1,721,118 research outputs found
A Special Issue on Advanced Carbon Nanostructures - Nanoscience and Nanotechnology Letters, ISSN: 1941-4900
No full textTree-like carbon nanostructures generated by the action of atomic hydrogen on glassy carbon
No full textNon-planar graphitic nanostructures have been generated by the reaction of atomic hydrogen with glassy carbon. The process allowed us to generate unconventional graphite-based tree-like deposits protruding from the tips of the etched glassy carbon surface. An individual tree-like deposit has dimensions ranging between 0.5 and 4 μm and is a porous aggregate of polyhedral nanoparticles and curled nanofilaments. Micro-Raman spectroscopy and electron diffraction have been used to monitor the structural modifications induced in the material. The Raman analysis of the bonding arrangement in the tree-like deposits indicates that exclusively sp 2-coordinated C atoms form these unusual carbon structures. © 2001 Elsevier Science B.V
Development of different carbon phases during diamond film growth by CVD on glassy carbon substrates
No full textTh epaper reports on the structural investigation of different carbon phases generated during the hot filament chemical vapour deposition (HFCVD) of diamond films on glassy carbon substrates. The reflection high energy electron diffraction (RHEED) analysis, performed on both front- and back-side of the removed film and on the substrate surface before and after the coating process, enabled to identify four distinct carbon phases in the transition from glassy carbon to Fd3m cubic diamond structure. In particular the present investigation revealed the occurrence, in the bottom layer of the film, of a face-centered-cubic diamond polytype (X-diamond) belonging to the space group F4-3m. The findings of our research seem to indicate an evolution of carbon species towards lattices with increasing symmetry
Yield of Magnesium Isotopes by Intermediate-energy, Photon-induced, Spallation in Natural Chlorine.
No full textTargets of LiCl (natural Cl) were irradiated with bremsstrahlung beams in the energy range 0.3-1 GeV and the mean cross-sections per photon were deduced for the prodn. of 27Mg and 28Mg from 35,37Cl. Comptete agreement was found between the experimentally determined yields and those calculaied by using a modified CDMD Rudstam formula
Correlation between interfacial microstructure and crystalline quality of diamond films grown on AlN
No full textInfluence of different Carbon structures on Diamond synthesis by Chemical Vapour Deposition
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Diamond films CVD synthesis on Titanium: experimental evidence of the intermediate phases at the film/substrate interface
No full textMat. Res. Soc. Symp. Proc
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