Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"chemical vapour deposition (CVD)"”.
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Development of germanium based sulphide glass by chemical vapour deposition (CVD)
Chalcogenide glasses, especially sulphide glasses, are becoming more and more important for the fabrication of optoelectronic devices in part because of the high nonlinearity, strong photosensitivity and several other unique properties they have. Chalcogenide glasses are normally fabricated by a …
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Characterization of carbon nanotubes grown by chemical vapour deposition
… CNTs are: Arc-discharge, laser ablation (LA) and chemical vapour deposition (CVD). In the present work CNTs were grown from a mixture of camphor (C10H16O) and ferrocene (C10H10Fe) using Chemical Vapour Deposition (CVD) and argon was used as a carrier gas. The iron particles from ferrocene acted as …
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Synthetic industrial diamond : a technological outlook
… for crystallising carbon material and (ii) chemical vapour deposition (CVD) of these materials. The substitution of synthetic for natural diamond occurred in a systematic and predictable manner. Further technological advance could threaten the concept of diamond as a unique and desirable …
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Application of the transformation of 1,2,4-Trimethylbenzene to monitor the chemical vapour deposition of Tetraethoxysilane over ZSM-5
The present work reports an improved chemical vapour deposition (CVD) technique using low temperature, tetraethoxysilane (TEOS) and repeated CVD-calcination cycles. This results in a better control of the external surface activity and the pore mouth size of ZSM-5. In search for effective …
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INTERFACE ENGINEERING OF 2D MATERIAL NANODEVICES
… with 1D seamless interface synthesised by chemical vapour deposition (CVD) have also been investigated. Controllable localized conversion from WS2 to WSxSe2-x alloy has been achieved by direct patterning on as-grown WS2 using energetic electron beam.
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Silicon nanoparticle sysnthesis through thermal catalytic pyrolysis
… gate memory devices, solid state lighting, chemical sensors and flexible electronics, including solar cells and luminescent materials, printed on paper. A remaining key challenge however in the development of applications is the reproducible and reliable production of nanomaterial in …
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The chemical vapour deposition of Tetraethoxysilane on Zeolite ZSM-5
… thesis reports on the investigation of a cyclic chemical vapour deposition (CVD) method eliminating unwanted surface reactions and enhancing shape selective properties by depositing inert silica onto the external surface of zeolite ZSM-5. A CVD treatment consists out of a deposition, flushing and …
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Structure, Properties and Treatments of Carbon Nanotube Fibres
… from the gas phase during CNT synthesis by chemical vapour deposition (CVD), and spun at rates of up to 70 m/min. Their combination of outstanding mechanical, electrical and thermal properties and low density (1 g/cm3) makes CNT fibres a potential candidate for high-performance applications. …
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Synthesis, Characterisation and Functionalisation of CdSe Quantum Dots
… ranging from colloidal synthesis to electrochemical methods to chemical vapour deposition (CVD). This thesis focuses on the synthesis of high-quality CdSe nanocrystals through a bench- top colloidal synthesis paying particular attention to the effects of varying the reaction temperature and …
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Desarrollo de sustratos de carburo de silicio mediante carburización e implantación iónica de silicio monocristalino
… allows to gather data and better physical and chemical understanding of these systems.The main objectives are (i) the fabrication and characterization of SiC and other interesting crystalline phases obtained from Si wafers and (ii) to demonstrate that these products are a viable way for using …
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Chemical vapour deposition of complex ferroic oxide thin films
Herein is presented a novel chemical vapour deposition (CVD) route for the fabrication of oxide ferroelectrics. A versatile layer-by-layer growth mode was developed to prepare naturally super-latticed bismuth based materials belonging to the Aurivillius phase family, with which good control over …
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Synthesis and characterisation of hybrid Zn0-carbon nanostructures for potential applications in hydrogen storage
… (DC) reactive magnetron sputtering at different deposition times, pressure and temperature, and were used as a seeding in the synthesis of ZnO nanorods (NRs). Using the hydrothermal process, vertically aligned ZnO NRs were grown on different seed particles which resulted in the different sizes …
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Laser produced SiO2/TiO2 coating on stainless steel substrate with sol-gel processes.
… in various ways for numerous purposes: plasma vapour deposition (PVD), chemical vapour deposition (CVD) and ion implantation (II) for optical coating, and sensor applications; sol-gel and electrodeposition for antireflective coating and protective coatings; electroplating or electrodeposition …
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Developing next generation, non-toxic, inorganic materials for photovoltaics and thin-film transistors
… investigated. Dense BiOI films grown by thermal chemical vapour deposition (CVD) incorporated into an all-inorganic ITO/NiO<sub>*x*</sub>/BiOI/ZnO/Al stack demonstrate high external quantum efficiencies (80% at 450 nm wavelength). However, the 1.9 eV band gap of BiOI is not matched to terrestrial …
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In-liquid bulk acoustic wave resonators for biosensing applications
… carbon nanotube (CNT) forests are grown by chemical vapour deposition (CVD) at 600 $^{\circ}$C using Fe/Al layers on the active area of inclined $\textit{c}$-axis AlN SMRs designed for improved thermal and chemical stability. The dense CNT forest (with 0.5/8 nm Fe/Al) of $\sim$15 μm height …
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Two-dimensional transition metal dichalcogenides as next generation semiconductor materials
… line of work is the improvement of TMD growth. Chemical vapour deposition (CVD) is a popular TMD growth process. Though high quality TMDs have been produced by CVD, there is a lack of knowledge about how to grow at lower temperature, in order to stay within the thermal budget of 3D BEOL. We …
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The inertisation of the zeolites ZSM-5, mordenite and beta by chemical vapour deposition using tetraethoxysilane
… good zeolite to study in this regard. Chemical vapour deposition (CVD) and chemical liquid deposition (CLD) methods have shown great promise in inertising the external surface acidity of zeolites and thus increasing their selectivity for various reactions. The external surface acidity …
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Growth of V2O5 films for electrochromic and battery applications
… shown potential as a cathode material in electrochemical power sources such as lithium ion batteries, which becomes more significant with the ever-growing demand for portable electronic devices. A large amount of work is being done to develop high performance, reliable and ecologically friendly …
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Laterally confined THz sources and graphene based THz optics
… can be achieved by gating graphene grown via chemical vapour deposition (CVD) to a high carrier concentration. THz time domain spectroscopy of such gated monolayer graphene shows resonance features around 1.6 THz superimposed on the Drude-like frequency response of graphene which may be …
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Optimisation, Stabilisation, and Localisation of Quantum Emitters in Layer-Engineered Hexagonal Boron Nitride
… first, by building upon previously developed chemical vapour deposition (CVD) growth procedures of monolayer (ML) hBN films, a large-area, continuous, and versatile SPE host material is created; second, to characterise it, a photoluminescence (PL) characterisation technique was newly applied …
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