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

Le The Tam, Nguyen Thi Ngoc Linh, Saonilan Thapphanya, Dinh Thi Truong Giang
Author affiliations


  • Le The Tam Vinh University, 182 Le Duan, Vinh City, Nghe An Province, Viet Nam
  • 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



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


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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How to Cite

T. Le, L. Nguyen, S. Thapphanya, and G. Dinh, “Study on fabrication and optical properties of monodisperse Ag-Au alloy nanostructure”, Vietnam J. Sci. Technol., vol. 62, no. 3, pp. 496–507, Jun. 2024.




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