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54386.

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Zinc oxide is a semiconducting material that has received lot of attention due to its numerous proeprties such as wide direct band gap, piezoelectricity, and numerous low cost and robust methods of synthesizing nanomaterials. Its piezoelectric properties have been harnessed for use in energy production through nanogenerators, and to tune carrier transport, birthing a field known as piezotronics. However, one weakness of ZnO is that it is notoriously difficult to dope p-type. Antimony was investigated as a p-type dopant for ZnO, and found to have a stability of up to 3 years, which is completely unprecedented in the literature. Furthermore, a variety of zinc oxide structures ranging from ultra-long nanowires to thin films were produced and their piezotronic properties were demonstrated. By making p-n homojunctions using doped and undoped ZnO, enhanced nanogenerators were produced which could see application in gesture recognition. As a proof of concept, a simple photodetector was also derived from a core-shell nanowire structure. Finally, the ability to integrate this material with other semiconductors was demonstrated by growing a heterojunction with silicon nanowires, and investigating its electrical properties. All this work together lays the foundation for a fundamentally new material that could see application in future electronics, optoelectronics, and human-machine interfacing.
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Armas, Jeremy A. "Influence of High Aspect Ratio Nanoparticle Filler Addition on Piezoelectric Nanocomposites." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/2026.

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Piezoelectric nanogenerators (PNGs) are a new class of energy harvesting materials that show potential as a direct energy source for low powered electronics. Recently, piezoelectric polymers have been utilized for PNG technology due to low toxicity, high flexibility, and facile solution processing which provide manufacturing opportunities such as screen printing. Throughout the last decade, countless projects have focused on how to enhance the energy harvesting capabilities of these PNGs through the incorporation of nanoparticle fillers, which have been reported to enhance the piezoelectric properties of the film either directly through their intrinsic piezoelectric properties or through acting as surfaces for the interfacial nucleation of piezoelectric polymer crystals. Herein, two systems of PNGs formed from piezoelectric copolymers poly(vinylidene fluoride-co-hexafluropropylene) or poly(vinylidene fluoride-co-trifluoroethylene) mixed with high aspect ratio zinc oxide nanowires, hydroxyl functionalized multi-walled carbon nanotubes, or carboxylic acid functionalized single walled carbon nanotubes were investigated. Variations of filler type and loading are tested to determine influences on film morphology and piezoelectric properties. Power harvesting tests are conducted to directly determine the effect of nanoparticle addition on the output power of the non-poled devices. Both copolymer systems are found to exhibit a non-linear increase in output power with the increase of nanoparticle filler loading. The crystal polymorph properties of both systems are investigated by Fourier transform infrared spectroscopy. The microstructure of the poly(vinylidene fluoride-co-trifluoroethylene) films are further examined using X-ray diffraction, differential scanning calorimetry, polarized optical microscopy, and atomic force microscopy to determine the mechanism behind the increased power harvesting capabilities. As well, explanations for perceived output power from “self-poled” films are briefly explored.
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Satti, Nour Eiman. "Development of Zinc Oxide Piezoelectric Nanogenerators for Low Frequency Applications." Doctoral thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-131858.

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Energy harvesting using piezoelectric nanomaterials provides an opportunity for advancement towards self-powered systems. Self-powered systems are a new emerging technology, which allows the use of a system or a device that perform a function without the need for external power source like for example, a battery or any other type of source. This technology can for example use harvested energy from sources around us such as ambient mechanical vibrations, noise, and human movement, etc. and convert it to electric energy using the piezoelectric effect. For nanoscale devices, the size of traditional batteries is not suitable and will lead to loss of the concept of “nano”. This is due to the large size and the relatively large magnitude of the delivered power from traditional sources. The development of a nanogenerator (NG) to convert energy from the environment into electric energy would facilitate the development of some self-powered systems relying on nano- devices. The main objective of this thesis is to fabricate a piezoelectric Zinc Oxide (ZnO) NGs for low frequency (˂ 100 Hz) energy harvesting applications. For that, different types of NGs based on ZnO nanostructures have been carefully developed, and studied for testing under different kinds of low frequency mechanical deformations. Well aligned ZnO nanowires (NWs) possessing high piezoelectric coefficient were synthesized on flexible substrates using the low temperature hydrothermal route. These ZnO NWs were then used in different configurations to demonstrate different low frequency energy harvesting devices. Using piezoelectric ZnO NWs, we started with the fabrication of sandwiched NG for hand writing enabled energy harvesting device based on a thin silver layer coated paper substrate. Such device configurations can be used for the development of electronic programmable smart paper. Further, we developed this NG to work as a triggered sensor for wireless system using foot-step pressure. These studies demonstrate the feasibility of using ZnO NWs piezoelectric NG as a low-frequency self-powered sensor, with potential applications in wireless sensor networks. After that, we investigated and fabricated a sensor on PEDOT: PSS plastic substrate either by one side growth technique or by using double sided growth. For the first growth technique, the fabricated NG has been used as a sensor for acceleration system; while the fabricated NG by the second technique has worked as anisotropic directional sensor. This fabricated configurations showed stability for sensing and can be used in surveillance, security, and auto-mobil applications. In addition to that, we investigated the fabrication of a sandwiched NG on plastic substrates. Finally, we demonstrated that doping ZnO NWs with extrinsic element (such as Ag) will lead to the reduction of the piezoelectric effect due to the loss of crystal symmetry. A brief summary into future opportunities and challenges are also presented in the last chapter of this thesis.
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Feng, Ziang. "Wearable Power Sources and Self-powered Sensors Based on the Triboelectric Nanogenerators." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/103020.

