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Dissertations / Theses on the topic 'Gadolinium doped quantum dots'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Li, Zizhen. "Synthesizing Multimodal Imaging Probes and Their Application in Non-Invasive Axonal Tracing by Magnetic Resonance Imaging." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34414.

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Imaging techniques have become much more in demand in modern medicine, especially in fields of disease prognosis, diagnosis and therapeutics. This is because a better understanding of different diseases, characteristics of each patient and further optimizing treatment planning, are all enhanced by advanced imaging techniques. Since each imaging modality has its own merits and intrinsic limitations, combining two or more complementary imaging modalities has become an interesting research area. In this study, gadolinium (Gd3+) doped CdTe quantum dots (QDs) were synthesized and used as multimoda

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Tuinenga, Christopher J. "Indium, tin, and gallium doped CdSe quantum dots." Diss., Kansas State University, 2011. http://hdl.handle.net/2097/10745.

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Doctor of Philosophy<br>Department of Chemistry<br>Viktor Chikan<br>Doping quantum dots to increase conductivity is a crucial step towards being able to fabricate a new generation of electronic devices built on the “bottom-up” platform that are smaller and more efficient than currently available. Indium, tin, and gallium have been used to dope CdSe in both the bulk and thin film regimes and introduce n-type electron donation to the conduction band. CdSe quantum dots have been successfully doped with indium, tin, and gallium using the Li4[Cd10Se4(SPh16)] single source precursor combined wi

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Bray, Tommaso. "Synthesis and Characterization of Quantum Dots doped Polymer Nanocomposites." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Lo studio tratterà la creazione e caratterizzazione di polimeri nanoadditivati con quantum-dots per applicazioni nel campo delle alte tensioni. Il principale scopo del lavoro sarà valutare in che modo la presenza di quantum-dots, additivi di dimensione nanometrica con struttura di tipo core-shell, modifichi alcune proprietà termiche ed elettriche del materiale base, quali ad esempio la trasmissione del calore, l’accumulo di carica di spazio e la resistenza alla sollecitazione elettrica, in modo da migliorare le prestazioni del materiale base per le applicazioni industriali. In particolare, l’a

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Cesari, Valentina. "Ultrafast carrier dynamics in P doped InGaAs GaAs quantum dots." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/54834/.

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In this PhD project the effect of p doping on the carrier dynamics in InGaAs quantum dot amplifiers emitting near 1.3/mi at room temperature has been investigated by transient differential transmission spectroscopy (DTS) and four-wave mixing (FWM) experiments in a heterodyne detection scheme. From DTS experiments, an absorption bleaching on the order of few hundreds of ps and an ultrafast gain recovery were measured at operating condition, i.e. room temperature and with current injection. The faster absorption bleaching recovery observed in p doped amplifiers has been attributed to the carrier

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Raevskaya, Alexandra, Oksana Rozovik, Anastasiya Novikova, et al. "Luminescence and photoelectrochemical properties of size-selected aqueous copper-doped Ag–In–S quantum dots." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-235077.

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Ternary luminescent copper and silver indium sulfide quantum dots (QDs) can be an attractive alternative to cadmium and lead chalcogenide QDs. The optical properties of Cu–In–S and Ag–In–S (AIS) QDs vary over a broad range depending on the QD composition and size. The implementation of ternary QDs as emitters in bio-sensing applications can be boosted by the development of mild and reproducible syntheses directly in aqueous solutions as well as the methods of shifting the photoluminescence (PL) bands of such QDs as far as possible into the near IR spectral range. In the present work, the coppe

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Hackmann, Johannes [Verfasser], Frithjof [Akademischer Betreuer] Anders, and Götz Silvester [Gutachter] Uhrig. "Spin dynamics in doped semiconductor quantum dots / Johannes Hackmann. Betreuer: Frithjof Anders. Gutachter: Götz Silvester Uhrig." Dortmund : Universitätsbibliothek Dortmund, 2015. http://d-nb.info/1111638802/34.

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7

Fardad, Mohammad Ali. "Fabrication of sol-gel silica-on-silicon waveguides doped with semiconductor quantum dots for integrated optics." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307565.

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8

Archer, Paul I. "Building on the hot-injection architecture : giving worth to alternative nanocrystal syntheses /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/8520.

