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Journal articles on the topic 'Light-assisted sensing'

Author: Grafiati

Published: 11 December 2022

Last updated: 26 January 2023

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1

Della Ventura, Bartolomeo, Luigi Schiavo, Carlo Altucci, Rosario Esposito, and Raffaele Velotta. "Light assisted antibody immobilization for bio-sensing." Biomedical Optics Express 2, no. 11 (October 28, 2011): 3223. http://dx.doi.org/10.1364/boe.2.003223.

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2

Caucheteur, Christophe. "Light Polarization-Assisted Sensing with Tilted Fiber Bragg Gratings." Open Optics Journal 7, no. 1 (2013): 95–103. http://dx.doi.org/10.2174/1874328501307010095.

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3

Sonia, T., and B. G. Jeyaprakash. "Visible light assisted acetone sensing characteristics of ZnO deposited over LED." Materials Letters 301 (October 2021): 130303. http://dx.doi.org/10.1016/j.matlet.2021.130303.

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4

Park, Sunghoon, Soohyun Kim, Hyunsung Ko, and Chongmu Lee. "Light Assisted Room Temperature Ethanol Gas Sensing of ZnO–ZnS Nanowires." Journal of Nanoscience and Nanotechnology 14, no. 12 (December 1, 2014): 9025–28. http://dx.doi.org/10.1166/jnn.2014.10065.

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5

Mishra, Prashant Kumar, Saniya Ayaz, Bungkiu Kissinquinker, and Somaditya Sen. "Defects assisted visible light sensing in Zn1 − x(GaSi)x/2O." Journal of Applied Physics 127, no. 15 (April 21, 2020): 154501. http://dx.doi.org/10.1063/1.5139896.

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6

SHARMA, RAJVEER, K. S. DAYA, and PREM SARAN TIRUMALAI. "LIGHT ASSISTED IN-VIVO MICROWAVE SENSING FOR ELECTRICAL CHARACTERIZATION OF PROKARYOTES." Biophysical Reviews and Letters 07, no. 03n04 (December 2012): 219–27. http://dx.doi.org/10.1142/s1793048012500105.

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This paper reports an in vivo characterization technique to characterize dielectric properties of living tissues and bio-molecules at microwave frequency using cavity perturbation technique, where a slot ring resonant sensor has been used, that works at 8 GHz and has been designed to enumerate the effective dielectric constant of Spirulina platensis and chlorophyll molecule. Observed value of the dielectric constant of Spirulina platensis was 8 ± 0.04 in the absence of light and 14.575 ± 0.145 in the presence of light. Molecular polarizability of chl a molecule was 5.07 ± 0.05 × 104 Å3. Experimentally calculated local electric field actually experienced by chl a molecule was 14.197 ± 0.003 V/m for applied field of 9.79 V/m across the slot ring, dipole moment of chl a molecule was 2.175 ± 0.005 × 105 Debye and total polarisation produced due to these molecules was 1.545 ± 0.005 C/m 2. Observed relaxation time of chl a molecule was 8.09 ± 0.18 × 10-9 s . The proposed sensing method can be an alternate to spectral characterisation technique, generally used to characterize light sensitive bio-molecules and can also be extended to characterize light sensitive bio-molecules in plant cells.

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7

Sabek, Jad, Luis Torrijos-Morán, Amadeu Griol, Zeneida Díaz Betancor, María-José Bañuls Polo, Ángel Maquieira, and Jaime García-Rupérez. "Real Time Monitoring of a UV Light-Assisted Biofunctionalization Protocol Using a Nanophotonic Biosensor." Biosensors 9, no. 1 (December 30, 2018): 6. http://dx.doi.org/10.3390/bios9010006.

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A protocol for the covalent biofunctionalization of silicon-based biosensors using a UV light-induced thiol–ene coupling (TEC) reaction has been developed. This biofunctionalization approach has been used to immobilize half antibodies (hIgG), which have been obtained by means of a tris(2-carboxyethyl)phosphine (TCEP) reduction at the hinge region, to the surface of a vinyl-activated silicon-on-insulator (SOI) nanophotonic sensing chip. The response of the sensing structures within the nanophotonic chip was monitored in real time during the biofunctionalization process, which has allowed us to confirm that the bioconjugation of the thiol-terminated bioreceptors onto the vinyl-activated sensing surface is only initiated upon UV light photocatalysis.

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8

Zhu, Junlun, Wei Nie, Qin Wang, Wei Wen, Xiuhua Zhang, Fujun Li, and Shengfu Wang. "A competitive self-powered sensing platform based on a visible light assisted zinc–air battery system." Chemical Communications 56, no. 43 (2020): 5739–42. http://dx.doi.org/10.1039/d0cc01163k.

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We developed a competitive and oxygen concentration sensitive self-powered sensing platform based on the discharge process of a visible light assisted zinc–air battery system for the detection of targets.

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9

Hsu, Wei-En, Yu-Hao Chang, Yu-Jie Huang, Jui-Cheng Huang, and Chih-Ting Lin. "A pH/Light Dual-Modal Sensing ISFET Assisted by Artificial Neural Networks." ECS Transactions 89, no. 6 (April 9, 2019): 31–37. http://dx.doi.org/10.1149/08906.0031ecst.

