| 胶体分形聚集体分维数与随时间变化的SERS强度关系研究 |
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| 引用本文： | 张宏光,刘凡镇,等.胶体分形聚集体分维数与随时间变化的SERS强度关系研究[J].高等学校化学学报,1993,14(2):261-262. |
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| 作者姓名： | 张宏光 刘凡镇 |
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| 作者单位： | [1]中国科学技术大学近代化学系，结构分析开放实验室，合肥230026 [2]中国科学技术大学近代化学系，结构分析开放实 |
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| 摘 要： | 由于胶体聚集的动力学过程可用分形理论描述,从而对胶体动力学生长机制有了新的理解。Lin等研究了金胶、硅胶及聚乙烯乳胶的直接光散射后认为,胶体的两种生长机制DLCA和RLCA聚集体具有不依赖于胶体个性的普适分数维。对这一结果用不同方法对不同胶体进行验证十分必要。我们曾研究了吡啶吸附于AgBr胶体随时间变化的SERS规律,本文进一
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| 关 键 词： | 胶体 聚集 分维数 表面增强Raman散射 动力学 分形理论 聚集体 生长机制 |
A Study of Relationship Between Time Dependent SERS Intensity and Fractional Dimension of Colloidal Fractional Aggregates |
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| ZHANG Hong-Guang,LIU Fan-Zhen,HE Tian-Jing,XN Hou-Wen.A Study of Relationship Between Time Dependent SERS Intensity and Fractional Dimension of Colloidal Fractional Aggregates[J].Chemical Research In Chinese Universities,1993,14(2):261-262. |
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| Authors: | ZHANG Hong-Guang LIU Fan-Zhen HE Tian-Jing XN Hou-Wen |
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| Institution: | ZHANG Hong-Guang,LIU Fan-Zhen,HE Tian-Jing,X1N Hou-Wen |
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| Abstract: | The relations between time dependent SERS intensity and fractional dimension of colloidal fractional aggregates formed in both the diffusion and the reaction limited regimes were established in the paper. According to the relationship, the fractional dimensions of silver bromide colloid aggregates formed in the two regimes were given by the time dependent SERS intensity of adsorbed pyridine in AgBr sol, they are in good agreement with the universal value and suggest that SERS will be a useful tool in the study of kinetics of colloid aggregation, especially in the study of fractional structure of colloidal aggregates. |
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| Keywords: | Colloidal aggregation Fractional dimension Surface enhanced Raman scattering(SERS) |
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