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9

Fröhling, Nina [Verfasser], Frithjof [Akademischer Betreuer] Anders, and Mikhail [Gutachter] Glazov. "Fourth-order spin correlation in doped semi-conductor quantum dots / Nina Fröhling ; Gutachter: Mikhail Glazov ; Betreuer: Frithjof Anders." Dortmund : Universitätsbibliothek Dortmund, 2019. http://d-nb.info/1188464914/34.

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Liu, William K. "Electron spin dynamics in quantum dots, and the roles of charge transfer excited states in diluted magnetic semiconductors /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/8588.

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Geszke-Moritz, Malgorzata. "Synthesis of stable and non-cadmium containing quantum dots conjugated with folic acid for imaging of cancer cells." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL066N/document.

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Les Quantum Dots (QDs) sont des particules cristallines de semi-conducteur ou du métal de forme sphérique et de dimension nanométrique. L'intérêt majeur des QDs réside dans leur grande adaptabilité à de nombreuses applications biologiques.Le but de mon travail était de développer une nouvelle classe de QDs de faible toxicité afin de les utiliser pour la bio-imagerie des cellules cancéreuses. Pour cela, il est nécessaire de préparer des sondes hydrosolubles, photostables, biocompatibles, de luminescence élevée et possédant une faible toxicité. La synthèse des cœurs de type ZnS and ZnSe dopés au

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Intronati, Guido Alfredo. "Relaxation de spin dans les semi-conducteurs dopés et dans les nanostructures à base de semi-conducteurs." Phd thesis, Université de Strasbourg, 2013. http://tel.archives-ouvertes.fr/tel-01067064.

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Dans cette thèse nous considérons un semi-conducteur de GaAs dopé, où nous étudions la relaxation du spin du côté métallique de la transition metal-isolant. Nous considérons deux types différents d'interaction de spin-orbite. Le premier d'entre eux est associé aux impuretés et l'autre est de type Dresselhaus. La dynamique du spin est traitée à travers une formulation analytique basée sur la diffusion du spin de l'électron, et un calcul numérique de la durée de vie du spin.Ensuite, nous considérons une boîte quantique hébergée dans un nanofil de matériau InAs (avec une structure cristalline de

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Hsu, Chi-Hsiu, and 許齊修. "P- doped Ge quantum dots infrared photodetector." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/64446670494337617929.

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碩士<br>國立臺灣大學<br>電機工程學研究所<br>89<br>Ge quantum dot infrared photodetectors are predicted to have some advantages, such as exhibiting a lower dark current and increasing carrier capture and relaxation time, over conventional quantum infrared photodetectors. While most quantum well infrared photodetectors only weakly response normal incident light, the photoresponse of a Ge QDIP is expected to be sensitive to the normal incident light. In addition, because Ge dots can be grown on a Silicon substrate, Ge QDIPs also provide us a way of the monolithic integration between the detectors and the readou

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Yu, Jhe-Wei, and 余哲緯. "Synthesis of Heterostructure and Transition Metal Doped Quantum Dots." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/22085609257468701967.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>102<br>In this work, we have successfully synthesized the heterostructure quantum dots (HNS QDs) by the preformed seeded approaches. Cu2S or Ag2S nanocrystals was utilized as the seed crystals in the synthesis process of HNS QDs, and the secondary cation ion precursor was introduced into the preformed seed solution, followed by the cation exchange reaction. A number of capping agents have demonstrated good surface modification for the preparation of QDs. For example, capping agents could reduce the surface trap sites of QDs, avoid QDs’ aggregation and so on. For thes

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Hong, Shou-Bang, and 洪壽邦. "Aqueous synthesis of Ga-doped CuInSe2 quantum dots and its application in quantum dots sensitized solar cell." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/za246x.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>105<br>In this study, we demonstrated the synthesis of CuInSe2 (CISe) quantum dots (QDs) by microwave-assisted method in aqueous phase for quantum dots sensitized solar cells (QDSSCs). The CISe QDs were synthesized by the rapid reaction of low-toxic metal precursors and short-chain bi-functional molecules in the absence of organic solvents. Compared to traditional hot-injection and heating-up methods by using of organic solvents, aqueous synthesis has advantages of rapid, simple, and environmentally friendly. This research was divided into two parts. The first part w

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Jia-HengDai and 戴嘉恆. "All-inorganic perovskite quantum dots doped cholesteric liquid crystal laser." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/rg2d8a.