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10

Li, Hua-Yao, Ji-Won Yoon, Chul-Soon Lee, Kyeorei Lim, Ji-Wook Yoon, and Jong-Heun Lee. "Visible light assisted NO2 sensing at room temperature by CdS nanoflake array." Sensors and Actuators B: Chemical 255 (February 2018): 2963–70. http://dx.doi.org/10.1016/j.snb.2017.09.118.

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11

Zhang, Qiuping, Guangzhong Xie, Ming Xu, Yuanjie Su, Huiling Tai, Hongfei Du, and Yadong Jiang. "Visible light-assisted room temperature gas sensing with ZnO-Ag heterostructure nanoparticles." Sensors and Actuators B: Chemical 259 (April 2018): 269–81. http://dx.doi.org/10.1016/j.snb.2017.12.052.

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12

Marin, Iuliana, Andrei Vasilateanu, Arthur-Jozsef Molnar, Maria Bocicor, David Cuesta-Frau, Antonio Molina-Picó, and Nicolae Goga. "i-Light—Intelligent Luminaire Based Platform for Home Monitoring and Assisted Living." Electronics 7, no. 10 (September 28, 2018): 220. http://dx.doi.org/10.3390/electronics7100220.

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We present i-Light, a cyber-physical platform that aims to help older adults to live safely within their own homes. The system is the result of an international research project funded by the European Union and is comprised of a custom developed wireless sensor network together with software services that provide continuous monitoring, reporting and real-time alerting capabilities. The principal innovation proposed within the project regards implementation of the hardware components in the form of intelligent luminaires with inbuilt sensing and communication capabilities. Custom luminaires provide indoor localisation and environment sensing, are cost-effective and are designed to replace the lighting infrastructure of the deployment location without prior mapping or fingerprinting. We evaluate the system within a home and show that it achieves localisation accuracy sufficient for room-level detection. We present the communication infrastructure, and detail how the software services can be configured and used for visualisation, reporting and real-time alerting.

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13

Prajapati, Yogendra Kumar, J. B. Maurya, and Anuj K. Sharma. "Tunable and enhanced performance of graphene-assisted plasmonic sensor with photonic spin Hall effect in near infrared: analysis founded on graphene’s chemical potential and components of light polarization." Journal of Physics D: Applied Physics 55, no. 9 (November 19, 2021): 095102. http://dx.doi.org/10.1088/1361-6463/ac37e0.

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Abstract In this work, we propose a graphene-assisted plasmonic structure with photonic spin Hall effect (PSHE) for sensing applications in near infrared with an emphasis on tunable and spin control aspects leading to enhanced performance. We comprehensively investigate PSHE in view of variable chemical doping of graphene monolayer in the structure and manipulation of the spin dependent splitting by considering single and cross polarization states. There is observed a considerable variation in spin shift due to increase in chemical potential or Pauli blocking, which fundamentally controls the light absorption by graphene. Our simulation results reveal that the amplified spin dependent shift (SDS) is 1.13 × 104 times higher than the conventional SDS at 0.436 eV of graphene chemical potential. Further, this structure is utilised for sensing application, and it is observed that graphene-assisted plasmonic based structure possesses significantly greater spin dependent sensitivity (5.53 times), figure of merit (8.56 × 105 times), and extremely finer limit of detection (by a factor of 18.10) are achieved compared to the structure without graphene. The results indicate that choosing the proposed graphene-assisted plasmonic structure with variable chemical potential and light polarization components, an extremely enhanced sensing performance can be achieved. The results are consistent with the physical rationale and are particularly important for potential biosensing applications.

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14

de Palma, João V. N., Ariadne C. Catto, Marisa C. de Oliveira, Renan A. P. Ribeiro, Marcio D. Teodoro, and Luís F. da Silva. "Light-assisted ozone gas-sensing performance of SnO2 nanoparticles: Experimental and theoretical insights." Sensors and Actuators Reports 4 (November 2022): 100081. http://dx.doi.org/10.1016/j.snr.2022.100081.

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15

Geng, Xin, Jiajun You, Jie Wang, and Chao Zhang. "Visible light assisted nitrogen dioxide sensing using tungsten oxide - Graphene oxide nanocomposite sensors." Materials Chemistry and Physics 191 (April 2017): 114–20. http://dx.doi.org/10.1016/j.matchemphys.2017.01.046.

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16

Kang, Yunsung, Soonjae Pyo, Eunhwan Jo, and Jongbaeg Kim. "Light-assisted recovery of reacted MoS2 for reversible NO2 sensing at room temperature." Nanotechnology 30, no. 35 (June 12, 2019): 355504. http://dx.doi.org/10.1088/1361-6528/ab2277.

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17

Kim, Minkyung, Dasol Lee, Yeseul Kim, and Junsuk Rho. "Nanophotonic-assisted precision enhancement of weak measurement using spin Hall effect of light." Nanophotonics 11, no. 20 (September 5, 2022): 4591–600. http://dx.doi.org/10.1515/nanoph-2022-0447.

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Abstract The spin Hall effect of light, i.e., the microscopic and spin-dependent transverse splitting of linearly polarized light into circular polarizations at an optical interface, has been considered as a promising candidate for high-precision measurement when combined with a weak measurement technique. However, in those previous demonstrations, the precision is determined by the interface of interest, hindering its versatility. Here, by leveraging the direct correlation of precision with the spin Hall shift, we propose nanophotonic-assisted approaches to increase the precision of the weak measurement by controlling the spin Hall effect of light at the target interface. The refractive index sensing of an isotropic medium is demonstrated as a proof of concept, in which the precision can be increased, in principle, to infinity by placing an index-below-unity slab in the vicinity of the target interface. Furthermore, a single-layer metasurface comprising two-dimensional subwavelength patterns is introduced as an experimentally favorable platform. This study lays the foundation for nondestructive and high-precision investigation of unknown parameters of interfaces and will find wide sensing applications in material science, medical engineering, and other interdisciplinary fields.

