Novel one-pot fabrication of lab-on-a-bubble@Ag substrate without coupling-agent for surface enhanced Raman scattering.
Novel one-pot fabrication of lab-on-a-bubble@Ag substrate without coupling-agent for surface enhanced Raman scattering.
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用于表面增强拉曼散射的无耦合剂的 Lab-on-a-Bubble@Ag 基底的新型一锅法制造
DOI：
10.1038/srep03942
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发表时间：
2014-02-03
影响因子：
4.6
通讯作者：
Tang H
中科院分区：
文献类型：
--
作者：
Jiang J;Ou-Yang L;Zhu L;Zou J;Tang H
通过原位还原硝酸银，将银包覆在空心二氧化硅微球上，制备了一种表面增强拉曼散射（Sers）基底。漂浮在溶液表面的银包被的LoBs（LoBs@Ag）可以为检测溶液中的目标分子提供非常方便的平台。LoBs@Ag基底不仅将均匀分布的Ag纳米颗粒固定在LoBs表面，而且排除了偶联剂的干扰。这产生了高分辨率的Sers光谱，具有良好的再现性。采用密度泛函理论（DFT）和表面增强拉曼散射（Sers）方法研究了结晶紫（CV）在LoBs@Ag基底上的吸附行为。LoBs@Ag基底对CV具有显著的拉曼增强效应，增强因子为6.9 × 108，对染料、农药和生物分子具有广泛的适应性。在此基础上，提出了一种简单、灵敏的Sers方法，用于痕量有机污染物或生物分子的测定。
Through in-situ reduction of silver nitrate without using any coupling-agent, a substrate for surface-enhanced Raman scattering (SERS) was prepared by coating silver on hollow buoyant silica microspheres as a lab on a bubble (LoB). The silver coated LoBs (LoBs@Ag) floated on surface of a solution could provide a very convenient platform for the detection of target molecules in the solution. The LoBs@Ag substrate not only immobilized well-distributed Ag nanoparticles on the surface LoBs, but excluded the interference of coupling agents. This yielded high-resolution SERS spectra with excellent reproducibility. The adsorption of crystal violet (CV) on the LoBs@Ag substrate was investigated by means of SERS combined with density functional theory (DFT) calculations. The LoBs@Ag substrate exhibited a remarkable Raman enhancement effect for CV with an enhancement factor of 6.9 × 108 and wide adaptability from dye, pesticide to bio-molecules. On the basis of this substrate, a simple and sensitive SERS method was proposed for the determination of trace organic pollutants or bio-molecules.
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影响因子：
2.8
作者：
Kudelski, A
通讯作者：
Kudelski, A
影响因子：
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作者：
GAO, P;WEAVER, MJ
通讯作者：
WEAVER, MJ
影响因子：
5.7
作者：
Chakraborty, Indranath;Bag, Soumabha;Pradeep, Thalappil
通讯作者：
Pradeep, Thalappil
影响因子：
3.7
作者：
Hu, Gengshen;Feng, Zhaochi;Li, Can
通讯作者：
Li, Can
影响因子：
15
作者：
ITO, M;WEST, R
通讯作者：
WEST, R