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碩士<br>國立成功大學<br>光電科學與工程學系<br>106<br>This work demonstrated for the first time an highly efficient all-inorganic perovskite quantum dots doped CLC (AIPQD-CLC) laser. The AIPQD material as an efficient optical gain medium in the optical resonator of the CLC planar texture can be obtained by pre-underdoing a low-cost solvothermal process.. Experimental results show that the AIPQD lattice structure corresponds to the black orthorhombic phase of CsSnI3 perovskite. The ge value and linewidth of the lasing signal from the AIPQD-CLC laser measured are around 1.8 and 0.21 nm, respectively. The aggregat

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Cheng, Min-Chiang, and 鄭閔強. "Analysis of negative photoconductivity in DETA-doped MoS2 quantum dots." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/k66629.

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碩士<br>國立交通大學<br>電子物理系所<br>106<br>bdenum disulfide (MoS2) QDs MoS2 QDs are less explored compared to its other counterparts. Considering the possible applications that can be offered by MoS2 quantum dots, It is of importance to further understand it. Here, PLA was used in the fabrication of both pristine and DETA-doped MoS2 QDs. The particle size and elemental analysis of DETA doped MoS2 QDs using TEM and XPS measurements confirm the success of DETA doping to the MoS2 QDs. The photo-excitation spectroscopy and absorption spectroscopy validate and showed excellent optical properties for the DETA

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CHIANG, YA-HAN, and 江雅涵. "Aqueous synthesis of Mn-doped Cu-In-S quantum dots and its application in quantum dots-sensitized solar cell." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/88699734017394762145.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>104<br>In this study, we demonstrated the synthesis of colloidal quantum dot (QDs) by microwave-assisted method in aqueous phase. The advantage of using microwave-assisted method is to heat the reaction temperature instantaneously and uniformly at constant temperature. The quantum dots were synthesized by the rapid reaction of ions precursor solution and short-chain bifunctional molecules. The synthesis process is simple and fast without further surface modification of ligand exchange. For the use of quantum dots, we selected free heavy metal ion precursors such

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Tsai, Yi-Yin, and 蔡宜吟. "Synthesis of N-doped and S-doped Graphene Quantum Dots for Defection of Hg Ions." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/kr6bcq.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>106<br>Sulfur and nitrogen co-doped graphene quantum dots (SN-GQDs) were synthesized through an efficient pyrolysis of citric acid, urea and ammonium sulfate and served as a highly selective probe for sensing of Hg2+ ions in aqueous solution. The pyrolysis technique is capable of preparing SN-GQDs and N-doped graphene quantum dots (N-GQDs) within a short period. The bean sprouts and celery grown in SN-GQD solution can emit blue light under 360-nm UV irradiation, indicating the permeation throughout the plant cell with good bio-compatibility. The fluorescence (FL) i

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Tsao, Shao-Yen, and 曹紹彥. "Study of Luminescence Properties in Doped MoSe2 and MoS2 Quantum Dots." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9g22j3.

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碩士<br>中原大學<br>物理研究所<br>107<br>This research is tackles the optical properties of molybdenum diselenide Quantum Dots (MoSe2 QDs) synthesized by pulsed laser ablation and Molybdenum Sulfide Quantum Dots (MoS2 QDs) synthesized by microwave heating. Pulsed laser ablation (PLA) method is a simple and rapid synthesis process. By controlling the ablation time, MoSe2 QDs can exhibit blue light emission with high photoluminescence efficiency. The structure of the MoSe2 QDs is characterized using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The optical properties are i

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Dwitya, Sat Septian, and 曾平安. "Synthesis, Characterization, and Antibacterial Activities of Nitrogen-Doped Graphene Quantum Dots." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/2z8k6m.

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碩士<br>元智大學<br>生物科技與工程研究所<br>107<br>Devastated Multi-Drug Resistant (MDR) bacteria is great distress especially misused antibiotics in hospital-acquired infections. Graphene derivatives offer great potential for the disinfection of bacteria. However, the intrinsic antibacterial activity of graphene derivatives is scarce, and the combination of other antibacterial agents often results in their undesirable issues. Nevertheless, microbial reduction of N-doped GQDs under aerobic conditions is poorly understood despite its critical role in changing GO toxicity and environmental fate. Herein, a stabl

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ANH, NGUYEN THI NGOC, and 阮氏玉瑩. "Sulfur Doped Graphene Quantum Dots based Sensor for Environmental and Biomedical Application." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/gm3pth.

