Дисертації з теми "Cadium Nanostructures"
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Salavati, Niasari M. "Synthesis of cadmium sulfide nanostructures by novel precursor." Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20589.
Повний текст джерелаГринько, Д. О., Д. О. Гринько, D. O. Grynko, О. П. Дмитриев, О. П. Дмитриев, O. P. Dimitriev, П. С. Смертенко, et al. "Injection Spectroscopy of Deep Traps in Nanostructured Films of Cadmium Sulfide." Thesis, Sumy State University Publishing, 2013. http://essuir.sumdu.edu.ua/handle/123456789/33901.
Повний текст джерелаGrynko, D. O., O. P. Dimitriev, P. S. Smertenko, O. M. Fedoryak, Анатолій Сергійович Опанасюк, Анатолий Сергеевич Опанасюк, Anatolii Serhiiovych Opanasiuk, et al. "Injection Spectroscopy of Deep Traps in Nanostructured Films of Cadmium Sulfide." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35240.
Повний текст джерелаKum, Maxwell Chun Man. "Fabrication, device assembly, and application of one-dimensional chalcogenides nanostructures." Diss., [Riverside, Calif.] : University of California, Riverside, 2009. http://proquest.umi.com/pqdweb?index=0&did=1957320811&SrchMode=2&sid=2&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1269280132&clientId=48051.
Повний текст джерелаIncludes abstract. Available via ProQuest Digital Dissertations. Title from first page of PDF file (viewed March 12, 2010). Includes bibliographical references. Also issued in print.
Chévere-Trinidad, Néstor Luis. "Part A: Nanoscale semiconductors through electrodeposition Part B: Mechanistic studies of the copper-catalyzed reactions /." Amherst, Mass. : University of Massachusetts Amherst, 2009. http://scholarworks.umass.edu/dissertations/AAI3349714/.
Повний текст джерелаFrégnaux, Mathieu. "Élaboration et caractérisation de nanocristaux de sulfure de cadmium - dépôt en couches minces nanostructurées." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0284/document.
Повний текст джерелаTwo chemical methods are developed to synthesize cadmium sulfide (CdS) nanocrystals (NC) in bottom-up approach: (i) single-source precursor methodology and (ii) microwave synthetic route. These two growth techniques are complementary in the size range obtained and allow production of small NC (2.8 nm - 5.2 nm) in only (i) 120 min and (ii) some minutes. A joint technique characterization protocol is developed to study the synthesized NC. Mass spectrometry (MS) coupled to soft ionization sources allows to control the purity and stability of the precursors and to estimate the NC size and size distribution. These estimations are confirmed by transmission electron microscopy (TEM). Comparison between SM and TEM results suggests that NC have (i) spherical and (ii) prolate shapes. X-ray diffraction reveals nanoparticle crystalline structure in (i) wurtzite and (ii) zinc blende symmetries. Room temperature optical spectrometry (absorption and photoluminescence - PL) evidences quantum confinement effects by the shift of the excitonic response as a function of the NC size, in the blue-UV spectral range. These results are consistent with the well-known empirical energy-size correspondence. For optoelectronic application purpose, thin film deposition of polymer (PMMA) containing CdS NC is initiated by spin coating. The previous characterization protocol, extended to techniques dedicated to thin film studies, shows that NC maintain their integrity and PL properties after inclusion in PMMA layer
Hiramatsu, Hiroki. "Systematic investigations on the assembly and properties of multicomponent nanostructures comprised of gold, silver, cadmium selenide, and silica nanoparticles /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.
Повний текст джерелаTelfer, Samantha Anne. "Fundamental study of growth of (Zn,Cd)Se on GaAs (211)B from hetero-interface to nanostructures." Thesis, Heriot-Watt University, 2000. http://hdl.handle.net/10399/515.
Повний текст джерелаLambert, Darcy Erin. "Nanostructured Extremely Thin Absorber (ETA) Hybrid Solar Cell Fabrication, Optimization, and Characterization." PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/637.
Повний текст джерелаMarsal, Laurent. "Elaboration et caractérisation de nanostructures auto-organisées de semiconducteurs II-VI." Université Joseph Fourier (Grenoble), 2001. http://www.theses.fr/2001GRE10037.
