摘要
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. A variety 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 SAED pattern of the carbon-sphere produced from arc-discharging deposite can be at-tributed to the hexagonal structure of diamond, and its HREM image 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 SAED pattern from glassy-carbon sample displays a cubic-diamond structure. Furthermore, Raman spectra and 13C NMR indicate tetrahedral network of the spheres.
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. A variety 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 SAED pattern of the carbon-sphere produced from arc-discharging deposite can be at-tributed to the hexagonal structure of diamond, and its HREM image 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 SAED pattern from glassy-carbon sample displays a cubic-diamond structure. Furthermore, Raman spectra and 13C NMR indicate tetrahedral network of the spheres.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1997年第1期124-126,共3页
Chemical Journal of Chinese Universities
基金
国家杰出青年科学基金
国家教育委员会"跨世纪人才计划"基金