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博士<br>國立交通大學<br>環境工程系所<br>107<br>Nanoscale materials have attracted potentials to impact the broad fields of heavy metal and biological sensing. In addition, the incorporation of nanomaterials and nanostructures into sensors leads to improve performance of detection capability. Fluorescent graphene quantum dots (GQDs) and metal nanoparticles are one of member nanomaterials have evoked significant attention in sensor. Many efforts have been made during recent years to develop portable sensors for environmental monitoring heavy metals. GQDs along doping with hetero structure specially sulfur (S)

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Moraczewski, Peter [Verfasser]. "Electronic and magnetic properties of manganese doped quantum dots / vorgelegt ovn Peter Moraczewski." 2009. http://d-nb.info/100034620X/34.

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KAO, YU-TING, and 高于庭. "Propertices of MAPbI3 perovskite solar cells with gold nanoparticles doped CsPbBr3 quantum dots." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9gs68c.

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碩士<br>國立臺北科技大學<br>光電工程系<br>107<br>In this study, Au-CsPbBr3 and PEDOT:PSS were spin-coated on an etched ITO (Indium Tin Oxide) substrate using a spin coater under normal atmosphere, and then moved to a nitrogen-filled glove box, MAPbI3 was coated on ITO substrate with Au-CsPbBr3 and PEDOT:PSS thin film. Then Evaporation of C60 using a vapor deposition system to form a film, return to glove box and then carry out the MAPbI3 layer heating action to make the film more uniform, and sent back to the thermal evaportation of Ag, and finally made into a perovskite solar cell of Glass/ITO/Au-CsPbBr3/PE

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Huang, Wei-ting, and 黃偉庭. "Synthesis of Transition Metal doped CuInS2/ZnS Quantum dots and Their Bio-applications." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/09976821101785433563.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>101<br>Part I：In this work, we have used shell growth doping strategy for the synthesis of transition metal ion doped CuInS2/ZnS quantum dots (QDs). CuInS2 QDs was utilized to be a host and followed by depositing thin ZnS shell for the attachment of transition metal ions (such as Mn2+, Ni2+, and Co2+). We report the effect of the different transition metal doped CuInS2/ZnS QDs on the optical properties (such as photoluminescence [PL] quantum yield, PL full width at half-maximum, and wavelength of maximum PL emission) of QDs. The presented materials were characterized

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LU, CHI-TING, and 盧紀廷. "Nitrogen Doped Carbon Quantum Dots : Low-Cost Preparation and Application in Photo-Sensing Devices." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/76eke5.

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碩士<br>國立高雄大學<br>化學工程及材料工程學系碩士班<br>105<br>In this work, we have successfully synthesized nitrogen doped carbon quantum dots ( N-CQDs ) with low-cost preparation. First, carbon quantum dots ( CQDs ) and N-CQDs were prepared with hydrothermal method. With solution effect, temperature effect and concentration effect, we compared these influence on luminescence properties. To discuss these influence about the doping position and nitrogrn-doped content, we analyzed CQDs and N-CQDs with Fluorescence Spectrophotometer ( FL ) and Electron Spectroscopy for Chemical Analysis ( ESCA ). Then, composited wi

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Cheng, Chieh-An, and 鄭傑安. "Investigations of Negative Differential Resistance in Graphene Oxide Quantum Dots Doped with Amino Acid." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/nx9xn3.

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碩士<br>中原大學<br>物理研究所<br>107<br>In this research, a microwave-synthesis method is used to synthesize Graphene Oxide Quantum Dots (GOQDs) with Cysteine and Glutamine as amino acid dopants. Ultraviolet (UV) absorption spectroscopy, photoluminescence (PL) spectroscopy, time-resolved PL (TRPL) spectroscopy, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) were used to investigate the effect of amino acid doping on the structure and optical properties of GOQDs. Here, amino acid doped-GOQDs displays bright blue PL under UV light exposure. A phenomenon of negative diffe

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Yuan, Chun-Yao, and 袁君堯. "Synthesis of nitrogen-doped quantum dots by infrared induction heating technique for photoluminescent applications." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/jmh776.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>106<br>This paper reports an efficient fabrication of N-doped graphene quantum dots (GQDs) showing controllable chemical and fluorescence (FL) properties through infrared carbonization (IRC) of citric acid and urea. The GQDs prefer to form an equilibrium shapes of circle with an average particle size ranged from 5 to 10 nm. The N/C atomic ratio in GQDs can be precisely tailored in a range from 21.6 to 49.6 at.% by simply controlling the weight ratio of citric acid to urea. With increasing the urea content, the GQDs not only contain N-doped graphene but also incorpo

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Huang, Hao-Hsin, and 黃皞心. "Visible Light-Assisted Bacterial Inactivation of Halogen/Nitrogen Co-Doped Polymeric Graphene Quantum Dots." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ez45wf.

