Enhanced optical properties of ZnO nanorods decorated with gold nanoparticles for self cleaning surface enhanced Raman applications
ISSN
1694332
Năm xuất bản
2020
Tác giả
Doan Q.K.
Division of Computational Physics, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Viet Nam
Nguyen M.H.
Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Viet Nam
Faculty of Physics, VNU University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai, Thanh Xuan, Hanoi, Viet Nam
Pham V.T.
Department of Physics, Faculty of Basic – Fundamental Sciences, Vietnam Maritime University, 484 Lach Tray – Le Chan, Hai Phong, Viet Nam
Institute of Research and Development, Duy Tan University, 03 Quang Trung, Danang, Viet Nam
Department of Physics, Faculty of Basic Science, University of Mining and Geology, Duc Thang, Tu Liem, Hanoi, Viet Nam
Nguyen T.T.
Ho K.H.
Tran T.H.
DOI
10.1016/j.apsusc.2019.144593
Tóm tắt
Raman is a very useful tool to identify chemical substances. However, Raman signal is normally not very strong and hence it is important to fabricate surface enhance Raman scattering (SERS) substrates of good repeatability and high enhancement factor. In this study, ZnO nanorods were prepared by a facile hydrothermal process assisted with galvanic effect. Gold nanoparticles were decorated on the as-prepared nanorods by sputtering method. The results showed that the Au nanoparticles enhance photoluminescence, Raman scattering and photocatalyst properties of ZnO nanorods. The ZnO@Au based SERS substrate showed high enhancement factor and can detect methylene blue at low concentration of 10–9 M. In combination with self cleaning under UV irradiation, the ZnO@Au SERS substrates can be reusable and hence it is promising for quantitative analyzing based on Raman scattering. © 2019 Elsevier B.V.