Abstract
Au–Ag alloy nanoparticles (NPs) were prepared in Polyvinylpyrrolidone (C6H9NO)n (PVP) solution by laser irradiation method. Au and Ag NPs were separately prepared in PVP solution by laser ablation. The mixture of Au and Ag NP colloids was irradiated by the second harmonic (532 nm) of pulsed Nd:YAG laser with different laser fluencies and exposure times. The Plasmon resonance absorption spectrum, morphology and structure of Au–Ag alloy NPs were observed by a UV-2450 spectrometer (Shimadzu), a high resolution transmission electron microscope (TEM Tecnai G2 20 S-TWIN/FEI). The results show that the resulting Au–Ag alloy NPs are homogeneous alloyed particles and dispersed in PVP solution with average diameter of 4 nm without sintered structure. Au–Ag alloy NPs were produced by 532 nm laser with different Au/Ag molar ratio of the initial mixed solution to give the plasmon resonance absorption peak in the intermediate positions between about 420 and 520 nm.
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This research was supported by Vietnam National University, Hanoi (VNU-HN) in the project QGTD 13.03.
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Nguyen, T.B., Nguyen, T.D., Tran, T.D. et al. Laser-Induced Synthesis of Au–Ag Alloy Nanoparticles in Polyvinylpyrrolidone (C6H9NO)n Solution. J Clust Sci 26, 1787–1799 (2015). https://doi.org/10.1007/s10876-015-0877-7
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DOI: https://doi.org/10.1007/s10876-015-0877-7