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首页> 外文期刊>The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry >A rapid method to estimate the concentration of citrate capped silver nanoparticles from UV-visible light spectra
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A rapid method to estimate the concentration of citrate capped silver nanoparticles from UV-visible light spectra

机译：从紫外可见光谱估算柠檬酸盐封端的银纳米颗粒浓度的快速方法

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摘要

We present a generalized table of extinction coefficient data for silver nanoparticles from 8 to 100 nm. This table allows for easy and quick estimation of the concentration and size of modified and mono-dispersed silver nanoparticles from their optical spectra. We obtained data by determining the silver content of citratestabilised silver nanoparticles using sodium cyanide to dissolve the nanoparticles, and measuring solution conductivity with a pH meter and a cyanide-ion selective electrode. The quantification of the silver ion concentration enabled the calculation of extinction coefficients. Experimentally calculated extinction coefficients, in the current work, are in good agreement with collated literature values measured by different authors with non-standardized methodology and each for a limited range of particle size. They are also in good agreement with our theoretical calculations using Mie theory. Thus, we provide a highly standardized and comprehensive tabulated reference data-set.
机译：我们提出了8至100 nm纳米银颗粒的消光系数数据的广义表。该表允许根据其光谱轻松，快速地估算改性和单分散的银纳米颗粒的浓度和大小。我们通过使用氰化钠溶解纳米颗粒确定柠檬酸盐稳定化的银纳米颗粒中的银含量，并使用pH计和氰化物离子选择性电极测量溶液的电导率来获得数据。银离子浓度的定量使得能够计算消光系数。在当前工作中，通过实验计算得出的消光系数与不同作者使用非标准化方法测得的整理后的文献值非常吻合，并且每个文献都针对有限的粒径范围。它们也与我们使用米氏理论进行的理论计算非常吻合。因此，我们提供了高度标准化和全面的列表化参考数据集。

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