Повний текст джерелаRhomari, Mohammed. "Phosphates de zirconium et d'étain pontés par des fragments de silice : nouvelles matrices pour la réalisation de nanostructures." Montpellier 2, 1992. http://www.theses.fr/1992MON20282.
Повний текст джерелаRibayrol, Aline. "Nanostructures de semiconducteurs semimagnétiques CdTe/(Cd,Mn)Te : magnéto-optique de puits quantiques étroits, gravure ionique réactive et caractérisation de points quantiques." Montpellier 2, 1995. http://www.theses.fr/1995MON20126.
Повний текст джерелаBenallali, Hammouda. "Étude de nanostructures de semiconducteurs II-VI par sonde atomique tomographique." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4324.
Повний текст джерелаNanostructures of II-VI nanostructure have many applications in microelectronics, optoelectronics and photonics. For example, II -V quantum dots have shown the ability to be a source of single photons. In this work, we performed in the chemical and structural characterization of nanostructures of II-VI semiconductors (self- organized quantum dots (QDs), nanowires II-VI and III- V ...) by atom probe tomography (APT). Firstly, the analysis conditions of III-V and II- VI semiconductors by APT were optimized. Then, we studied the chemical composition of II-VI/III-V interfaces and showed the formation of a Ga2.7Se3 compound at the ZnSe/GaAs interface and the (Ga, Zn) cations mixing at the ZnTe/InAs interface. The measurements of the chemical composition and the sizes of quantum dots in three dimensions by APT allowed making a correlation with optical measurements. We studied also growth mechanisms of GaAs, ZnTe nanowire and the CdTe QDs inserted in ZnTe nanowires by analyzing the chemical composition of the catalysts QDs and nanowires basis. These measurements show that the quantum dots are formed of a strong mixing of CdxZn1-xTe. A scenario based on surface diffusion has been proposed to explain the growth and the mixing between Zn/Cd for the QDs
Miyata, Marcio Eduardo Vidotti. "Síntese e caracterização de eletrodos modificados por nanopartículas, visando materiais eletrocrômicos de alto desempenho." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/46/46132/tde-18102007-174203/.
Повний текст джерелаThe present work describes the synthesis and characterization of pure Nickel Hydroxide nanoparticles, and with cobalt and cadmium as additives, by applying ultrasound radiation. Were obtained nanoparticles of about 5 nm, being characterized by HRTEM, Raman and Infrared spectroscopies, thermogravimetric, ICP-OES and X-ray diffraction. Nanoparticles immobilization onto conducting glass substrates was performed by adsorption of electrostatic layers and by electrophoretic deposition. High performant electrochromic electrodes were obtained, showing high electrochromic efficiencies and low response times, evidencing the nickel hydroxide nanometric architecture. Additives incorporation on nickel hydroxide nanoparticles provided high improvements on electrochromic properties. Cobalt addition shifted the redox peaks to lower potentials, avoiding by this way the oxygen reaction. Cadmium addition diminished the electrostatic repulsion between layers, avoiding the so-called effect, providing a high durability to the electrochromic electrode.
Hartmann, Jean-Michel. "Epitaxie par jets moléculaires alternés d'hétérostructures CdTe/Mn(Mg)Te : application à la réalisation de super-réseaux verticaux." Université Joseph Fourier (Grenoble ; 1971-2015), 1997. http://www.theses.fr/1997GRE10204.
Повний текст джерелаGourgon, Cécile. "Fabrication et caractérisation optique de fils et boites quantiques CdTe/CdZnTe." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10145.
Повний текст джерелаKhatei, Jayakrishna. "Optical, Electrical and Photo-physical Investigations of Cd(Hg)Te Nanostructures Synthesized by Solvothermal Method." Thesis, 2011. https://etd.iisc.ac.in/handle/2005/4607.
Повний текст джерела"Fabrication and characterization of surface engineered one-dimensional cadmium selenide nanostructure =: (硒化鎘一維納米結構之表面處理及其表徵)". 2008. http://library.cuhk.edu.hk/record=b5893541.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 2008.