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The triboelectric nanogenerator (TENG) has attracted global attention in the fields of power sources and self-powered sensors. By coupling the omnipresent triboelectrification effect and the electrical induction effect, the TENGs can transduce ambient mechanical energy into electrical energy. Such energy could be consumed instantaneously or stored for later use. In this way, they could be deployed distributedly to be compatible power sources in the era of the internet of things (IoTs), completing the powering structure that is currently relying on power plants. Also, the electrical signals can reflect the environment changes around the TENGs. Thus, the TENGs can serve as self-powered sensors in the IoTs. In this work, we adopted two approaches for TENG fabrication: the thermal drawing method (TDP) and 3D printing. With TDP, we have fabricated scalable fiber-based triboelectric nanogenerators (FTENG), which have been woven into textiles by an industrial loom for wearable use. This fabrication process can supply FTENG on a large scale and fast speed, bridging the gap between the TENG and weaving industry. With 3D printing, we have fabricated TENGs that are compatible with the shape of arbitrary substrates. They have been used as biocompatible sensors: human-skin-compatible TENG has been used to recognize silent speech in real-time by sensing the chin movement; the porcine-kidney-shaped fiber mesh has been used to monitor the perfusion rate of the organ. These works have extended the territory of TENGs and can be critical components in the IoTs.
Ph.D.
Portable electronic devices have become important components in our daily lives, and we are entering the era of the Internet of Things (IoTs), where everyday objects can be interconnected by the internet. While electricity is essential to all of these devices, the traditional power sources are commonly heavy and bulky and need to be recharged or directly connected to the immobile power plants. Researchers have been working to address this mismatch between the device and power systems. The triboelectric nanogenerators (TENG) are good candidates because they can harvest energy in the ambient environment. The users can use them to generate electricity by merely making the rubbing motion. In this work, we report two fabrication methods of the fiber-based triboelectric nanogenerators (FTENG). With the thermal drawing process, we have fabricated sub-kilometer-long FTENG and wove it with the regular cotton yarn into textiles. The wearable power source is human friendly as it does not induce any extra weight load for the user. Besides, we have demonstrated that such long fibers can work as self-powered distributed sensors, such as a Morse code generator. With 3D printing, we have fabricated FTENG-based devices that conform to the working substrates, which can be any shape. We have employed them as biofriendly sensors to translate the chin movement during speaking to language and to monitor the perfusion rate of a pig kidney. The FTENGs have offered excellent comfortability to the users and can play a vital role in reframing the power structure to be compatible with IoTs.
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Chen, Jun. "Triboelectric nanogenerators." Diss., Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/54956.

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With the threatening of global warming and energy crises, searching for renewable and green energy resources with reduced carbon emissions is one of the most urgent challenges to the sustainable development of human civilization. In the past decades, increasing research efforts have been committed to seek for clean and renewable energy sources as well as to develop renewable energy technologies. Mechanical motion ubiquitously exists in ambient environment and people’s daily life. In recent years, it becomes an attractive target for energy harvesting as a promising supplement to traditional fuel sources and a potentially alternative power source to battery-operated electronics. Until recently, the mechanisms of mechanical energy harvesting are limited to transductions based on piezoelectric effect, electromagnetic effect, electrostatic effect and magnetostrictive effect. Widespread usage of these techniques is likely to be shadowed by possible limitations, such as structure complexity, low power output, fabrication of high-quality materials, reliance on external power sources and little adaptability on structural design for different applications. In 2012, triboelectric nanogenerator (TENG), a creative invention for harvesting ambient mechanical energy based on the coupling between triboelectric effect and electrostatic effect has been launched as a new and renewable energy technology. The concept and design presented in this thesis research can greatly promote the development of TENG as both sustainable power sources and self-powered active sensors. And it will greatly help to define the TENG as a fundamentally new green energy technology, featured as being simple, reliable, cost-effective as well as high efficiency.
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Books on the topic "Nanogenerator"

