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Synthesis of Sn/Ag-Sn nanoparticles via room temperature galvanic reaction and diffusion

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Title: Synthesis of Sn/Ag-Sn nanoparticles via room temperature galvanic reaction and diffusion
Authors: Saw, Min Jia Browse this author
Mai Thanh Nguyen Browse this author →KAKEN DB
Zhu, Shilei Browse this author
Wang, Yongming Browse this author
Yonezawa, Tetsu Browse this author →KAKEN DB
Issue Date: 16-Jul-2019
Publisher: Royal Society of Chemistry
Journal Title: RSC advances
Volume: 9
Issue: 38
Start Page: 21786
End Page: 21792
Publisher DOI: 10.1039/c9ra02987g
Abstract: Tin (Sn) has a low melting temperature, i.e., 231.9 degrees C for the bulk, and the capability to form compounds with many metals. The galvanic reaction between Sn nanoparticles (NPs) as the core and silver nitrate at room temperature under argon gas in an organic solvent without any reducing power, was employed for the first time to coat an Ag-Sn intermetallic shell, i.e., Ag3Sn and/or Ag4Sn, on Sn NPs. For spherical Sn NPs, the NPs retained a spherical shape after coating. Uniform and Janus structures consisting of a beta-Sn core with Ag-Sn shell were observed in the resulting NPs and their population related to the input molar ratios of the metal precursors. The observation of the intermetallic shell is general for both spherical and rod-shape Sn NPs. The formation of the intermetallic shell indicated that two reactions occurred sequentially, first reduction of Ag ions to Ag atoms by the Sn core, followed by interdiffusion of Ag and Sn to form the Ag-Sn intermetallic shell.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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