Selective SERS Sensing of R6G Molecules Using MoS2 Nanoflowers under Pressure

被引:1
|
作者
Yu, Hongyan [1 ,2 ]
Chen, Yongxue [1 ,2 ]
Wen, Zhenyu [1 ,2 ]
Wang, Rensheng [1 ,2 ]
Jia, Sisi [1 ,2 ]
Zhu, Wenjie [1 ,2 ]
Song, Yanping [1 ,2 ]
Sun, Huanhuan [1 ,2 ]
Liu, Bingbing [3 ]
机构
[1] Zhejiang Normal Univ, Key Lab Solid State Optoelect Devices Zhejiang Pro, 688 Yingbin Ave, Jinhua 321004, Peoples R China
[2] Zhejiang Normal Univ, Zhejiang Inst Photoelect, Coll Phys & Elect Informat Engn, 688 Yingbin Ave, Jinhua 321004, Peoples R China
[3] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Peoples R China
基金
芬兰科学院; 中国国家自然科学基金;
关键词
RAMAN-SCATTERING; MONOLAYER; BULK;
D O I
10.1021/acs.langmuir.4c02991
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Pressure-induced surface-enhanced Raman spectroscopy (PI-SERS) has garnered significant attention as a subfield of SERS detection due to its capacity to regulate the band gap between molecules and substrates through pressure modulation. Currently, SERS detection primarily focuses on single molecules at atmospheric pressure with limited investigations conducted under high pressure conditions. Herein, we employed rose-shaped MoS2 nanoflowers as the SERS substrate and realized selective PI-SERS enhancement of R6G molecules in the binary (MV+R6G) and ternary (MV+R6G+RhB) systems. The MoS2 demonstrated an exceptionally low SERS detection limit of 5 x 10(-6) M in binary and ternary systems with equimolar amounts of molecules. High-pressure experimental results indicate that MoS2 displays selective enhancement for R6G molecules, as evidenced by the comparison of the PI-SERS peak intensity ratio between MoS2 and the probe molecules. The proposed enhancement mechanism in binary and ternary SERS systems under high pressure involves pressure-induced changes in both the band structures of the MoS2 substrate and molecules, thereby influencing their charge transfer dynamics. Consequently, this approach holds great promise for practical applications in complex SERS systems operating under extreme conditions.
引用
收藏
页码:21804 / 21813
页数:10
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