金纳米颗粒对l -半胱氨酸的光学和电化学性质的尺寸依赖性

IF 2.2 4区 工程技术 Q2 Chemistry
Pengfei Cao, Nan Wang, Duo Chen, Shengjun Sun, Houyi Ma, Meng Lin
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引用次数: 4

摘要

以柠檬酸盐为还原剂和稳定剂,采用分步生长法制备了一系列金纳米颗粒。分析了最大吸收波长(λmax)的光学性质和氧化电位(Ep)随粒径变化的电化学性质。推导了由紫外可见光谱和电化学氧化峰计算粒径的方法,符合理论预测趋势,与前人的观测结果一致。此外,我们还以l -半胱氨酸为靶,研究了基于电化学催化活性和球形金纳米粒子聚集的应用性能。结果表明,金纳米粒子对l -半胱氨酸的光学和电化学性能与金纳米粒子的粒径密切相关。随着纳米颗粒尺寸的增大,紫外可见吸收光谱中半最大值全宽度增大,电化学氧化电位呈正位移。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Size-dependent optical and electrochemical properties of gold nanoparticles to L-cysteine

Size-dependent optical and electrochemical properties of gold nanoparticles to L-cysteine

A series of gold nanoparticles were synthesized by stepwise growth method under the condition of citrate as a reducing agent and stabilizer. The optical properties with the maximum absorption wavelength (λmax) and electrochemical properties of the oxidation potential (Ep) dependence on the particle size were analyzed. The method of calculating the particle size from the UV-visible spectrum and the electrochemical oxidation peak was deduced, following the theoretical prediction trend and consistent with previous observations. Furthermore, we investigated the application performance based on the electrochemical catalytic activity and the aggregation of the spherical gold nanoparticles using L-cysteine as a target. The results indicated that the optical and electrochemical properties of the gold nanoparticles to L-cysteine were closely related to the particle size of gold nanoparticles. With the increased size of the nanoparticles, the full width at half maximum in the UV-visible absorption spectrum increased and the electrochemical oxidation potential was positively shifted.

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来源期刊
Gold Bulletin
Gold Bulletin 工程技术-材料科学:综合
CiteScore
3.30
自引率
4.50%
发文量
0
审稿时长
3 months
期刊介绍: Gold Bulletin is the premier international peer reviewed journal on the latest science, technology and applications of gold. It includes papers on the latest research advances, state-of-the-art reviews, conference reports, book reviews and highlights of patents and scientific literature. Gold Bulletin does not publish manuscripts covering the snthesis of Gold nanoparticles in the presence of plant extracts or other nature-derived extracts. Gold Bulletin has been published over 40 years as a multidisciplinary journal read by chemists, physicists, engineers, metallurgists, materials scientists, biotechnologists, surface scientists, and nanotechnologists amongst others, both within industry and academia. Gold Bulletin is published in Association with the World Gold Council.
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