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18

Tang, Chaolong, Mehrdad Shiri, Haixin Zhang, Ridwan Tobi Ayinla, and Kun Wang. "Light-Driven Charge Transport and Optical Sensing in Molecular Junctions." Nanomaterials 12, no. 4 (February 19, 2022): 698. http://dx.doi.org/10.3390/nano12040698.

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Probing charge and energy transport in molecular junctions (MJs) has not only enabled a fundamental understanding of quantum transport at the atomic and molecular scale, but it also holds significant promise for the development of molecular-scale electronic devices. Recent years have witnessed a rapidly growing interest in understanding light-matter interactions in illuminated MJs. These studies have profoundly deepened our knowledge of the structure–property relations of various molecular materials and paved critical pathways towards utilizing single molecules in future optoelectronics applications. In this article, we survey recent progress in investigating light-driven charge transport in MJs, including junctions composed of a single molecule and self-assembled monolayers (SAMs) of molecules, and new opportunities in optical sensing at the single-molecule level. We focus our attention on describing the experimental design, key phenomena, and the underlying mechanisms. Specifically, topics presented include light-assisted charge transport, photoswitch, and photoemission in MJs. Emerging Raman sensing in MJs is also discussed. Finally, outstanding challenges are explored, and future perspectives in the field are provided.

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19

Zhang, Shuai, Kaihua Liu, Yunlei Zhang, and Ya Wang. "A Coarse Fingerprint-Assisted Multiple Target Indoor Device-Free Localization With Visible Light Sensing." IEEE Sensors Journal 22, no. 2 (January 15, 2022): 1461–73. http://dx.doi.org/10.1109/jsen.2021.3130711.

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20

Rani, Deepika, Kuldeep Kumar Bhasin, and Monika Singh. "Visible-Light-Assisted Gasochromic Sensing of Nicotine from Cigarette Smoke by Metal-Organic Nanotube." ACS Materials Letters 2, no. 1 (November 21, 2019): 9–14. http://dx.doi.org/10.1021/acsmaterialslett.9b00314.

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21

Zhai, Jiali, Tao Wang, Chuang Wang, and Dechen Liu. "UV-light-assisted ethanol sensing characteristics of g-C3N4/ZnO composites at room temperature." Applied Surface Science 441 (May 2018): 317–23. http://dx.doi.org/10.1016/j.apsusc.2018.02.026.

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22

Hasani, Amirhossein, Hamed Sharifi Dehsari, Ali Amiri Zarandi, Alireza Salehi, Faramarz Afshar Taromi, and Hanif Kazeroni. "Visible Light-Assisted Photoreduction of Graphene Oxide Using CdS Nanoparticles and Gas Sensing Properties." Journal of Nanomaterials 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/930306.

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Graphene oxide sheets suspended in ethanol interact with excited CdS nanoparticles and contributed to photocatalytic reduction by accepting electron from nanoparticle. The UV-Vis measurement showed that electrical absorbance of the CdS/graphene oxide sheets increased by decreasing the irradiation time and after 2 h it remained constant which indicates the optimum reduction time. Furthermore, the direct interaction between CdS nanoparticles and graphene sheets hinders the collapse of exfoliated sheets of graphene. The 4-point probe measurement of nanocomposite with different ratios of graphene oxide in CdS solution after irradiation shows that the conductivity of them increased by increasing the amount of GO, but further increasing causes incomplete photo reduction process due to exorbitance increasing GO sheets which contribute to decreasing the conductivity. The CdS/RGO composite material can be used as a gas sensor for CO2based on its electrocatalytic behavior. The low-cost and easy fabrication sensor shows rapid response and high sensitivity. By varying the amount of GO the optimum concentration which shows high sensitivity is found and its good performance compared with other is attributed to its higher conductivity due to complete reduction. Moreover, the effects of thermal annealing on the conductivity of CdS/RGO film and the performance of devices are researched.

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23

Zhao, Ji-Hong, Chun-Hao Li, Qi-Dai Chen, and Hong-Bo Sun. "Femtosecond Laser Direct Writing Assisted Nonequilibriumly Doped Silicon n+-p Photodiodes for Light Sensing." IEEE Sensors Journal 15, no. 8 (August 2015): 4259–63. http://dx.doi.org/10.1109/jsen.2015.2414953.

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24

Shu, Fangjie, Xuefeng Jiang, Guangming Zhao, and Lan Yang. "A scatterer-assisted whispering-gallery-mode microprobe." Nanophotonics 7, no. 8 (July 17, 2018): 1455–60. http://dx.doi.org/10.1515/nanoph-2018-0063.

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AbstractA fiber-based whispering-gallery-mode (WGM) microprobe, combining both the high optical field enhancement of the WGMs and the compact structure of the optical fiber, is highly desired for sensing and imaging. Here we report a WGM microsphere resonator coupled to a single-mode fiber interfaced by a graded-index lens. By scattering a focused laser beam through a nano-scatterer, with the help of a two-step focusing technique as well as Purcell effects, the efficient far-field coupling of WGMs with an efficiency as high as 16.8% has been demonstrated in our system. With the feature of both input and output of the probe light propagating along the same fiber, such a scatterer-assisted WGM microprobe will serve as a convenient tool for sensing/imaging applications.