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碩士<br>國立臺灣海洋大學<br>生命科學暨生物科技學系<br>107<br>In this work, we have developed visible light activated halogen/nitrogen co-doped polymeric graphene quantum dots (HX/N–PGQDs, (X= Cl, Br, I)) as antibacterial agent, by a simple one-step synthesis method. Microbial contamination due to bacteria and fungi poses serious threats to human health and has presented an unprecedented new challenges to antibacterial research for many years. The major challenge is the evolution of drug resistant bacteria, which are evolving faster than previously anticipated. With the recent advancement in nanotechnology, much pr

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Gliniak, Jacek, and 柯亞瑟. "Sulfur-Doped Graphene Oxide Quantum Dots as Photocatalysts for Hydrogen Production in the Aqueous Phase." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/m3s72y.

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博士<br>國立交通大學<br>分子醫學與生物工程研究所<br>106<br>Nowadays our electricity production is mostly based on a non-renewable energy resources, mainly fossil fuels which are projected to deplete in near future. Renewable energy resources available today are still not efficient enough to satisfy our constantly growing energy demand. One of the proposed scenarios is to produce hydrogen from water by solar light, and use it as the energy carrier in a hydrogen fuel cells, producing only water without any pollutants. Hence, searching for novel photocatalysts based on nonprecious metals or metal-free, especially ca

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Kuei, Chang-Si, and 江璽貴. "Preparation of N-doped Carbon Quantum Dots for Detection of Metal Ions in Aqueous Solutions." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/4ee4sd.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>107<br>This study adopts an efficient pyrolysis of citric acid and urea to synthesize carbon quantum dots for detection of various metal ions in aqueous solutions. Two kinds of CQDs: N-doped and N-/S-doped CQDs, namely, N-CQD and SN-CQD, are found to emit fluorescence (i.e., blue and green light) under ultraviolet irradiation (360 nm). Both CQDs show a super hydrophilicity and they are thus uniformly dispersed in aqueous solutions. The fluorescence quenching of both CQD suspensions can be viewed in the presence of metal ions, i.e., Na+, K+, Fe2+, and Pb2+. Interest

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Hsueh-ChihHsu and 許學誌. "Performance Improvement of Flexible Organic Solar Cells with Quantum Dots Doped in Active Layer and Nanorod Structure." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/nu84xr.

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Chen, Guan-Rong, and 陳冠榮. "Rapid microwave-assisted synthesis of Gd-doped CuInS2/ZnS quantum dots for cancer specific dual-modal imaging." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/58673086642317387720.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>103<br>We present a facile microwave-assisted synthetic route for the preparation of water-soluble and high-quality Gd doped CuInS2/ZnS quantum dots (CIGS/ZnS QDs) with glutathione (GSH) and Citric acid trisodium salt (SC) as the duel stabilizer. The as-prepared CuInS2/ZnS QDs exhibited small particle sizes (~2.5 nm), long photoluminescence lifetime, and color-tunable properties ranging from the 541 nm to the 570 nm by varying the synthesis temperature. We also replaced Zn, Cd, Al, Ga elements instead of Gd, all are shown fluorescence and the optical wavelength range

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Lawless, Darren. "Photophysical studies on ultra-small semiconductor particles : CdS quantum dots, doped and undoped TiO₂2, and silver halides." Thesis, 1993. http://spectrum.library.concordia.ca/6080/1/NN84678.pdf.

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Kan, Song Rong, and 甘松融. "One-Pot Synthesis of Highly Fluorescent N-doped Graphene Quantum Dots for Sensing and Screening of Tetracycline in Honey." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/84914282356763551466.