Includes bibliographical references.
Text in English; abstracts in English and Chinese.
Lam, Ngai Sze.
Abstract --- p.i
Acknowledgements --- p.iii
Table of contents --- p.iv
List of Figures --- p.viii
List of Tables --- p.xiii
Chapter Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Background --- p.1
Chapter 1.1.1 --- Properties of CdSe --- p.1
Chapter 1.1.2 --- Synthesis of CdSe one-dimensional (ID) nanostructure --- p.5
Chapter 1.1.3 --- Application of CdSe nanostructures --- p.8
Chapter 1.1.4 --- Significance of surface engineering --- p.10
Chapter 1.1.4.1 --- Surface passivation --- p.11
Chapter 1.1.4.2 --- Surface functionalization --- p.11
Chapter 1.1.4.3 --- Modulation of optical/electrical properties --- p.12
Chapter 1.2 --- Present study --- p.14
Chapter 1.2.1 --- Objective --- p.14
Chapter 1.2.2 --- General methodology --- p.14
Chapter Chapter 2 --- Instrumentation --- p.19
Chapter 2.1 --- Introduction --- p.19
Chapter 2.2 --- Setup of Sample Preparation --- p.19
Chapter 2.2.1 --- Synthesis --- p.19
Chapter 2.2.1.1 --- Thermal evaporation apparatus --- p.19
Chapter 2.2.1.2 --- Microwave assisted chemical synthesis --- p.21
Chapter 2.2.2 --- Sample handling --- p.22
Chapter 2.2.3 --- Other treatments --- p.22
Chapter 2.3 --- X-ray photoelectron spectrometer (XPS) --- p.22
Chapter 2.3.1 --- Basic Principle --- p.22
Chapter 2.3.2 --- Instrumentation --- p.24
Chapter 2.3.3 --- Charging problem --- p.27
Chapter 2.3.4 --- Qualitative analysis --- p.27
Chapter 2.3.5 --- Quantitative analysis --- p.28
Chapter 2.3.5.1 --- Curve fitting --- p.28
Chapter 2.3.5.2 --- Atomic percentage --- p.29
Chapter 2.3.5.3 --- Thickness determination --- p.29
Chapter 2.4 --- Photoluminescence --- p.30
Chapter 2.4.1 --- Basic principle --- p.30
Chapter 2.4.2 --- Instrumentation --- p.31
Chapter 2.5 --- Other equipments --- p.32
Chapter Chapter 3 --- Synthesis of CdSe Nanorods --- p.34
Chapter 3.1 --- Introduction --- p.34
Chapter 3.2 --- Thermal evaporation --- p.34
Chapter 3.2.1 --- Experimental procedures --- p.34
Chapter 3.2.2 --- Characterization --- p.35
Chapter 3.3 --- Microwave assisted method --- p.41
Chapter 3.3.1 --- Experimental procedures --- p.41
Chapter 3.3.2 --- Characterization --- p.42
Chapter 3.4 --- Summary --- p.47
Chapter Chapter 4 --- Surface Treatment of CdSe Nanorods --- p.49
Chapter 4.1 --- Introduction --- p.49
Chapter 4.2 --- Experimental procedures --- p.50
Chapter 4.3 --- Results and Discussion --- p.51
Chapter 4.3.1 --- Formation of Se-coated CdSe NRs --- p.51
Chapter 4.3.2 --- Desorption and thinning --- p.56
Chapter 4.3.3 --- Surface degradation --- p.67
Chapter 4.4 --- Summary --- p.69
Chapter Chapter 5 --- Surface Capping of CdSe Nanorods --- p.73
Chapter 5.1 --- Introduction --- p.73
Chapter 5.2 --- Experimental procedures --- p.73
Chapter 5.3 --- Results and Discussion --- p.74
Chapter 5.3.1 --- Capping of thiol with halo-functional group --- p.74
Chapter 5.3.1.1 --- Compositional analysis --- p.75
Chapter 5.3.1.2 --- PL analysis --- p.79
Chapter 5.3.2 --- Capping of DNA --- p.81
Chapter 5.3.2.1 --- Compositional analysis --- p.81
Chapter 5.3.2.2 --- PL analysis --- p.83
Chapter 5.4 --- Summary --- p.92
Chapter Chapter 6 --- Conclusions and Future Work --- p.94
Chapter 6.1 --- Conclusions --- p.94
Chapter 6.2 --- Future work --- p.95
"Growth and characterization of 1-D nanostructured CdS." 2005. http://library.cuhk.edu.hk/record=b5892648.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 2005.
