Designed Growth of AgNP Arrays for Anti-counterfeiting Based on Surface-Enhanced Raman Spectroscopy Signals

Zhifeng Yang; Xiaoyu Zhao; Jia Liu; Jiahong Wen; Fengyi Zhang; Xiaojie Guo; Kun Zhang; Jian Zhang; Aofang Wang; Renxian Gao; Yaxin Wang; Yongjun Zhang

doi:10.1021/acsami.2c12124

Designed Growth of AgNP Arrays for Anti-counterfeiting Based on Surface-Enhanced Raman Spectroscopy Signals

ACS Appl Mater Interfaces. 2022 Oct 28. doi: 10.1021/acsami.2c12124. Online ahead of print.

Authors

Zhifeng Yang¹, Xiaoyu Zhao¹, Jia Liu¹, Jiahong Wen^{2

3}, Fengyi Zhang¹, Xiaojie Guo¹, Kun Zhang¹, Jian Zhang¹, Aofang Wang⁴, Renxian Gao⁵, Yaxin Wang¹, Yongjun Zhang¹

Affiliations

¹ College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou310018, P. R. China.
² The College of Electronics and Information, Hangzhou Dianzi University, Hangzhou310018, P. R. China.
³ Zhejiang Laboratory, Hangzhou311100, P. R. China.
⁴ Medical School of Hangzhou Dianzi University, Hangzhou310018, P. R. China.
⁵ College of Physical Science and Technology, Xiamen University, Xiamen361005, P. R. China.

PMID: 36305677
DOI: 10.1021/acsami.2c12124

Abstract

Based on etched PS sphere arrays, the different growths of Ag nanoparticles with tunable LSPR are designed when SiO₂-25 nm/Ag-30 nm/SiO₂-100 nm sandwich nanocavity structures are annealed at 500 °C, including the hexagonal silver nanoparticle rings, circular silver nanoparticle rings, and aggregated silver nanoparticles. The uniformity of particle size and regularity of position generate enhanced electromagnetic field and good surface-enhanced Raman spectroscopy signals as confirmed by UV-vis observation and finite difference time domain method simulation. The developed nanostructures are effectively used as stable, nonreproducible, and markable anti-counterfeiting signs.

Keywords: Ag nanoparticles; FDTD simulation; PS sphere array; SERS substrate; anti-counterfeiting.