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Direct growth of self-aligned spindle-shape graphene nanoribbons (GNRs) on SiC(11-20) substrate is demonstrated. It is found all the GNRs are monolayer and one of edges of each endpoint of GNR is along direction of zigzag-edge. The length directions of the GNRs are all coincided with the [0001] direction of SiC due to the anisotropy surface energy of SiC. Furthermore, the doping type of GNRs is p-type...
We demonstrate the growth of high quality single-walled carbon nanotube (SWCNT) forests on commercial Cu foils by cold-wall chemical vapor deposition. Time-of-flight secondary ion mass spectrometry was employed to study the effect of annealing on the catalyst evolution with or without an AlOx barrier layer. X-ray photoelectron spectroscopy was used to investigate the chemical states of the catalyst...
Oxidation debris (OD) and graphene oxide (GO) before and after OD removal were characterized by Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, mass spectroscopy, X-ray diffraction, transmission electron microscopy and potentiometric titration, respectively. OD removal decreased GO absorption intensity in UV/Vis spectra, caused changes in peak position and absorption intensity...
We demonstrate the direct growth of carbon nanotube (CNT) forests on metallic titanium (Ti) coatings by single-step chemical vapor deposition. This was achieved by catalyst engineering, which involves a novel design of Fe/Ti/Fe nanostructure sputtering coated on SiO 2 /Si wafers. The Fe sublayer, an additional catalyst added to the conventional catalyst/support design, plays a key role in...
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