title: Laser-Irradiation-Induced Melting and Reduction Reaction for the Formation of Pt-Based Bimetallic Alloy Particles in Liquids.
abstract: Laser melting in liquids (LML) is one of the most effective methods to prepare bimetallic alloys; however, despite being an ongoing focus of research, the process involved in the formation of such species remains ambiguous. In this paper, we prepared two types of Pt-based bimetallic alloys by LML, including Pt-Au alloys and Pt-iron group metal (iM=Fe/Co/Ni) alloys, and investigated the corresponding mechanisms of alloying process. Detailed component and structural characterizations indicate that laser irradiation induced a quite rapid formation process (not exceeding 10 s) of Pt-Au alloy nanospheres, and the crystalline structures of Pt-Au alloys is determined by the monometallic constituents with higher content. For Pt-iM alloys, we provide direct evidence to support the conclusion that FeOx/CoOx/NiOxcolloids can be reduced to elementary Fe/Co/Ni particles by ethanol molecules during laser irradiation, which then react with Pt colloids to form Pt-iM sub-microspheres. These results demonstrate that LML provides an optional route to prepare Pt-based bimetallic alloy particles with tunable size, components, and crystalline phase, which should have promising applications in biological and catalysis studies.
authors.affiliation: Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Shushanhu Road 350, Hefei, 230031, China.|Department of Materials Science and Engineering, University of Science and Technology of China, Jinzhai Road 96, Hefei, 230026, China.
authors.forename: Yechuang
authors.initials: Y
authors.lastname: Han
authors.affiliation: Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Shushanhu Road 350, Hefei, 230031, China.
authors.forename: Shouliang
authors.initials: S
authors.lastname: Wu
authors.affiliation: Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Shushanhu Road 350, Hefei, 230031, China.
authors.forename: Enmei
authors.initials: E
authors.lastname: Dai
authors.affiliation: Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Shushanhu Road 350, Hefei, 230031, China.
authors.forename: Yixing
authors.initials: Y
authors.lastname: Ye
authors.affiliation: Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Shushanhu Road 350, Hefei, 230031, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.affiliation: Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Shushanhu Road 350, Hefei, 230031, China.
authors.forename: Zhenfei
authors.initials: Z
authors.lastname: Tian
authors.affiliation: Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Shushanhu Road 350, Hefei, 230031, China.
authors.forename: Yunyu
authors.initials: Y
authors.lastname: Cai
authors.affiliation: Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Shushanhu Road 350, Hefei, 230031, China.
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Shushanhu Road 350, Hefei, 230031, China.|Department of Materials Science and Engineering, University of Science and Technology of China, Jinzhai Road 96, Hefei, 230026, China.
authors.forename: Changhao
authors.initials: C
authors.lastname: Liang
keywords: alloys; colloids; high-temperature chemistry; laser chemistry; nanoparticles