Core size matters! High Raman enhancing core tunable Au/Ag bimetallic core-shell nanoparticles

IF 2.2 4区 工程技术 Q2 Chemistry Gold Bulletin Pub Date : 2017-10-27 DOI:10.1007/s13404-017-0220-1
Diptiranjan Paital, Tapasi Sen, Amitava Patra, Krishna Kanta Haldar
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引用次数: 9

Abstract

Bimetallic core-shell nanostructures have been attracted tremendous attention due to their ability to form novel materials with unique chemical, optical, and physical properties. Here, we have studied the influence of core size of Au/Ag bimetallic core-shell nanostructures on the Raman enhancement efficiency with the Raman-active probe methylene blue. The surface-enhanced Raman scattering intensity is increased with increase in the core size of Au/Ag bimetallic core-shell nanoparticles. Interestingly, the enhancement factor is found to be 6.58?×?107 for the Au100/Ag core-shell nanoparticles and allows easy detection of analyte methylene blue. Thus, surface-enhanced Raman scattering properties of the metal nanoparticles are significantly enhanced due to the Au/Ag core-shell structures and the enhancement factor is dependent on the size of the core of the bimetallic nanoparticles.

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核心尺寸很重要!高拉曼增强核可调金/银双金属核壳纳米粒子
双金属核壳纳米结构由于具有独特的化学、光学和物理性质而引起了人们的广泛关注。本文利用亚甲基蓝喇曼活性探针研究了金/银双金属核壳纳米结构的核尺寸对喇曼增强效率的影响。金/银双金属核壳纳米粒子的表面增强拉曼散射强度随核尺寸的增大而增大。有趣的是,增强因子为6.58 ×?107为Au100/Ag核壳纳米颗粒,并允许易于检测分析物亚甲基蓝。因此,金属纳米粒子的表面增强拉曼散射性能由于Au/Ag核壳结构而显著增强,并且增强因子取决于双金属纳米粒子核的大小。
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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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