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碩士<br>國立清華大學<br>化學系<br>103<br>Graphene quantum dots (GQDs) are nano-sized materials having unique properties like the quantum confinement effect and edge effect which has led to its emergence in fluorescence-based applications. The low toxicity, high solubility, chemically inertness, and stable luminescent properties of GQDs must be explored further for its application in sensors and bio imaging studies. A one-pot synthesis of GQDs based on the bottom-up approach has been developed in this study with citric acid and amino acids（glycine、cysteine） precursors to successfully achieve two N-do

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Lin, Pei-Hsuan, and 林佩萱. "Nitrogen and Chlorine Co-Doped Carbon Quantum Dots Synthesized from Aliphatic Diamines and Hydrohalic Acids as Broad-Spectrum Antipathogenic Agents." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/y75ujs.

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碩士<br>國立臺灣海洋大學<br>生命科學暨生物科技學系<br>107<br>Over the past decades, many pathogens have developed drug-resistance due to the abuse of antibiotics. Therefore, the development of new antimicrobial agents with superior antibacterial activity has become an interesting target. In this study, we developed a simple one-step method to synthesize nitrogen (N) and chlorine (Cl) co-doped carbon quantum dots (N/Cl-CQDs) as a broad-spectrum antibacterial agent. We have prepared a series of N/Cl-CQDs through one-step heating of the solution, which consist one of the aliphatic diamines [ethylenediamine (DAE), 1,4

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Lu, Chen-Yin, and 路承穎. "Effects of Cl-doped ZnSe Capping Layer on the Optical Properties of CdSe Quantum Dots Grown by Molecular Beam Epitaxy." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/74008583233069321640.

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碩士<br>國立交通大學<br>電子物理系所<br>104<br>CdSe quantum dots of different sizes were grown by molecular beam epitaxy. The effect of Cl-doped ZnSe capping layer on the optical properties of QDs were investigated. The existence of the Cl-doped capping layer results in a clear peak energy red-shift but also the broadening of the full width at half maximum in the photoluminescence (PL) spectrum. In addition, the emission intensity was remarkably increased. The temperature dependent PL showed that the emission intensity of the QDs capped by Cl-doped ZnSe deos not strongly depend on temperature. Following the

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Chen, Yu-Yu, and 陳余育. "Study of Photocatalytic Removal of Nitrogen Oxides by using Nitrogen-Doped Carbon Quantum Dots and Zinc Hydroxide Stannate/SnO2 Binary Complexes." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7ppkv7.

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碩士<br>中原大學<br>環境工程學系<br>106<br>Source of Nitrogin Oxide mainly divided into nature and hunam factors. The formation of nitrogan oxides in nature is mainly caused by lighting, fire and microbial nitrogen fixation. Human activities are mainly emitted by combusion behavior, while the combustion process comes from stationary pollution sources (such as power plants, incinerators ,etc.) and mobile pollution sources (such as steam locomotive). Nitrogen oxides not only cause harm to the human body, but also may cause bronchitis, emphysema, and environmental hazards such as photochemical smog, acid rai

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Chuang, Wen-Ling, and 莊文齡. "Characteristics of the Nano-crystalline Si Quantum Dots Embedded in the Al-doped ZnO Thin Films and the p-type ZnO Thin Films for Solar Cell Applications." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/17510476037466180417.

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碩士<br>國立交通大學<br>光電工程學系<br>99<br>In order to achieve high efficiency and low cost solar cells, all silicon-based tandem solar cells including the nano-crystalline silicon (nc-Si) quantum dots (QDs) are proposed. The nc-Si QD thin films stacking with different bandgaps can reduce the high energy photon loss, so the efficiency can be improved. In general, most groups will embed nc-Si QDs in the Si-based materials, such as SiO2, Si3N4, and SiC. Because of poor conductivity of these materials, the efficiency is still substantially lower than the theoretical value. In this study, we propose to embed

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Hazarika, Abhijit. "Photophysical Properties of Manganese Doped Semiconductor Nanocrystals." Thesis, 2015. http://etd.iisc.ernet.in/2005/3675.

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Electronic and optical properties of semiconducting nanocrystals, that can be engineered and manipulated by various ways like varying size, shape, composition, structure, has been a subject of intense research for more than last two decades. The size dependency of these properties in semiconductor nanocrystals is direct manifestation of the quantum confinement eﬀect. Study of electronic and optical properties in smaller dimensions provides a platform to understand the evolution of fundamental bulk properties in the semiconductors, often leading to realization and exploration of entirely new an

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