Production of Diamond Nanospherulite at Carbon-Water Interface by Laser Ablation and Its Characterization by TEM

Abstract

Abstract: Carbon nanoparticle appearing in perfect spherical shape, with sizes varying from tens nanometers to several micrometers, can be produced by pulsed-laser ablating different elementary carbon samples immersed in water.Avariety of samples including HOPG,graphite, arcdischarging deposite, glassy-carbon and imitation-diamond have been tried.The yield of the diamand nanospherulite is found to depend on the structure of the sample.The SAEDpattern of the carbon-sphere produced from arc-discharging deposite can be at-tributed to the hexagonal structure of diamond, and its HREMimage exihibits 0.38nm×0.31 nm lattice, which is just three times of the distances for (110) (d=0.126 nm) and (004) (d=0.1030nm) crystal layers of hexagonal diamond, respectively.While the SAEDpattern from glassy-carbon sample displays a cubic-diamond structure.Furthermore, Raman spectra and ¹³C NMRindicate tetrahedral network of the spheres.

Key words: Diamond, Nanospherulitic, Laser ablation, TEM

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WANG Yu-Huang, YU Rong-Qing, LIU Zhao-Yang, HUANG Rong-Bin, ZHENG Lan-Sun, ZHANG Xiao-Feng, HU Gang, ZHANG Ze. Production of Diamond Nanospherulite at Carbon-Water Interface by Laser Ablation and Its Characterization by TEM[J]. Chem. J. Chinese Universities, 1997, 18(1): 124.

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Production of Diamond Nanospherulite at Carbon-Water Interface by Laser Ablation and Its Characterization by TEM

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