Synthesis of Au@Ag core-shell nanorods with tunable optical properties

被引:0
|
作者
Miryousefi, Navid [1 ]
Varmazyad, Mahboubeh [2 ]
Ghasemi, Forough [1 ]
机构
[1] Agr Res Educ & Extens Org AREEO, Agr Biotechnol Res Inst Iran ABRII, Karaj, Iran
[2] Univ Pittsburgh, Drug Discovery Inst, Pittsburgh, PA 15261 USA
关键词
Au@Ag core-shell nanorods; nanoparticle synthesis; optical properties; tunability; ENHANCED RAMAN-SCATTERING; NANOPARTICLES SYNTHESIS; GOLD NANORODS;
D O I
10.1088/1361-6528/ad572b
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The synthesis of noble metal nanostructures with adjustable optical properties is essential due to their potential applications in various fields such as imaging, (bio) sensors, and catalysis. In this study, Au@Ag core-shell nanorods were synthesized with tunable optical properties. The synthesis process includes a two-stage approach: first, gold nanorods were synthesized through seed-mediated growth, and in the second stage, these gold nanorods were used as seeds to synthesize Au@Ag core-shell nanorods through the silver deposition process. Tunable core-shell nanorods were produced by changing the concentration of silver ions, reducing agent, stabilizing agent, seeds, and buffer as well as pH and the reaction time. Transmission electron microscopy images demonstrated the formation of the Au@Ag core-shell nanorod structure. In addition, UV-visible spectroscopy revealed the peak height and its shift towards shorter wavelengths, demonstrating the tunable optical properties of the synthesized nanorods. Overall, in this study, we demonstrated the synthesis of Au@Ag core-shell nanorods with adjustable plasmonic optical properties that could be changed by precisely controlling the thickness of the silver shell on the surface of the gold core.
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页数:9
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