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Diamond nanospherulite: A novel material produced at carbon-water interface by pulsed-laser ablation
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作者 王育煌 黄群健 +2 位作者 陈忠 黄荣彬 郑兰荪 《Science China Chemistry》 SCIE EI CAS 1997年第6期608-615,共8页
Formation of carbon nanoparticles with perfectly spherical.shape and diamond structure (diamond nanospherulite) by laser-ablating a variety of carbon samples in water is reported for the first time The studies reveal ... Formation of carbon nanoparticles with perfectly spherical.shape and diamond structure (diamond nanospherulite) by laser-ablating a variety of carbon samples in water is reported for the first time The studies reveal that molten carbon nanoparticles generated by laser ablation are quenched directly by water and end up as diamond nanospherulites,possibly due to the high pressure arising from surface tension and the high stability resulting from termination of dangling bonds with hydrogen atoms. 展开更多
关键词 diamond nanospherulite laser ablation tem
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纳米金刚石球晶的激光溅射产生与透射电镜表征 被引量:10
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作者 王育煌 余荣清 +5 位作者 刘朝阳 黄荣彬 郑兰荪 章效锋 胡刚 张泽 《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
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.... 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. 展开更多
关键词 金刚石 球晶 激光溅射 透射电镜 纳米材料
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