Shell thickness-controlled synthesis of Au@Ag core-shell nanorods structure for contaminants sensing by SERS

被引：12

作者：

Lan Thi Dang ^{[1
]}

Huy Le Nguyen ^{[1
]}

Hai Van Pham ^{[2
]}

Mai Thi Tuyet Nguyen ^{[1
]}

机构：

[1] Hanoi Univ Sci & Technol, Sch Chem Engn, 1 Dai Co Viet Rd, Hanoi, Vietnam

[2] Hanoi Natl Univ Educ, Fac Phys, 136 Xuan Thuy St, Hanoi, Vietnam

来源：

NANOTECHNOLOGY | 2022年 / 33卷 / 07期

关键词：

nanorods; contaminants; gold; silver; SERS; core-shell structure; ENHANCED RAMAN-SCATTERING; GOLD NANORODS; CHROMATOGRAPHY; FENOBUCARB; CARBOFURAN; REDUCTION; RESIDUES; CARBARYL;

D O I：

10.1088/1361-6528/ac201a

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The accessibility of contaminants detection methods is urgently required for environmental and food safety control. In this report, we developed the Au@Ag core-shell nanorod structures for contaminants sensing by surface-enhanced Raman spectroscopy (SERS). The silver shell thickness and the corresponding plasmon wavelength of Au@Ag core-shell nanorods were tuned by changing the coating time and the silver precursor amount. Moreover, these structures exhibit ultra-sensitive detection ability for Nile blue A dye and Fenobucarb pesticide sensing by SERS. Interestingly, the highest Raman enhancement factor is obtained for the Au@Ag core-shell sample with a minimal silver shell thickness leaded by the optimal enhancement of the electromagnetic field of bimetallic structures. Hence, our report demonstrates that the combination of unique features of two plasmonic metals into core-shell structures promises potential applicability in SERS-based analysis.

引用

页数：8

共 31 条

[11] Rapid nondestructive detection of mixed pesticides residues on fruit surface using SERS combined with self-modeling mixture analysis method [J].