1

Han, Mengdi, Xiaosheng Zhang, and Haixia Zhang, eds. Flexible and Stretchable Triboelectric Nanogenerator Devices. Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527820153.

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Inamuddin, Mohd Imran Ahamed, Rajender Boddula, and Tariq Altalhi. Nanogenerators. CRC Press, 2022. http://dx.doi.org/10.1201/9781003187615.

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Wang, Zhong Lin, Long Lin, Jun Chen, Simiao Niu, and Yunlong Zi. Triboelectric Nanogenerators. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40039-6.

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Wang, Zhong Lin, Ya Yang, Junyi Zhai, and Jie Wang, eds. Handbook of Triboelectric Nanogenerators. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-05722-9.

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Zhang, Xiaosheng, Mengdi Han, and Haixia Zhang. Flexible and Stretchable Triboelectric Nanogenerator Devices: Toward Self-Powered Systems. Wiley & Sons, Incorporated, John, 2019.

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Zhang, Xiaosheng, Mengdi Han, and Haixia Zhang. Flexible and Stretchable Triboelectric Nanogenerator Devices: Toward Self-Powered Systems. Wiley & Sons, Incorporated, John, 2019.

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Zhang, Xiaosheng, Mengdi Han, and Haixia Zhang. Flexible and Stretchable Triboelectric Nanogenerator Devices: Toward Self-Powered Systems. Wiley & Sons, Incorporated, John, 2019.

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Zhang, Xiaosheng, Mengdi Han, and Haixia Zhang. Flexible and Stretchable Triboelectric Nanogenerator Devices: Toward Self-Powered Systems. Wiley-VCH Verlag GmbH, 2019.

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Jae Kim, Sang, Arunkumar Chandrasekhar, and Nagamalleswara Rao Alluri, eds. Nanogenerators. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.78915.

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Inamuddin, Rajender Boddula, Mohd Imran Ahamed, and Tariq Altalhi. Nanogenerators. Taylor & Francis Group, 2022.

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Book chapters on the topic "Nanogenerator"

1

Xiao, Xiao, Junyi Yin, and Jun Chen. "Triboelectric Nanogenerator for Healthcare." In Handbook of Triboelectric Nanogenerators. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-05722-9_18-1.

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Prasanna, Asokan Poorani Sathya, Gaurav Khandelwal, and Sang-Jae Kim. "Triboelectric Nanogenerator for Sports." In Handbook of Triboelectric Nanogenerators. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-05722-9_28-1.

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Xiao, Xiao, Junyi Yin, and Jun Chen. "Triboelectric Nanogenerator for Healthcare." In Handbook of Triboelectric Nanogenerators. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-28111-2_18.

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Prasanna, Asokan Poorani Sathya, Gaurav Khandelwal, and Sang-Jae Kim. "Triboelectric Nanogenerator for Sports." In Handbook of Triboelectric Nanogenerators. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-28111-2_28.

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Wang, Zhong Lin, Long Lin, Jun Chen, Simiao Niu, and Yunlong Zi. "Triboelectric Nanogenerator: Lateral Sliding Mode." In Triboelectric Nanogenerators. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40039-6_3.

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Wang, Zhong Lin, Long Lin, Jun Chen, Simiao Niu, and Yunlong Zi. "Triboelectric Nanogenerator: Single-Electrode Mode." In Triboelectric Nanogenerators. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40039-6_4.

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Wang, Zhong Lin, Long Lin, Jun Chen, Simiao Niu, and Yunlong Zi. "Hybrid Cell Composed of Triboelectric Nanogenerator." In Triboelectric Nanogenerators. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40039-6_12.

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Wang, Zhong Lin, Long Lin, Jun Chen, Simiao Niu, and Yunlong Zi. "Triboelectric Nanogenerator: Vertical Contact-Separation Mode." In Triboelectric Nanogenerators. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40039-6_2.

