Charge Transfer in Patterned Bilayer Film of Ag/ZnS Composite by Magnetron Control Sputtering

Yongjun Zhang; Hailong Zhou; Lijun Liang

doi:10.3390/molecules27123805

Charge Transfer in Patterned Bilayer Film of Ag/ZnS Composite by Magnetron Control Sputtering

Molecules. 2022 Jun 13;27(12):3805. doi: 10.3390/molecules27123805.

Authors

Yongjun Zhang¹, Hailong Zhou², Lijun Liang^{1

3}

Affiliations

¹ Center for Advanced Optoelectronic Materials, Key Laboratory of Novel Materials for Sensor of Zhejiang Province, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
² Zhejiang Sunflux Electron Co., Ltd., Shaoxing 311266, China.
³ College of Automation, Hangzhou Dianzi University, Hangzhou 310018, China.

Abstract

Ordered heterojunction nanocap arrays composed of the bilayer film Ag/ZnS were prepared onto ordered two-dimensional polystyrene bead arrays by magnetron control sputtering, and the surface morphologies were tuned by changing the ZnS thickness. When the ZnS thickness varied from 10 to 30 nm with a Ag thickness of 5 nm, the roughness of the bilayer film Ag/ZnS increased obviously. The UV-VIS spectra showed the shifted LSPR peaks with ZnS thickness, which was attributed to the changes of the electron density as confirmed by Hall effect analysis. SERS observations confirmed the charge transfer process for the varied electromagnetic couplings when the ZnS thickness changed.

Keywords: Ag/ZnS bilayer film; SERS; nanocap arrays.

Abstract

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