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25

Fan, Huibo, Dawei Zhou, Li Fan, Yuanyan Wu, Hao Tao, and Junbin Gong. "Excitation of Multi-Beam Interference and Whispering-Gallery Mode in Silica Taper-Assisted Polymer Microspheres for Refractometric Sensing." Photonics 8, no. 4 (April 10, 2021): 117. http://dx.doi.org/10.3390/photonics8040117.

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We propose and numerically analyze a fiber-optic sensor based on a silica taper-assisted multiple polymer microspheres to realize high-sensitivity refractometric sensing due to the excitation of multi-beam interference and whispering-gallery modes (WGMs) in each microsphere. Up to 5 UV-cured adhesive microspheres are dripped in sequence on the 2 µm-diameter silica taper with the certain distances in between. Scattering and reflection of light in each microsphere enhance the multi-beam interference because of the emergence of high-order modes. Moreover, WGMs with certain resonant wavelengths are excited in the microspheres, further enhancing the transmission spectrum with high contrast and quality factor. Furthermore, irregular transmission spectrum corresponds to the large wavelength tuning range. Propagating light between the microspheres could be strongly affected by the environmental factor with the large transmission spectrum shift, therefore realizing the refractometric sensing with high sensitivity of 846 nm/RIU based on the taper-assisted 2-spheres sensor. Furthermore, another two microspheres are placed on both sides of 2-spheres sensor to form 4-spheres-loop sensor, re-collecting those large-angle scattering light with the enhancement of multi-beam interference and WGMs. Therefore, the sensitivity of 4-shperes-loop sensor is further improved to the maximum of 1296.3 nm/RIU.

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26

Wang, Zhongming, Kun Wang, Xiaoying Peng, Qiang Geng, Xun Chen, Wenxin Dai, Xianzhi Fu, and Xuxu Wang. "Comparative study of ultraviolet light and visible light on the photo-assisted conductivity and gas sensing property of TiO2." Sensors and Actuators B: Chemical 248 (September 2017): 724–32. http://dx.doi.org/10.1016/j.snb.2017.04.058.

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27

Silva, R. A., and M. O. Orlandi. "Influence of Synthesis Route on the Radiation Sensing Properties of ZnO Nanostructures." Journal of Nanomaterials 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/4054058.

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ZnO nanostructures were synthesized using two different routes and the light sensor response of structures was studied. The synthesis by carbothermal reduction resulted in ZnO tetrapods while the synthesis by microwave assisted hydrothermal method produced multipoint stars structures. Characterization by scanning and transmission electron microscopy confirmed that both structures consist of one-dimensional crystals with a hexagonal cross section and[001]growth direction. Under a simulated solar radiation spectrum, it was observed that tetrapods display a light sensor response of approximately 5000. For the multipoint stars, a maximum in the sensor signal value of 3400 was achieved, which also represents a substantial variation in the conductivity of the material. A model based on the surface oxygen presence is proposed to explain the observed results.

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28

Huang, Hung Ji, Ming-Hua Shiao, Yang-Wei Lin, Bei-Ju Lin, James Su, Yung-Sheng Lin, and Han-Wei Chang. "Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing." Nanomaterials 11, no. 7 (June 30, 2021): 1736. http://dx.doi.org/10.3390/nano11071736.

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The effects of Au cores in Ag shells in enhancing surface-enhanced Raman scattering (SERS) were evaluated with samples of various Au/Ag ratios. High-density Ag shell/Au core dendritic nanoforests (Au@Ag-DNFs) on silicon (Au@Ag-DNFs/Si) were synthesized using the fluoride-assisted Galvanic replacement reaction method. The synthesized Au@Ag-DNFs/Si samples were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, reflection spectroscopy, X-ray diffraction, and Raman spectroscopy. The ultraviolet-visible extinction spectrum exhibited increased extinction induced by the addition of Ag when creating the metal DNFs layer. The pure Ag DNFs exhibited high optical extinction of visible light, but low SERS response compared with Au@Ag DNFs. The Au core (with high refractive index real part) in Au@Ag DNFs maintained a long-leaf structure that focused the illumination light, resulting in the apparent SERS enhancement of the Ag coverage.

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29

Han, Lina, DeJun Wang, Yongchun Lu, Tengfei Jiang, Bingkun Liu, and Yanhong Lin. "Visible-Light-Assisted HCHO Gas Sensing Based on Fe-Doped Flowerlike ZnO at Room Temperature." Journal of Physical Chemistry C 115, no. 46 (October 28, 2011): 22939–44. http://dx.doi.org/10.1021/jp206352u.

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30

Lin, Wei, Zhichen Xiao, Wenyun Zhou, Mengjiao Ren, and Zhiwei Zheng. "Graphene-Assisted Goos–Hänchen Shift in a Planar Multilayer Configuration in the Visible Light Range." Advances in Condensed Matter Physics 2020 (December 15, 2020): 1–6. http://dx.doi.org/10.1155/2020/8822273.

