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Publikováno v:
Computational Materials Science. 203:111113
The development of super-hard materials has recently focused on systems containing a heavy transition metal and light main group elements. Niobium carbides and nitrides have previously been identified as potential candidates, however, the volatility
Publikováno v:
Diamond and Related Materials. 20:157-164
Bulk properties and stability of the entire series of group 4d transition metal carbides and nitrides are reported in this work. The theoretical calculations were carried out within Local Density Approximation and Generalized Gradient Approximation u
Publikováno v:
Diamond and Related Materials. 17:127-136
Diamond surfaces that are polished both mechanically and manually have been studied using atomic force microscopy and compared with optical micrographs obtained within the Nomarski interference mode. The extra gentle manual polishing which follows th
Autor:
Trevor E. Derry, N.W. Makau
Publikováno v:
Diamond and Related Materials. 15:160-163
Diamond surfaces prepared in the usual way, by polishing with diamond grit mixed with olive oil, are known to be atomically bulk-like (unreconstructed), although the polishing mechanism is still debated. Broken bonds at the surface are normally satur
Autor:
Trevor E. Derry, N.W. Makau
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 555:31-35
We suggest a method by which the thinnest possible uniform isotopic targets may be produced in favourable cases, by bonding a monolayer to a diamond substrate, for use in nuclear level studies at maximum energy resolution. The need to deconvolve the
Autor:
N.W. Makau, Trevor E. Derry
Publikováno v:
Surface Review and Letters. 10:295-301
Nominally clean diamond surfaces have been shown to contain adsorbed foreign atoms on them. Some of the adsorbed atoms have also been known to lead to various surface modifications, a phenomenon that is important in diamond electronics. Establishing
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 22(47)
The properties of hydroxyl groups on C(111)-(1 × 1) and reconstructed (2 × 1) surfaces at different sites and for various coverages are investigated using density functional theory. Out of the adsorption sites considered, i.e. face centred cubic, h
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 22(26)
The structural and electronic properties, stability, optimum coverage and workfunction of oxygen atoms at different sites on the (1 ? 1) unreconstructed and the (2 ? 1) reconstructed C(111) surfaces have been investigated using density functional the
Akademický článek
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