Includes bibliographical references.
Text in English; abstracts in English and Chinese.
by Wang Yu = Yi wei na mi jie gou liu hua ge de sheng chang he biao mian / Wang Yu.
Acknowledgements --- p.i
Abstract --- p.ii
摘要 --- p.iii
Table of contents --- p.iv
List of figures --- p.vi
List of tables --- p.ix
Chapter Chapter 1 --- Introduction
Chapter 1.1 --- Background --- p.1-1
Chapter 1.1.1 --- One-dimensional (1 -D) nanostructures --- p.1-1
Chapter 1.1.2 --- "Characteristics, properties, and applications of 1 -D nanostructures" --- p.1-1
Chapter 1.1.3 --- Synthesis and growth mechanisms --- p.1-3
Chapter 1.1.3.1 --- Vapor-Liquid-Solid (VLS) mechanism --- p.1-4
Chapter 1.1.3.2 --- Vapor-Solid (VS) mechanism --- p.1-5
Chapter 1.2 --- II-VI semiconductor nanomaterials --- p.1-5
Chapter 1.2.1 --- Cadmium sulfide (CdS) --- p.1-6
Chapter 1.2.1.1 --- Characteristics and potential applications --- p.1-6
Chapter 1.2.1.2 --- Works performed by others --- p.1-7
Chapter 1.3 --- Objectives and approaches in this work --- p.1-8
Chapter 1.4 --- Thesis layout --- p.1-9
References --- p.1-10
Figures --- p.1-13
Tables --- p.1-14
Chapter Chapter2 --- Methodology and instrumentation
Chapter 2.1 --- Experimental setup --- p.2-1
Chapter 2.1.1 --- Substrates --- p.2-1
Chapter 2.1.2 --- Experimental settings --- p.2-2
Chapter 2.2 --- Growth parameters --- p.2-2
Chapter 2.3 --- Characterization methods --- p.2-3
Chapter 2.3.1 --- "Phase, morphology and microstructure analysis" --- p.2-3
Chapter 2.3.1.1 --- X-ray diffractometry (XRD) --- p.2-3
Chapter 2.3.1.2 --- Scanning electron microscopy (SEM) --- p.2-4
Chapter 2.3.1.3 --- Transmission electron microscopy (TEM) --- p.2-4
Chapter 2.3.1.4 --- High-resolution transmission electron microscopy (HRTEM)
Chapter 2.3.2 --- Cathodoluminescence (CL) --- p.2-5
Chapter 2.3.2.1 --- Principles of CL --- p.2-5
Chapter 2.3.2.2 --- Advantages of CL --- p.2-6
Chapter 2.3.2.3 --- CL settings --- p.2-6
References --- p.2-7
Figures --- p.2-8
Chapter Chapter3 --- Results and discussions part I - Growth of CdS nanobelts
Chapter 3.1 --- Characterization in general --- p.3-1
Chapter 3.2 --- Morphology and microstructure --- p.3-1
Chapter 3.2.1 --- Nanobelt with Au droplet at the tip --- p.3-2
Chapter 3.2.2 --- Nanobelt without Au droplet at the tip --- p.3-2
Chapter 3.3 --- Effect of Au catalyst --- p.3-3
Chapter 3.4 --- Growth models --- p.3-3
Chapter 3.5 --- Samples sintered at different temperatures --- p.3-5
Chapter 3.6 --- Samples at different deposition zones --- p.3-6
Chapter 3.7 --- Cathodoluminescence --- p.3-6
Chapter 3.7.1 --- Blue shift in the deep level emission --- p.3-7
Chapter 3.7.2 --- Intensity of the emission --- p.3-8
References --- p.3-10
Figures --- p.3-11
Tables --- p.3-24
Chapter Chapter4 --- Results and discussions part II - Asymmetric growth on the CdS ribbons
Chapter 4.1 --- Surface polarization --- p.4-1
Chapter 4.2 --- One sided saw-teeth ribbons --- p.4-2
Chapter 4.3 --- Two-sided comb-like ribbons --- p.4-3
Chapter 4.4 --- Growth models for the asymmetric growth --- p.4-5
References --- p.4-7
Figures --- p.4-8
Chapter Chapter5 --- Conclusions and future studies
Chapter 5.1 --- Conclusions --- p.5-1
Chapter 5.2 --- Future studies --- p.5-2
References --- p.5-4
Mazumdar, Sayantan. "Harvesting Solar Photon Using TiO2-CdS Nanostructured Semiconductor Assemblies." Thesis, 2015. https://etd.iisc.ac.in/handle/2005/4527.