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In this paper, the graphene-assisted Goos–Hänchen (GH) shift of the optical beam reflected from a planar multilayer configuration is investigated. The increased positive Goos–Hänchen shifts can be modulated by adjusting the Fermi energy due to graphene with unique optical properties in the visible light range. Moreover, the GH shift can be tuned by varying the layers of graphene, the thickness of the medium, incident wavelength, and so on. These results will be useful for designing the novel graphene-based optical sensing and switching.

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31

Junaid, Muhammad, M. H. Md Khir, Gunawan Witjaksono, Nelson Tansu, Mohamed Shuaib Mohamed Saheed, Pradeep Kumar, Zaka Ullah, Asfand Yar, and Fahad Usman. "Boron-Doped Reduced Graphene Oxide with Tunable Bandgap and Enhanced Surface Plasmon Resonance." Molecules 25, no. 16 (August 11, 2020): 3646. http://dx.doi.org/10.3390/molecules25163646.

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Graphene and its hybrids are being employed as potential materials in light-sensing devices due to their high optical and electronic properties. However, the absence of a bandgap in graphene limits the realization of devices with high performance. In this work, a boron-doped reduced graphene oxide (B-rGO) is proposed to overcome the above problems. Boron doping enhances the conductivity of graphene oxide and creates several defect sites during the reduction process, which can play a vital role in achieving high-sensing performance of light-sensing devices. Initially, the B-rGO is synthesized using a modified microwave-assisted hydrothermal method and later analyzed using standard FESEM, FTIR, XPS, Raman, and XRD techniques. The content of boron in doped rGO was found to be 6.51 at.%. The B-rGO showed a tunable optical bandgap from 2.91 to 3.05 eV in the visible spectrum with an electrical conductivity of 0.816 S/cm. The optical constants obtained from UV-Vis absorption spectra suggested an enhanced surface plasmon resonance (SPR) response for B-rGO in the theoretical study, which was further verified by experimental investigations. The B-rGO with tunable bandgap and enhanced SPR could open up the solution for future high-performance optoelectronic and sensing applications.

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Xu, Haoyuan, Jianzhong Li, Peidong Li, Junjie Shi, Xuanwen Gao, and Wenbin Luo. "Highly Efficient SO₂ Sensing by Light-Assisted Ag/PANI/SnO₂ at Room Temperature and the Sensing Mechanism." ACS Applied Materials & Interfaces 13, no. 41 (October 6, 2021): 49194–205. http://dx.doi.org/10.1021/acsami.1c14548.

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Borodaenko, Yulia, Stanislav Gurbatov, Mikhail Tutov, Alexey Zhizhchenko, Sergei A. Kulinich, Aleksandr Kuchmizhak, and Aleksandr Mironenko. "Direct Femtosecond Laser Fabrication of Chemically Functionalized Ultra-Black Textures on Silicon for Sensing Applications." Nanomaterials 11, no. 2 (February 4, 2021): 401. http://dx.doi.org/10.3390/nano11020401.

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Here, we present the single-step laser-assisted fabrication of anti-reflective hierarchical surface textures on silicon locally functionalized with a photoluminescent (PL) molecular nanolayer. Using femtosecond-laser ablation of commercial crystalline Si wafers placed under a layer of a solution containing rhodamine 6G (R6G) a triethoxysilyl derivative, we fabricated ordered arrays of microconical protrusions with self-organized nanoscale surface morphology. At the same time, the laser-induced temperature increase facilitated surface activation and local binding of the R6G derivative to the as-fabricated nanotextured surface. The produced dual-scale surface textures showed remarkable broadband (visible to near-IR) light-absorbing properties with an averaged reflectivity of around 1%, and the capping molecular nanolayer demonstrated a strongly enhanced PL yield. By performing a pH sensing test using the produced nanotextured substrate, we confirmed the retention of sensory properties of the molecules attached to the surface and validated the potential applicability of the high-performing liquid-assisted laser processing as a key technology for the development of innovative multifunctional sensing devices in which the textured substrate (e.g., ultra-black semiconductor) plays a dual role as a support and PL signal amplifier.

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34

Junaid, Muhammad, M. H. Md Khir, Gunawan Witjaksono, Zaka Ullah, Nelson Tansu, Mohamed Shuaib Mohamed Saheed, Pradeep Kumar, Lee Hing Wah, Saeed Ahmed Magsi, and Muhammad Aadil Siddiqui. "A Review on Graphene-Based Light Emitting Functional Devices." Molecules 25, no. 18 (September 14, 2020): 4217. http://dx.doi.org/10.3390/molecules25184217.

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In recent years, the field of nanophotonics has progressively developed. However, constant demand for the development of new light source still exists at the nanometric scale. Light emissions from graphene-based active materials can provide a leading platform for the development of two dimensional (2-D), flexible, thin, and robust light-emitting sources. The exceptional structure of Dirac’s electrons in graphene, massless fermions, and the linear dispersion relationship with ultra-wideband plasmon and tunable surface polarities allows numerous applications in optoelectronics and plasmonics. In this article, we present a comprehensive review of recent developments in graphene-based light-emitting devices. Light emissions from graphene-based devices have been evaluated with different aspects, such as thermal emission, electroluminescence, and plasmons assisted emission. Theoretical investigations, along with experimental demonstration in the development of graphene-based light-emitting devices, have also been reviewed and discussed. Moreover, the graphene-based light-emitting devices are also addressed from the perspective of future applications, such as optical modulators, optical interconnects, and optical sensing. Finally, this review provides a comprehensive discussion on current technological issues and challenges related to the potential applications of emerging graphene-based light-emitting devices.

