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Showing 1 to 20 of 72 for “"Wet chemical"”.
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Fabrication of capacitors based on silicon nanowire arrays generated by metal-assisted wet chemical etching
… of the mechanisms of metal assisted wet chemical etching for fabrication of arrays of silicon nanowires, and then use this understanding to build nanowire array on-chip capacitors in silicon substrates, in order to eliminate additional packaging and enable local and efficient energy …
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Scanning tunneling microscopy and spectroscopy of wet chemical synthesized porous graphene nanoribbons in ultra-high vacuum
The student, Kaitlyn Parsons, accepted the attached license on 2018-06-29 at 12:21.
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Development of manganese oxide based nanostructures by wet chemical methods for enhanced energy storage and photocatalytic applications
… oxides exhibit a variety of distinct electrochemical and dye degradation applications. This work mainly comprised of development of manganese oxide nanostructures via wet chemical approaches such as electrochemical deposition and solvothermal techniques. The impacts of deposition parameters …
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Substrate cleaning using a remote hydrogen rf-plasma
… spectroscopy (XPS) to monitor the changes of chemical composition of the surface as a function of exposure to the hydrogen plasma. For cadmium mercury telluride (CMT) and cadmium zinc telluride (CZT) the hydrogen plasma readily removes the oxide and an amorphous Te overlayer left behind by …
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Fundamental investigations on the barrier effect of polyester micro fiber fabrics towards particle-loaded liquids induced by surface hydrophobization
… been chosen to render the surface hydrophobic: - Wet-chemical treatment - Plasma modification For the maximum efficiency of a specific wet-chemical, the following application formulations were found to be best effective: pH =4-5 Drying temperature and time=100°C / 90s Pick-up = 80% Curing …
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Low dielectric constant fluorocarbon films containing silicon by plasma enhanced chemical vapor deposition
… The films were prepared by plasma enhanced chemical vapor deposition (PECVD) using gas precursors of tetrafluoromethane as the source of active species and disilane (5 % by volume in helium) as both an active species source and a reducing agent to control the ratio of fluorine to carbon in …
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Influence of grain size, morphology and aggregation on galena dissolution
… has been studied using both microscopic and wet-chemical methods. The effects of particle size, shape, aggregation state, and grain proximity on dissolution rates were investigated. Nearly monodisperse galena nanocrystals with an average diameter of 14.4 nm and a truncated cubic shape were …
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The Influence of Powder Surface Chemistry on The Development of Ceramic Microstructures (Sintering, Micro-Agglomerates, Adhesion)
… of the powder. However, with the development of wet chemical methods of powder preparation, results have been reported in the literature which showed that processing conditions for active powders do indeed affect their subsequent behavior during firing. In particular, the influence of organic …
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Laser assisted nano-optics processing in optical data storage
… on the microlens array patterning followed by wet chemical etching to fabricate 3D nanostructures. To further reduce the feature size, near-field scanning optical lithography is employed and the near-field distribution at the fiber tip is simulated to study its effect on the patterned features. …
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Identification of changes in the surface of textiles subjected to plasma chemical treatment using attenuated total reflectance-fourier transform infrared spectroscopy
<p>Plasma chemical oxidation has been proposed as a “nondestructive” method for preparing samples from archaeological materials for radiocarbon dating using accelerator mass spectrometry. However, the chemical effects of low-temperature, low-pressure plasma discharges on fragile archaeological …
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Detailed paleoclimatic records from late Pennsylvanian polygenetic paleosols : north-central Texas, USA.
… rise in the other. Reconstructed physical and wet chemical soil properties indicate these paleosols were finely textured, fertile, and void of salinity problems. Paleoatmospheric pCO₂ estimates from the δ¹³C values of pedogenic calcite nodules indicate values near pre-industrial levels …
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Magneto-Optical Study of Cobalt Ferrite Nanoparticles
… nanoparticles were produced using a generic wet-chemical synthesis procedure. Stoichiometric amounts of Fe2+, Fe3+ and Co2+ salts are dissolved in a non-aqueous polar medium (diethylene glycol). A coprecipitation reaction with sodium hydroxide produces ferrite nanoparticles with average …
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Second-harmonic generation as a probe of chemically modified Si(111) surfaces and the initial oxidation of hydrogen terminated Si(111)
… monolayers. The surfaces are prepared using wet chemical modification to form -H, -C 10 H 21 (decyl) and -O-C 10 H 21 (decyloxy) monolayers. The SHG efficiency for these surfaces as well as a Si(111) surface with a native oxide film is reported. The signal's intensity and modulation through a …
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A spectroscopic study of paint
… investigated. These included visual microscopy, wet chemical tests, thin layer chromatography (TLC), infrared spectroscopy (IR), Raman spectroscopy and pyrolysis-gas chromatography (Py-OC). Attenuated total reflectance (ATR) IR spectroscopy provided non-destructive discrimination between the …
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Process Development and Characterization of AlGaN/GaN Heterostructure Field-Effect Transistors
… plasma reactive ion etching was pursued. A wet chemical etching process called photoelectrochemical etching was also investigated.
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Surface-interface states and the Hall effect measurement of epitaxial and semi-insulating liquid-encapsulated Czochralski gallium arsenide
… The surface-potential changes were induced by wet chemical treatments in ammonium hydroxide and hydrogen peroxide to modify the surface-interface state distribution. The experimental results for epitaxial GaAs are shown to be well-explained by a mathematical model based on the advanced unified …
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Progress on 2D-MoS2: development of a scalable fabrication method and demonstration of an X-ray detector
… different techniques, including exfoliation, chemical vapor deposition (CVD) and wet chemical synthesis. However, it is still challenging to scale the proposed devices to the industrial level, due to the lack of a versatile fabrication process that ensures both reproducibility and scalability. …
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Synthesis of Nanomaterials for Optical and Catalytic Studies
… in this thesis is focused on developing wet chemical synthesis methods for nanomaterials. Synthesis methodology using cuprous oxide as the Cu source was developed to prepare metallic copper nanoparticles NPs with sizes that can be tuned. Copper particles with sizes ranging from 46 to 90 …
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Theoretical and experimental investigation of chemical pattern etching
The processes occurring during wet chemical etching of partially masked copper surfaces for pattern definition were investigated. Chemical dissolution of rectangular cavities with active copper base and inert photoresist sidewalls was carried out in the presence of flowing acidic cupric chloride …
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