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SERS detection of 4-Aminobenzenethiol based on triangular Au-AuAg hierarchical-multishell nanostructure.

A new interesting article has been published in Spectrochim Acta A Mol Biomol Spectrosc. 2018 Nov 5;204:754-762. doi: 10.1016/j.saa.2018.06.105. Epub 2018 Jun 30. and titled:

SERS detection of 4-Aminobenzenethiol based on triangular Au-AuAg hierarchical-multishell nanostructure.

Authors of this article are:

Zhu J, Wu N, Zhang F, Li X, Li J, Zhao J.

A summary of the article is shown below:

The surface-enhanced Raman signals of 4-Aminobenzenethiol (4-ABT) adsorbed on the surface of triangular Au-AuAg hierarchical-multishell nanostructure have been investigated. Here, the approach to produce core-cavity-shell sandwich nanostructures presented as Au-AuAg is the same as preparing metal nanoparticles with hollow morphology, in which the galvanic replacement reaction takes place between silver and chloroauric acid. In this paper, we directly mix 4-ABT with gold nanoparticles and drop it on glass slides to study the effect of nanoparticles on signal enhancement of Raman spectrum, avoiding the cumbersome process of preparing metal-molecular-metal three-layer structure as reported. A significant increase in the SERS intensity of b2 mode around 1140 cm-1 was observed, which could quantify the concentration of 4-ABT indirectly. In a certain range, the Raman intensity gradually increases with the increasing intermediate gap, which has a strong relationship with dipole plasmon hybridization of core-dielectric-shell sandwich nanostructure. Moreover, Raman spectrum results show that the Au-AuAg substrate can produce signal intensity about 3.8 × 102 times stronger than that of 4-ABT alone and the detection limit was as low as 0.1 μM in solution.

Check out the article’s website on Pubmed for more information:



This article is a good source of information and a good way to become familiar with topics such as:

4-Aminobenzenethiol;Hierarchical-multishell nanostructure;SERS (Surface-enhanced Raman scattering);Triangular Au-AuAg

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