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35

Yang, Yong, Wufei Gong, Xin Li, Yuan Liu, Yan Liang, Bin Chen, Yanxing Yang, Xingfang Luo, Keng Xu, and Cailei Yuan. "Light-assisted room temperature gas sensing performance and mechanism of direct Z-scheme MoS2/SnO2 crystal faceted heterojunctions." Journal of Hazardous Materials 436 (August 2022): 129246. http://dx.doi.org/10.1016/j.jhazmat.2022.129246.

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36

Punetha, Deepak, and Saurabh Kumar Pandey. "Enhancement and Optimization in Sensing Characteristics of Ammonia Gas Sensor Based on Light Assisted Nanostructured WO3 Thin Film." IEEE Sensors Journal 20, no. 24 (December 15, 2020): 14617–23. http://dx.doi.org/10.1109/jsen.2020.3009661.

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37

Xu, Zhiyang, Junhua Tong, Xiaoyu Shi, Jinxiang Deng, and Tianrui Zhai. "Tailoring Whispering Gallery Lasing and Random Lasing in A Compound Cavity." Polymers 12, no. 3 (March 13, 2020): 656. http://dx.doi.org/10.3390/polym12030656.

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A compound cavity was proposed to achieve both whispering gallery mode (WGM) lasing and random lasing. The WGM-random compound cavity consisted of a random structure with an annular boundary, which was fabricated by a method combining both inkjet printing and metal-assisted chemical etching methods. An ultrathin polymer membrane was attached to the WGM-random compound cavity, forming a polymer laser device. A transformation from WGM lasing to random lasing was observed under optical pumping conditions. The laser performance could be easily tailored by changing the parameter of the WGM-random compound cavity. These results provide a new avenue for the design of integrated light sources for sensing applications.

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Elakia, Manoharan, Marappan Gobinath, Yuvaraj Sivalingam, Elumalai Palani, Soumyajit Ghosh, Venkatramaiah Nutalapati, and Velappa Jayaraman Surya. "Investigation on visible light assisted gas sensing ability of multi-walled carbon nanotubes coated with pyrene based organic molecules." Physica E: Low-dimensional Systems and Nanostructures 124 (October 2020): 114232. http://dx.doi.org/10.1016/j.physe.2020.114232.

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Ji, Ye, Yong Zhang, Ziying Wang, and Tong Zhang. "Infrared light-assisted preparation of Ag nanoparticles-reduced graphene oxide nanocomposites for non-enzymatic H 2 O 2 sensing." Materials Research Bulletin 72 (December 2015): 184–87. http://dx.doi.org/10.1016/j.materresbull.2015.07.025.

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Tran, Toan Trong, Blake Regan, Evgeny A. Ekimov, Zhao Mu, Yu Zhou, Wei-bo Gao, Prineha Narang, et al. "Anti-Stokes excitation of solid-state quantum emitters for nanoscale thermometry." Science Advances 5, no. 5 (May 2019): eaav9180. http://dx.doi.org/10.1126/sciadv.aav9180.

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Color centers in solids are the fundamental constituents of a plethora of applications such as lasers, light-emitting diodes, and sensors, as well as the foundation of advanced quantum information and communication technologies. Their photoluminescence properties are usually studied under Stokes excitation, in which the emitted photons are at a lower energy than the excitation ones. In this work, we explore the opposite anti-Stokes process, where excitation is performed with lower-energy photons. We report that the process is sufficiently efficient to excite even a single quantum system—namely, the germanium-vacancy center in diamond. Consequently, we leverage the temperature-dependent, phonon-assisted mechanism to realize an all-optical nanoscale thermometry scheme that outperforms any homologous optical method used to date. Our results frame a promising approach for exploring fundamental light-matter interactions in isolated quantum systems and harness it toward the realization of practical nanoscale thermometry and sensing.

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Maghsoodi, M. O., A. Kazemi, A. Hedayati Aghmashadi, and M. R. Gili. "SURVEY OF LIGHT POLLUTION OF ARAK CITY BY USING OF DMSP AND SUONI-NPP SATELLITE IMAGERY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W18 (October 18, 2019): 693–96. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w18-693-2019.

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Abstract. Today, the use of remote sensing techniques and satellite images of night lights has immensely assisted in investigating this kind of pollution. The objectives of this research is to survey the light pollution of the city of Arak in Iran for the years 1997 and 2009, by utilizing satellite images of DMSP night lights and for the years 2013 through 2018, by taking advantage of Soumi-NPP satellite images of night lights and exploring its connection to the city’s electricity power consumption for street lighting. The night light images of the DMSP and NPP satellites, depending on the degree of light intensity, were each, in segregation, categorized into five classes of light pollution levels, ranging from very high to very low levels. Next, light pollution maps were extracted from classified images and then the connection of the ‘high and very high’ classes of light pollution with electric power consumption for street or road lighting was surveyed in these years. Results of the study indicates that the amount of light pollution in these years was in relevance with road or street lighting, as in the years when the amount of electricity consumption for road lighting was high and its role in connection with light pollution was also in great percentages; and in years with a decrease in electricity consumption for road lighting, lower percentages were displayed.

