Ag nanoparticle decorated MnO2 flakes as flexible SERS substrates for rhodamine 6G detection

Yan Zhang; Rui Jia Liu; Xiaofei Ma; Xiao Ying Liu; Yu Xin Zhang; Jie Zhang

doi:10.1039/c8ra07778a

Ag nanoparticle decorated MnO₂ flakes as flexible SERS substrates for rhodamine 6G detection

RSC Adv. 2018 Nov 9;8(66):37750-37756. doi: 10.1039/c8ra07778a. eCollection 2018 Nov 7.

Authors

Yan Zhang¹, Rui Jia Liu², Xiaofei Ma³, Xiao Ying Liu⁴, Yu Xin Zhang¹, Jie Zhang²

Affiliations

¹ State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University Chongqing 400044 P. R. China zhangyuxin@cqu.edu.cn.
² The Key Laboratory of Optoelectronic Technology & System, Education Ministry of China, Chongqing University Chongqing 400044 P. R. China zhangjie@cqu.edu.cn.
³ China Academy of Space Technology (Xi'an) Xi'an 710000 P. R. China.
⁴ Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education, College of Environment and Resources, Chongqing Technology and Business University Chongqing 400067 China.

Abstract

Smart design of advanced substrates for surface-enhanced Raman scattering (SERS) activity is challenging but vital. Herein, we synthesized a new kind of AgNPs/MnO₂@Al flexible substrate as a SERS substrate for the detection of the analyte rhodamine 6G (R6G). The fabrication of porous MnO₂ nanoflakes on Al foil was conducted via a facile hydrothermal strategy. Owing to the large active surface area of the MnO₂ nanoflakes, the Ag nanoparticles were immobilized and displayed superior SERS performance with a low detection concentration of 1 × 10^-6 M for R6G. In addition, the SERS performance was found to be strongly related to the morphology of the MnO₂@Al substrate material. Our smart design may provide a new method of construction for other advanced SERS substrates for the detection of R6G.