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In this study, the catalytic activities of Raw CNTs and Co/CNTs for CO removal were determined between 100 and 300°C. To confirm the characterization of Raw CNTs and Co/CNTs, the composition and morphology of two catalysts were analyzed by using XRD, SEM, TEM and Raman spectra. The results showed that the CO conversion was 98% by using Raw CNTs at 250°C and this conversion was similar to that of using...
In this study, a simple potassium hydroxide (KOH) treatment was applied to functionalize the surface and to modify the structures of multi-walled carbon nanotubes (CNTs) grown on silicon substrates by thermal chemical vapor deposition (thermal CVD). Scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, and energy dispersive spectrometer (EDS) were employed...
Large area synthesis of graphene has been realized on top of a nickel-coated micro platform using the Micro Chemical Vapor Deposition (Micro-CVD) system. The capability of ultra-fast heating and cooling provided by the MEMS platform is crucial for the controlled growth of graphene. Theoretical analysis shows that cooling rate is about 4 orders of magnitude higher than the conventional CVD system....
Arrays of silicon nanowire/multiwalled carbon nanotube nanocomposite have been synthesized by wet etching through electroless metal deposition and chemical vapor deposition. Vertically aligned Si nanowire arrays with controlled diameter and length were fabricated by Ag nanodendrite-assisted wet chemical etching of n-type or p-type silicon wafers using HF/AgNO3 solution. The composite structure was...
Silicon germanium carbon with up to 1.5% of substitutional carbon can be grown epitaxially on Si(001) by rapid thermal chemical vapor deposition (RTCVD) using methylsilane as a precursor. The germanium and carbon atomic distributions are studied for a C-rich Si l-x-y Ge x C y heterostructure using high-resolution transmission electron microscopy (HREM),...
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