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Ramalingam, R. Jothi, and G. Dinesh. "Synthesis, Structural and Sensor Characterization of Ga-ZnO Nanodisk/Nanorods Prepared by One Step Polymer Assisted Hydrothermal Process on AlN/Si Substrate." Materials Science Forum 756 (May 2013): 251–58. http://dx.doi.org/10.4028/www.scientific.net/msf.756.251.

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Synthesis and characterization of Ga-doped ZnO nanodisk and the formation of nanodisk/nanorod hybrid morphologies on AlN/Si substrate by polymer assisted one-pothydrothermal process have been studied. The morphology and structural properties were determined by field emission scanning electron microscopy (FESEM) and X-ray diffraction techniques. FESEM images clearly confirm the pure nanodisk formation for Ga-ZnO(0.5) at optimized ZnO concentration and hybrid nanodisk/nanorod formation obtained for Ga-ZnO (0.2) at lower ZnO concentration. The pure Ga-ZnO (0.5) nanodisk on AlN/Si thin film substrate showed effective response and fast recovery time towards UV light sensing in dark condition compared to low concentration route preparedGa-ZnO (0.2)/AlN/Si sample.

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Sarkar, P., N. Nandi, N. Barnwal, and K. Sahu. "Mercaptopropionic acid-assisted synthesis of green and blue emissive copper nanoclusters for multimodal sensing, logic gate, and white light applications." Materials Today Chemistry 27 (January 2023): 101341. http://dx.doi.org/10.1016/j.mtchem.2022.101341.

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Xiao, Min, Yanwei Li, Bo Zhang, Guang Sun, and Zhanying Zhang. "Synthesis of g-C3N4-Decorated ZnO Porous Hollow Microspheres for Room-Temperature Detection of CH4 under UV-Light Illumination." Nanomaterials 9, no. 11 (October 23, 2019): 1507. http://dx.doi.org/10.3390/nano9111507.

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UV light-assisted gas sensors based on metal oxide semiconductor (MOS) have attracted much attention in detecting flammable and explosive gases at room temperature. In this paper, graphite-based carbon nitride (g-C3N4) nanosheets-decorated ZnO porous hollow microspheres (PHMSs) with the size about 3~5 μm in diameter were successfully synthesized by annealing the solvothermally-synthesized Zn5(CO3)2(OH)6 PHMSs together with g-C3N4. The synthesized samples were characterized by XRD, SEM, TEM, FT-IR and XPS. The results indicated that the prepared g-C3N4/ZnO PHMSs were constructed by numerous loosely stacked ZnO nanoparticles of 20~30 nm in diameter. Gas sensing tests indicated that under UV light (365~385 nm) illumination, the sensors fabricated with g-C3N4/ZnO HPMSs showed an enhanced response and faster response speed than the pure ZnO counterpart at room temperature. In addition, the g-C3N4/ZnO sensor also exhibited good repeatability and long-term stability for CH4 detection.

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Salem, Ziad, and Andreas Peter Weiss. "Improved Spatiotemporal Framework for Human Activity Recognition in Smart Environment." Sensors 23, no. 1 (December 23, 2022): 132. http://dx.doi.org/10.3390/s23010132.

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The rapid development of microsystems technology with the availability of various machine learning algorithms facilitates human activity recognition (HAR) and localization by low-cost and low-complexity systems in various applications related to industry 4.0, healthcare, ambient assisted living as well as tracking and navigation tasks. Previous work, which provided a spatiotemporal framework for HAR by fusing sensor data generated from an inertial measurement unit (IMU) with data obtained by an RGB photodiode for visible light sensing (VLS), already demonstrated promising results for real-time HAR and room identification. Based on these results, we extended the system by applying feature extraction methods of the time and frequency domain to improve considerably the correct determination of common human activities in industrial scenarios in combination with room localization. This increases the correct detection of activities to over 90% accuracy. Furthermore, it is demonstrated that this solution is applicable to real-world operating conditions in ambient light.

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Meng, Zhaozong, Mingxing Zhang, Changxin Guo, Qirui Fan, Hao Zhang, Nan Gao, and Zonghua Zhang. "Recent Progress in Sensing and Computing Techniques for Human Activity Recognition and Motion Analysis." Electronics 9, no. 9 (August 21, 2020): 1357. http://dx.doi.org/10.3390/electronics9091357.

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The recent scientific and technical advances in Internet of Things (IoT) based pervasive sensing and computing have created opportunities for the continuous monitoring of human activities for different purposes. The topic of human activity recognition (HAR) and motion analysis, due to its potentiality in human–machine interaction (HMI), medical care, sports analysis, physical rehabilitation, assisted daily living (ADL), children and elderly care, has recently gained increasing attention. The emergence of some novel sensing devices featuring miniature size, a light weight, and wireless data transmission, the availability of wireless communication infrastructure, the progress of machine learning and deep learning algorithms, and the widespread IoT applications has promised new opportunities for a significant progress in this particular field. Motivated by a great demand for HAR-related applications and the lack of a timely report of the recent contributions to knowledge in this area, this investigation aims to provide a comprehensive survey and in-depth analysis of the recent advances in the diverse techniques and methods of human activity recognition and motion analysis. The focus of this investigation falls on the fundamental theories, the innovative applications with their underlying sensing techniques, data fusion and processing, and human activity classification methods. Based on the state-of-the-art, the technical challenges are identified, and future perspectives on the future rich, sensing, intelligent IoT world are given in order to provide a reference for the research and practices in the related fields.

