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Diamond nanospherulite: A novel material produced at carbon-water interface by pulsed-laser ablation
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. 相似文献
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用表面增强拉曼散射光谱(SERS)和时间分辨SERS光谱(TRSERS)等技术首次研究了烯丙基硫脲(ATU)在HClO4、H2SO4和HNO3介质中与无机阴离子在银电极上的电化学共吸附行为.提出ATU很可能以S端与银电极表面形成化学吸附键,仲氨基相对伯氨基距离表面较近,整个分子偏向烯丙基一侧倾斜吸附在表面上.ClO-4、SO2-4和NO-3等弱吸附无机阴离子均能被ATU诱导共吸附在其质子化了的仲氨基上,这3种无机阴离子被ATU诱导共吸附的强弱顺序是ClO-4>SO2-4>NO-3.被诱导共吸附的无机阴离子对ATU在电极表面的化学吸附起到稳定剂的作用,有利于ATU在电极表面形成致密的吸附层 相似文献
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粗糙镍电极上吡啶和二巯基嘧啶的表面拉曼光谱 总被引:1,自引:0,他引:1
粗糙镍电极上吡啶和二巯基嘧啶的表面拉曼光谱①黄群健高劲松蔡雄伟毛秉伟郑明森田中群*(厦门大学化学系,固体表面物理化学国家重点实验室,厦门361005)自从人们发现和认知表面增强拉曼散射(SERS)效应以来[1],SERS技术以其极高的表面灵敏度为电极... 相似文献
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