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Wang, Zhong Lin, Long Lin, Jun Chen, Simiao Niu, and Yunlong Zi. "Triboelectric Nanogenerator: Freestanding Triboelectric-Layer Mode." In Triboelectric Nanogenerators. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40039-6_5.

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Guo, Hengyu, and Jie Chen. "Triboelectric Nanogenerator for Particle Filtering." In Handbook of Triboelectric Nanogenerators. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-05722-9_37-1.

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Conference papers on the topic "Nanogenerator"

1

Voiculescu, Ioana, Fang Li, Glen Kowach, Hao Su, and Kun Lin Lee. "Wearable and Stretchable Piezoelectric Nanogenerator for Skin Applications." In 2018 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/dmd2018-6874.

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The paper describes a stretchable piezoelectric nanogenerator that is intended to harvest energy. The nanogenerator was fabricated from zinc oxide (ZnO) piezoelectric thin film embedded in polymer materials. The microfabricated nanogenerator has the thickness in the micrometer scale to be attached on the skin and stretched by the natural movements of arms, legs or neck. We expect that energy harvested by this device will be able to power wearable skin sensors.
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Ghosh, Sujoy Kumar, Mengying Xie, Christopher Rhys Bowen, and Dipankar Mandal. "All-fiber pyroelectric nanogenerator." In DAE SOLID STATE PHYSICS SYMPOSIUM 2017. Author(s), 2018. http://dx.doi.org/10.1063/1.5029156.

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Wang, Zhong Lin. "Nanogenerator and nano-piezotronics." In 8th International Vacuum Electron Sources Conference and Nanocarbon (2010 IVESC). IEEE, 2010. http://dx.doi.org/10.1109/ivesc.2010.5644379.

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Voiculescu, Ioana, and Kun Lin Lee. "Stretchable nanogenerator for optoelectronics." In Advances in 3OM: Opto-Mechatronics, Opto-Mechanics, and Optical Metrology, edited by Jannick P. Rolland, Virgil-Florin Duma, and Adrian G. H. Podoleanu. SPIE, 2022. http://dx.doi.org/10.1117/12.2599645.

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Barri, Kaveh, Qianyun Zhang, Pengcheng Jiao, Zhong Lin Wang, and Amir H. Alavi. "Multifunctional metamaterial sensor and nanogenerator." In Behavior and Mechanics of Multifunctional Materials XV, edited by Ryan L. Harne. SPIE, 2021. http://dx.doi.org/10.1117/12.2581050.

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Yang, Ya. "Hybridized Nanogenerator for Scavenging Mechanical Energy." In Photonics for Energy. OSA, 2015. http://dx.doi.org/10.1364/pfe.2015.pt1f.4.

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Sultana, Ayesha, Tapas Ranjan Middya, and Dipankar Mandal. "ZnS-paper based flexible piezoelectric nanogenerator." In DAE SOLID STATE PHYSICS SYMPOSIUM 2017. Author(s), 2018. http://dx.doi.org/10.1063/1.5029058.

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Kaur, Navjot, and Kaushik Pal. "Oxidized graphene nanoribbons based triboelectric nanogenerator." In Proceedings of the International Conference on Nanotechnology for Better Living. Research Publishing Services, 2016. http://dx.doi.org/10.3850/978-981-09-7519-7nbl16-rps-185.

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Ali, Mehran, Saeed Ahmed Khan, Abdul Qadir Rahimoon, et al. "Triboelectric Nanogenerator Scavenging Sliding Motion Energy." In 2019 2nd International Conference on Computing, Mathematics and Engineering Technologies (iCoMET). IEEE, 2019. http://dx.doi.org/10.1109/icomet.2019.8673440.

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Chang, Chieh, Yiin-Kuen Fuh, and Liwei Lin. "A direct-write piezoelectric PVDF nanogenerator." In TRANSDUCERS 2009 - 2009 International Solid-State Sensors, Actuators and Microsystems Conference. IEEE, 2009. http://dx.doi.org/10.1109/sensor.2009.5285796.

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Reports on the topic "Nanogenerator"

1

Wang, Zhong L. Piezoelectric Nanogenerators for Self-Powered Nanosystems and Nanosensors. Defense Technical Information Center, 2013. http://dx.doi.org/10.21236/ada587995.

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Armas, J. A. Morphological and Electrical Properties of P(VDF-TrFE) Piezoelectric Nanogenerators Modified with High Aspect Ratio Fillers. Office of Scientific and Technical Information (OSTI), 2018. http://dx.doi.org/10.2172/1476201.

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