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Lakshmanan, Karthikeyan, Akshaya Mouly Vijayakumari, and Palash Kumar Basu. "Reliable and Flow Independent Hydrogen Sensor Based on Microwave-Assisted ZnO Nanospheres: Improved Sensing Performance Under UV Light at Room Temperature." IEEE Sensors Journal 18, no. 5 (March 1, 2018): 1810–19. http://dx.doi.org/10.1109/jsen.2017.2788404.

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Arcadio, Francesco, Mimimorena Seggio, Domenico Del Prete, Gionatan Buonanno, João Mendes, Luís C. C. Coelho, Pedro A. S. Jorge, Luigi Zeni, Alessandra Maria Bossi, and Nunzio Cennamo. "A Plasmonic Biosensor Based on Light-Diffusing Fibers Functionalized with Molecularly Imprinted Nanoparticles for Ultralow Sensing of Proteins." Nanomaterials 12, no. 9 (April 19, 2022): 1400. http://dx.doi.org/10.3390/nano12091400.

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Plasmonic bio/chemical sensing based on optical fibers combined with molecularly imprinted nanoparticles (nanoMIPs), which are polymeric receptors prepared by a template-assisted synthesis, has been demonstrated as a powerful method to attain ultra-low detection limits, particularly when exploiting soft nanoMIPs, which are known to deform upon analyte binding. This work presents the development of a surface plasmon resonance (SPR) sensor in silica light-diffusing fibers (LDFs) functionalized with a specific nanoMIP receptor, entailed for the recognition of the protein human serum transferrin (HTR). Despite their great versatility, to date only SPR-LFDs functionalized with antibodies have been reported. Here, the innovative combination of an SPR-LFD platform and nanoMIPs led to the development of a sensor with an ultra-low limit of detection (LOD), equal to about 4 fM, and selective for its target analyte HTR. It is worth noting that the SPR-LDF-nanoMIP sensor was mounted within a specially designed 3D-printed holder yielding a measurement cell suitable for a rapid and reliable setup, and easy for the scaling up of the measurements. Moreover, the fabrication process to realize the SPR platform is minimal, requiring only a metal deposition step.

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Li, Gang, and Guoheng Ren. "Wearable Power Assistant Robot Sensor Signal Prediction Algorithm and Controller Design." Applied Bionics and Biomechanics 2022 (May 14, 2022): 1–11. http://dx.doi.org/10.1155/2022/4605389.

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The wearable power-assisted robot is a typical auxiliary rehabilitation robot. It is an exoskeleton power-assisted device that helps people to expand their lower limb movement capabilities. Its basic principle is to obtain the motion intention information of the human body through the perception system. Control the DC servo motor installed at the hip joint and the knee joint to drive the movement of the link, so as to achieve the purpose of providing assistance to the human body. In order to improve the dynamic response frequency of the wearable robotic perception system, a sensor signal based on time series analysis is proposed. The online prediction algorithm, which can perform single-step or multistep prediction under the premise of ensuring certain accuracy, can multiply the dynamic response frequency of the wearable-assisted robot sensing system to ensure the real-time performance of the whole system. In order to realize the sensor signal prediction algorithm, we design the corresponding software and hardware system to realize the prediction algorithm. The whole sensor signal prediction algorithm implementation system can be divided into two parts: lower computer and upper computer. The lower computer includes amplification circuit, signal conditioning circuit, and acquisition. The signal processing software part of the circuit and the corresponding MCU and the upper computer mainly include the data acquisition and prediction algorithm implementation, and the upper computer adopts the mixed programming technology of Vc++ and MATLAB to complete the software part of the upper computer. Aiming at the control part of the wearable robotic sensing system, the first generation of DC servo motor embedded motion controller is designed. The motion controller adopts the design concept of embedded motion controller, which has small size, is light weight, and has good expandability. And the motion controller can communicate and debug with the host computer through the serial port, which lays a foundation for the design of the entire embedded control system.

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Arias, Abraham, Nicola Nedev, Susmita Ghose, Juan Salvador Rojas-Ramirez, David Mateos, Mario Curiel Alvarez, Oscar Pérez, Mariel Suárez, Benjamin Valdez-Salas, and Ravi Droopad. "Structural, Optical, and Electrical Characterization of β-Ga2O3 Thin Films Grown by Plasma-Assisted Molecular Beam Epitaxy Suitable for UV Sensing." Advances in Materials Science and Engineering 2018 (2018): 1–6. http://dx.doi.org/10.1155/2018/9450157.

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β-Ga2O3 thin films were grown on c-plane sapphire substrates by plasma-assisted molecular beam epitaxy. The films were grown using an elemental gallium source and oxygen supplied by an RF plasma source. Reflection high-energy electron diffraction (RHEED) was used to monitor the surface quality in real time. Both in situ RHEED and ex situ X-ray diffraction confirmed the formation of single crystal β-phase films with excellent crystallinity on c-plane sapphire. Spectroscopic ellipsometry was used to determine the film thicknesses, giving values in the 11.6–18.8 nm range and the refractive index dispersion curves. UV-Vis transmittance measurements revealed that strong absorption of β-Ga2O3 starts at ∼270 nm. Top metal contacts were deposited by thermal evaporation for I-V characterization, which has been carried out in dark, as well as under visible and UV light illumination. The optical and electrical measurements showed that the grown thin films of β-Ga2O3 are excellent candidates for deep-ultraviolet detection and sensing.

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