Synthesis of the hybrid CdS/Au flower-like nanomaterials and their SERS application

被引:24
|
作者
Yang, Chengxiang [1 ,2 ]
Qing, Chen [1 ,2 ]
Wang, Qianjin [1 ,2 ]
Zhang, Xuejin [3 ]
Lou, Jun [4 ]
Liu, Yingkai [1 ,2 ]
机构
[1] Yunnan Key Lab Optoelect Informat Technol, Kunming 650500, Yunnan, Peoples R China
[2] Yunnan Normal Univ, Inst Phys & Elect Informat, Kunming 650500, Yunnan, Peoples R China
[3] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China
[4] Rice Univ, George R Brown Sch Engn, Mat Sci & NanoEngn, Houston, TX 77005 USA
关键词
The hybrid; CdS/Au; Hydrothermal method; Surface enhanced Raman scattering; Discrete dipole approximation (DDA); Surface plasmon resonance (SPR); ENHANCED RAMAN-SCATTERING; IN-SITU SERS; SILVER NANOPARTICLES; GREEN SYNTHESIS; AU; FABRICATION; GRAPHENE; NANOCOMPOSITES; MONOLAYER; PHOTOCATALYSTS;
D O I
10.1016/j.snb.2019.127218
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The CdS flower-like nanomaterials (FLNMs) were synthesized by a facile hydrothermal method. With the help of the hydrophilic group on polyvinyl pyrrolidone molecules, the CdS FLNMs were decorated with Au nanoparticles (NPs) through in situ chemical reduction of HAuCl4. The hybrid CdS/Au FLNMs were investigated through surface-enhanced Raman scattering (SERS). It is found that they can detect crystal violet, Rhodamine B and malachite green as low as 1.0 x 10(-8) M, 1.0 x 10(-8) M, and 1.0 x 10(-7) M respectively. In addition, the theoretical simulation was carried out by the discrete dipole approximation (DDA) method. It is found that the strong electric field of Au dimer and the coupling electric field between Au NPs and CdS FLNMs makes a significant improvement in SERS. Therefore, the hybrid CdS/Au FLNMs have a potential in applications such as detecting organics.
引用
收藏
页数:11
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