Повний текст джерела"Fabrication of three dimensional nanostructured cadmium selenide and its potential applications in sensing of deoxyribonucleic acid." 2009. http://library.cuhk.edu.hk/record=b5894109.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 2009.
Includes bibliographical references.
Abstract also in Chinese.
Ho, Yee Man Martina = Xi hua ge san wei na mi jie gou zhi zhi zuo ji qi gan ying tuo yang he tang he suan zhi ying yong qian neng / He Qiwen.
Chapter Chapter 1 --- Introduction
Chapter 1 --- Photovoltaic properties of CdSe --- p.1
Chapter 1.1 --- Quantum size effect --- p.1
Chapter 1.2 --- Synthesis of CdSe nanostructures --- p.3
Chapter 1.3 --- Electrochemical sensing of CdSe nanostructures --- p.4
Chapter 1.3.1 --- Surface passivation and functionalization of CdSe nanostructures --- p.5
Chapter 1.4 --- Electronic properties of nanocrystalline semiconductor electrode --- p.6
Chapter 1.4.1 --- Band alignment --- p.6
Chapter 1.4.2 --- Interfacial charge transfer process --- p.9
Chapter 1.4.3 --- Surface traps and adsorbed molecules --- p.10
Chapter 1.4.4 --- DNA molecules as a capping group --- p.11
Chapter 1.5 --- Literatures review in DNA sensing --- p.12
Chapter 1.6 --- Present study --- p.14
Chapter 1.6.1 --- Objective --- p.14
Chapter 1.6.2 --- General methodology --- p.15
Chapter Chapter 2 --- Experimental
Chapter 2.1 --- Introduction into the instrumentation of this project --- p.21
Chapter 2.2 --- CHI Electrochemical workstation --- p.22
Chapter 2.2.1 --- Linear sweep voltammetry --- p.24
Chapter 2.2.2 --- Cyclic voltammetry --- p.24
Chapter 2.2.3 --- Multiple potential step --- p.25
Chapter 2.3 --- CEM Microwave-assisted chemical synthesizer --- p.27
Chapter 3.1 --- Morphological examination by scanning electron microscopy --- p.28
Chapter 3.2 --- Elemental analysis by energy dispersive x-ray spectroscopy --- p.30
Chapter 3.3 --- Crystal structure analysis by x-ray diffraction --- p.31
Chapter 3.4 --- Surface compositional analysis by x-ray photoelectron spectroscopy --- p.32
Chapter 3.5 --- Transmission electron microscopy --- p.34
Chapter Chapter 3 --- Synthesis of 3D nanostructured CdSe multipod electrodes
Chapter 3.1 --- Introduction into the synthesis of CdSe MP electrode --- p.35
Chapter 3.2 --- Recipe for the synthesis of CdSe NPs --- p.36
Chapter 3.3 --- The synthesis of CdSe MPs --- p.37
Chapter 3.3.1 --- Tuning the experimental parameters: Reaction temperature --- p.37
Chapter 3.3.2 --- Tuning the experimental parameters: Reaction hold time --- p.46
Chapter 3.3.3 --- Tuning in experimental parameters: Precursor molar ratio --- p.50
Chapter 3.4 --- The fabrication of MP CdSe on a conductive substrate --- p.54
Chapter 3.4.1 --- The electrodeposition of CdSe thin films on ITO/glass substrates --- p.55
Chapter 3.4.2 --- The growth of CdSe MPs on CdSe/ ITO/glass --- p.57
Chapter 3.5 --- The characterization of MP CdSe electrode --- p.57
Chapter Chapter 4 --- Electrical and opto-electric characteristics of CdSe MP electrodes and their applications as platforms for the DNA recognition
Chapter 4.1 --- Introduction to the property characterization of CdSe MP electrodes --- p.62
Chapter 4.2 --- DNA surface attachment --- p.64
Chapter 4.2.1 --- Mechanism of DNA surface anchoring --- p.65
