Study on fabrication and optical  properties  of monodisperse Ag-Au alloy nanostructure

Tam Le; Linh Nguyen; Saonilan Thapphanya; Giang Dinh

doi:10.15625/2525-2518/20092

Author affiliations

Authors

Le The Tam Vinh University, 182 Le Duan, Vinh City, Nghe An Province, Viet Nam https://orcid.org/0000-0002-1723-0238
Nguyen Thi Ngoc Linh Thai Nguyen University of Sciences, Tan Thinh Ward, Thai Nguyen City, Thai Nguyen Province, Viet Nam
Saonilan Thapphanya Thai Nguyen University of Sciences, Tan Thinh Ward, Thai Nguyen City, Thai Nguyen Province, Vietnam; Pharmaceutical Factory No 2, Vientiane, Laos
Dinh Thi Truong Giang Vinh University, 182 Le Duan, Vinh City, Nghe An Province, Viet Nam https://orcid.org/0009-0002-3574-1207

DOI:

https://doi.org/10.15625/2525-2518/20092

Keywords:

Nanostructure, Ag-A alloy, reduction in organic solvents, monodisperse, optical properties

Abstract

This study addresses challenges in various fields by creating a new method for uniform, size- and composition-controlled Ag-Au alloy nanoparticles in organic solvents. Building on prior research, we demonstrate control over nanoparticle properties by varying complexing agents, surfactants, and reducing agents. Optimal conditions using surfactant SOA and reducing agent TBAB yielded small, monodisperse Ag nanoparticles ideal for alloying with Au. The reaction time significantly impacts final morphology and surface plasmon resonance (SPR) properties of the resultant Ag-Au alloy nanoparticles. Interestingly, Au nanoparticles formed under identical conditions shared a similar size with 60-minute Ag-Au alloys, evidenced by a single SPR peak at 520 nm. This control over Ag-Au nanoalloy composition and size opens doors for promising applications.

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