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北京石油化工学院2026年研究生招生接收调剂公告
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明翰翻译

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fjtony163: 屏蔽内容 2016-07-29 00:01:49
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2楼2016-07-28 19:24:33
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华丨仔: 金币+30, ★★★很有帮助 2016-08-02 01:02:04
Combining with the relevance of size and coordination number, to analyze the reduction of size by the theory of bond relaxation developed recently. The atomic cause of  softening-redshift phenomenon of  Raman spectrum are listed as follows: nanoscale sise of bulk materials will directly cause that ratio of volume to surface increases, coordination number reduces, bond length contraction, bond energy enhances. The function of small-size materials, Raman frequent shift and bond parameters (coordination, bond length and bong energy) has been built. The bond length, bond energy, efficiency coordination number and Raman reference frquency value were acquired by quantitative measurement under different size, which provide physical parameters for the further research of carbon-materials physical property at small size.
3楼2016-07-29 22:11:08
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4楼2016-07-29 22:12:51
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武汉一心一译

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华丨仔: 金币+20, ★★★很有帮助 2016-08-02 01:02:17
从 小尺寸 与 配位数 的关联性 出发,应用 近期发展的 键弛豫理论系统的 分析 碳材料 尺寸减小,其 拉曼谱 发生 红移软化现象 的 原子起因:块体材料 减小 到 纳米尺寸,将 直接导致 材料的 体表比 增大、配位数 减少、化学键 键长 收缩变短、键能增强。建立了 小尺寸材料 —拉曼频移 —键参数 (配位数、键长和键能)三者之间的 函数关系式。定量得到了 不同尺寸下,碳材料的 键长、键能、有效配位数 和 拉曼参考频率值,为深入 研究 小尺寸下的 碳材料 物理特性 提供了 物理参数。
Based on the correlation between small size and coordination number of carbon material, this paper analyzed the atomic causes for the decreasing size of carbon material as well as for red shift and softening of its Raman spectrum using the recently developed bond relaxation theory system. Results showed that the size of bulk material which was decreased into nanoscale will directly lead to enlarged surface area ratio, decreased coordination number and shortened bond length, and strengthened bond energy. In addition, we built the function relatione equation among small-size material- Raman frequency shift- bond parameters (coordination number, bond length and bong energy). Based on this equation, we quantitatively calculated  the bond length, bond energy, effective coordination numbers and reference Raman frequency value of small size carbon materials, as thus provide physical parameters for the research of physical properties of small size carbon materials.
5楼2016-07-30 12:01:41
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