Chapter 4.3 --- I-V characterization in PBS --- p.69
Chapter 4.3.1 --- Experimental procedures of the I-V tests in PBS --- p.70
Chapter 4.3.2 --- Results and discussions of I-V tests in PBS --- p.72
Chapter 4.3.2.1 --- Exercising as-prepared CdSe MP electrode --- p.74
Chapter 4.3.2.2 --- I-V characteristics of CdSe MP electrodes before and after ssDNA attachment --- p.75
Chapter 4.3.2.3 --- I-V characteristics of CdSe MP electrodes before and after the dsDNA attachment --- p.76
Chapter 4.3.2.4 --- "Photo-response of bare CdSe MP, ssDNA/CdSe MP and dsDNA/CdSe electrodes" --- p.77
Chapter 4.4 --- "Photovoltaic I-V measurement in I3""/I"" redox electrolyte" --- p.79
Chapter 4.4.1 --- Experimental procedures --- p.79
Chapter 4.4.2 --- Results and discussions --- p.80
Chapter 4.5 --- Possible application implied by the results --- p.88
Chapter 4.5.1 --- DNA base pair mismatch identification --- p.91
Chapter 4.5.2 --- Field-assisted DNA hybridization acceleration process --- p.92
Chapter Chapter 5 --- Conclusions
Chapter 5.1 --- Conclusions --- p.95
Norman, Zachariah Mitchell. "Structure and Transport in Nanocrystalline Cadmium Selenide Thin Films." Thesis, 2015. https://doi.org/10.7916/D8JQ10RG.
Повний текст джерелаChen, Chih-Chiang, and 陳志強. "Preparation and applications of doped 1-D nanostructures of cadmium selenide and zirconium dioxide with vapor-deposition processes." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/94971246498064206754.
Повний текст джерела國立清華大學
化學工程學系
95
The present research focuses on the preparation and applications of the one-dimensional (1-D) nanostructures of cadmium selenide (CdSe) and zirconium dioxide (ZrO2) fabricated via the vapor phase based deposition processes. First, for the preparation of the CdSe nanowires, we developed a PVD process with the VLS growth mechanism. SEM, XRD, TEM, PL, and UV-vis analyses were conducted and the plausible growth mechanism of the 1-D CdSe nanowires was proposed and discussed. Second, for the application of the cadmium selenium nanowires, a low molar ratio of Mn was doped into the CdSe nanowires to produce CdSe based diluted magnetic semiconductor (DMS) nanowires. The Mn content (0.4、0.8 and 1.4 mol%) was found to affect the magnetic property of the present DMS nanostructure. For example, the blocking temperature (TB) and the coercivity of the ferro- magnetism state increase with increasing Mn doping concentration. For the preparation of ZrO2 nanorod array, we developed an MOCVD process. When the furnace temperature was above 700℃,the monoclinic and tetragonal phases would both exist in the product nanorod array. Lastly, the additive Y2O3 was doped into the ZrO2 nanorod array to prepare yttria-stabilized-zirconia (YSZ) nanorod arrays. The Y content of 0.8(monoclinic)、13(tetragonal)、20 and 45 mol % was determined by TEM-EDS. The oxygen ion conductivity of the YSZ nanorod array with Y2O3 content of 10 mol% is only 18-31% for the empirical equation 8- YSZ nano-powders because the activation energy of the YSZ nanorod array is larger than the empirical equation. The more compact YSZ nanorod structure, the compact sinter between Pt electrode and YSZ nanorod structure and optimal co-doping system can be used to improve the oxygen ion conductivity in the future.
