Ordered array of Ag semishells on different diameter monolayer polystyrene colloidal crystals: An ultrasensitive and reproducible SERS substrate

Ag semishells (AgSS) ordered arrays for surface-enhanced Raman scattering (SERS) spectroscopy have been prepared by depositing Ag film onto polystyrene colloidal particle (PSCP) monolayer templates array. The diversified activity for SERS activity with the ordered AgSS arrays mainly depends on the P...

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Bibliographic Details
Published in:Scientific reports 2016-09, Vol.6 (1), p.32314-32314, Article 32314
Main Authors: Yi, Zao, Niu, Gao, Luo, Jiangshan, Kang, Xiaoli, Yao, Weitang, Zhang, Weibin, Yi, Yougen, Yi, Yong, Ye, Xin, Duan, Tao, Tang, Yongjian
Format: Article
Language:English
Subjects:
639/301
639/925
Arrays
Crystals
Fourier transforms
Humanities and Social Sciences
multidisciplinary
Nanoparticles
Physics
Polystyrene
Reproducibility
Rhodamine 6G
Science
Spectroscopy
Spheres
Surfactants
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Summary:Ag semishells (AgSS) ordered arrays for surface-enhanced Raman scattering (SERS) spectroscopy have been prepared by depositing Ag film onto polystyrene colloidal particle (PSCP) monolayer templates array. The diversified activity for SERS activity with the ordered AgSS arrays mainly depends on the PSCP diameter and Ag film thickness. The high SERS sensitivity and reproducibility are proved by the detection of rhodamine 6G (R6G) and 4-aminothiophenol (4-ATP) molecules. The prominent enhancements of SERS are mainly from the “V”-shaped or “U”-shaped nanogaps on AgSS, which are experimentally and theoretically investigated. The higher SERS activity, stability and reproducibility make the ordered AgSS a promising choice for practical SERS low concentration detection applications.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep32314