title: Metallopolymer precursors to L10-CoPt nanoparticles: synthesis, characterization, nanopatterning and potential application.
abstract: Ferromagnetic (L10 phase) CoPt alloy nanoparticles (NPs) with extremely high magnetocrystalline anisotropy are promising candidates for the next generation of ultrahigh-density data storage systems. It is a challenge to generate L10 CoPt NPs with high coercivity, controllable size, and a narrow size distribution. We report here the fabrication of L10 CoPt NPs by employing a heterobimetallic CoPt-containing polymer as a single-source precursor. The average size of the resulting L10 CoPt NPs is 3.4 nm with a reasonably narrow size standard deviation of 0.58 nm. The coercivity of L10 CoPt NPs is 0.54 T which is suitable for practical application. We also fabricated the L10 CoPt NP-based nanoline and nanodot arrays through nanoimprinting the polymer blend of CoPt-containing metallopolymer and polystyrene followed by pyrolysis. The successful transfer of the pre-defined patterns of the stamps onto the surface of the polymer blend implies that this material holds great application potential as a data storage medium.
authors.affiliation: MOE Key Laboratory for Interface Science and Engineering in Advanced Materials and Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan 030024, P.R. China. dongqingchen@tyut.edu.cn.
authors.forename: Qingchen
authors.initials: Q
authors.lastname: Dong
authors.affiliation: Institute of Carbon Materials Science, Shanxi Datong University, Datong 037009, P. R. China.
authors.forename: Wenshan
authors.initials: W
authors.lastname: Qu
authors.affiliation: MOE Key Laboratory for Interface Science and Engineering in Advanced Materials and Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan 030024, P.R. China. dongqingchen@tyut.edu.cn.
authors.forename: Wenqing
authors.initials: W
authors.lastname: Liang
authors.affiliation: MOE Key Laboratory for Interface Science and Engineering in Advanced Materials and Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan 030024, P.R. China. dongqingchen@tyut.edu.cn.
authors.forename: Kunpeng
authors.initials: K
authors.lastname: Guo
authors.affiliation: College of Physics and Optoelectronics, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan 030024, P.R. China.
authors.forename: Haibin
authors.initials: H
authors.lastname: Xue
authors.affiliation: College of Physics and Optoelectronics, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan 030024, P.R. China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Institute of Molecular Functional Materials and Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, P.R. China and HKBU Institute of Research and Continuing Education, Shenzhen Virtual University Park, Shenzhen, 518057, P. R. China. rwywong@hkbu.edu.hk.
authors.forename: Zhengong
authors.initials: Z
authors.lastname: Meng
authors.affiliation: Institute of Molecular Functional Materials and Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, P.R. China and HKBU Institute of Research and Continuing Education, Shenzhen Virtual University Park, Shenzhen, 518057, P. R. China. rwywong@hkbu.edu.hk.
authors.forename: Cheuk-Lam
authors.initials: CL
authors.lastname: Ho
authors.affiliation: Department of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China. dennis.leung@polyu.edu.hk.
authors.forename: Chi-Wah
authors.initials: CW
authors.lastname: Leung
authors.affiliation: MOE Key Laboratory for Interface Science and Engineering in Advanced Materials and Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan 030024, P.R. China. dongqingchen@tyut.edu.cn and Institute of Molecular Functional Materials and Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, P.R. China and HKBU Institute of Research and Continuing Education, Shenzhen Virtual University Park, Shenzhen, 518057, P. R. China. rwywong@hkbu.edu.hk.
authors.forename: Wai-Yeung
authors.initials: WY
authors.lastname: Wong