Metallopolymer precursors to L10-CoPt nanoparticles: Synthesis, characterization, nanopatterning and potential application

Qingchen Dong*, Wenshan Qu, Wenqing Liang, Kunpeng Guo, Haibin Xue, Yuanyuan Guo, Zhengong Meng, Cheuk Lam HO, Chi Wah Leung, Wai Yeung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)7068-7074
Number of pages7
JournalNanoscale
Volume8
Issue number13
DOIs
Publication statusPublished - 7 Apr 2016

Scopus Subject Areas

  • Materials Science(all)

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