Hydrothermal synthesis of AgSiO sub(2)g three core-shell nanoparticles and their sensitive and stable SERS properties

An AgSiO sub(2)g three core-shell architecture was synthesized by a facial hydrothermal method. The features of the sample were characterized by SEM, TEM, and AFM images, EDS analyses and absorption spectra. This novel nanostructure exhibited excellent SERS properties due to the formation of hot spo...

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Published in:Nanoscale 2016-02, Vol.8 (9), p.4908-4914
Main Authors: Jiang, Tao, Wang, Xiaolong, Zhou, Jun, Chen, Dong, Zhao, Ziqi
Format: Article
Language:English
Subjects:
Facial
Homogeneity
Hot spots
Immunoassay
Mathematical analysis
Nanoparticles
Nanostructure
Synthesis
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creator Jiang, Tao
Wang, Xiaolong
Zhou, Jun
Chen, Dong
Zhao, Ziqi
description An AgSiO sub(2)g three core-shell architecture was synthesized by a facial hydrothermal method. The features of the sample were characterized by SEM, TEM, and AFM images, EDS analyses and absorption spectra. This novel nanostructure exhibited excellent SERS properties due to the formation of hot spots around the inner and outer Ag NPs, which were identified by theoretical calculations. A detection limit of the analyte molecule was obtained as low as 10 super(-11) M by using this SERS nanostructure. Moreover, the homogeneity of SERS signals from the three core-shell nanostructure was checked by Raman mapping. Our studies show that the unique AgSiO sub(2)g three core-shell nanostructure has significant potential to realize a SERS substrate with both sensitivity and stability, which are important in SERS-based immunoassay.
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subjects Facial
Homogeneity
Hot spots
Immunoassay
Mathematical analysis
Nanoparticles
Nanostructure
Synthesis
title Hydrothermal synthesis of AgSiO sub(2)g three core-shell nanoparticles and their sensitive and stable SERS properties
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