Publications (2)2.34 Total impact
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Article: Step bunching behavior on (111) surface of diamond single crystal
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ABSTRACT: Meandering and triangular macrostep trains on (1 1 1) surface of diamond single crystals grown from Fe–Ni–C system under high-pressure and high-temperature (HPHT) were for the first time systemically revealed by atomic force microscopy (AFM). The height of macrosteps is in a range from 10 to 26 nm, which about several tens times unit cell parameter of diamond single crystal. The formation mechanism of the meandering and triangular macrosteps was discussed through consideration of adsorbed impurity on the growing step, the interlay between step energetics (repulsive step interaction) and kinetics (asymmetric step kinetics) on the growing diamond crystal surface.Chemical Physics Letters. -
Article: Diamond homo-epitaxial growth from iron carbide under high temperature–high pressure
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ABSTRACT: Diamond seed crystals were treated with Fe3C powders under high temperature and high pressure (HPHT). AFM images reveal that high quality homo-epitaxial diamond have been successfully grown on the diamond seed. The homo-epitaxial grown diamond film was also confirmed by laser Raman spectra and a net positive weight gain of the diamonds. It was suggested that homo-epitaxial diamond film could be formed through decomposition of iron carbide under HPHT. This study provides direct evidence for diamond formation directly through decomposition of transition metal carbide, and sets up a very effective way to realize diamond growth different from traditional HPHT method using graphite as a carbon source.Chemical Physics Letters 363:211-218. · 2.34 Impact Factor