Crouse, Michael Matthew. "Enabling one-dimensional nanostructured materials through electrochemistry with novel template development an application towards monocrystalline nanowires of cadmium sulfide /." 2003. http://etd.nd.edu/ETD-db/theses/available/etd-11252003-145816/.
Повний текст джерелаThesis directed by Albert E. Miller for the Department of Chemical Engineering. "December 2003." Includes bibliographical references (leaves 245-258).
Makayonke, Nozuko Thelma. "The use of carbon nanotubes co-polymerized with calixarenes for the removal of cadmium and organic contaminants from water." Thesis, 2012. http://hdl.handle.net/10210/4671.
Повний текст джерелаThe contamination of water by toxic compounds is one of the most serious environmental problems today. These toxic compounds mostly originate from industrial effluents, agriculture runoff, natural sources (e.g. heavy metals in water from rocks and soil erosion) and human waste. The contamination, which is both “organic” and “inorganic” has an impact on the environment and human health. The demand for water and the pressure to re-use this valuable resource has increased the need for improved techniques and materials to remove pollutants from water. The Nanomaterials Science research group at the University of Johannesburg has focused on developing synthetic polymers that can be employed in water treatment and pollutant monitoring. Recently, cyclodextrins (CD) and carbon nanotubes (CNTs) have been included in polymers for this application. For example, CD-co-hexamethylene-/toluene-diisocyanate polyurethanes and CNT-modified equivalents have been developed and have been successfully applied in removing organic contaminants from water to very low levels.1 Calixarenes are synthetic analogues of cyclodextrins that can be exploited via chemical modification to express a range of properties. In the present study, calixarenes, thiacalixarenes and carbon nanotube-based polymeric materials incorporating these molecules have been synthesised, characterised and tested for removing both organic pollutants (such as p-nitrophenol) and inorganic pollutants (Cd2+, Pb2+) from water. Lead(II) and Cadmium(II) are a threat in South Africa because of their toxicity, and while p-nitrophenol is much less of a problem it represents a useful model organic pollutant. The absorption capacity of the polymers towards heavy metals and organic contaminants was tested by mixing the polymer with synthetic water containing known concentration of the contaminants at about 10 mg/L. Atomic absorption spectrometry (AAS) and ultraviolet-visible spectrometry (UV-vis) were used to determine the levels of heavy metals and organic contaminants, respectively. The target pollutants (Cd2+, 1 see KL Salipira MTech dissertation, University of Johannesburg 2008 Pb2+ and p-nitrophenol) were all successfully removed from water by the various polymers, however the degree of removal and loading capacities of the polymers differed. This information gives some insight into what functional components are needed for making successful adsorbents. It was observed, for example, that ptert- butylcalix[8]arene/hexamethylene diisocyanate (C8A/HMDI) had a higher adsorption capacity towards p-nitrophenol and Pb2+ than towards Cd2+, and also a higher capacity than the corresponding calix[4]arene polymers with smaller calixarene cavities.
"Synthesis and characterization of anisotropic cadmium and lead sulfide nanostructures from single source molecular precursors and an insight to their growth mechanisms." Thesis, 2010. http://hdl.handle.net/1911/62042.
Повний текст джерелаBeecher, Alexander Nathaniel. "Using atomically precise clusters to model materials." Thesis, 2016. https://doi.org/10.7916/D8XK8FTF.
Повний текст джерелаJagtap, Amardeep M. "Investigations on Photophysical Properties of Semiconductor Quantum Dots (CdxHg1-xTe,Ag2S) and their Interactions with Graphene Oxide, Organic Polymer Composites." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/3069.
Повний текст джерелаJagtap, Amardeep M. "Investigations on Photophysical Properties of Semiconductor Quantum Dots (CdxHg1-xTe,Ag2S) and their Interactions with Graphene Oxide, Organic Polymer Composites." Thesis, 2016. http://hdl.handle.net/2005/3069.
Повний текст джерела