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講者：黃維揚教授
演講題目：Functional Metallopolymers as Precursors to Magnetic Metal Nanoparticles: Synthesis, Lithographic Patterning and Applications
演講時間：11/12（三）15:00~17:00
演講地點：化工系223會議室
主持人：陳文章教授
Functional Metallopolymers as Precursors to Magnetic Metal Nanoparticles: Synthesis, Lithographic Patterning and Applications
Wai-Yeung Wong
Metal-containing polymers represent an important research field due to their combination of unique and intriguing redox, electronic, magnetic, optical, and catalytic properties and their ability to be easily processed and fabricated into thin films, fibers, and other forms. Modern technology depends on fast, reliable data processing and storage. Hard ferromagnetic (L10-phase) FePt alloy nanoparticles (NPs) with extremely high magnetocrystalline anisotropy are considered to be one of the most promising candidates for the next generation of ultrahigh-density data storage systems. The question of how to generate ordered patterns of L10-FePt NPs and how to transform the technology to the practical application is challenging. As these metallopolymers can be readily shaped and patterned using various lithographic techniques, they offer a convenient synthetic access to patterned arrays of metal NPs with control of their composition and density per unit area, which are crucial factors for many magnetic and electronic device applications. However, many of the most desirable properties are exhibited by metal alloy NPs rather than single-component metal NPs. In this talk, the recent advance in developing new functional metallopolymers (including bimetallic metallopolymers or blends of Fe and Pt homopolymers) as precursors to magnetic metal alloy nanoparticles and their lithographic patterning studies will be presented. These metallated polymers are promising as building blocks in high-density magnetic data storage media where the convenient and rapid patterning of magnetic NPs is highly desirable.
References:
1) K. Liu, C.-L. Ho, S. Aouba, Y.-Q. Zhao, Z.-H. Lu, S. Petrov, N. Coombs, P. Dube, H. E.Ruda, W.-Y. Wong and I. Manners, “Synthesis and Lithographic Patterning of FePt Nanoparticles using a Bimetallic Metallopolyyne Precursor”, Angew. Chem. Int. Ed., 2008, 47, 1255–1259.
2) Q. Dong, G. Li, C.-L. Ho, M. Faisal, C.-W. Leung, P. W.-T. Pong, K. Liu, B.-Z. Tang, I. Manners and W.-Y. Wong, “A Polyferroplatinyne Precursor for the Rapid Fabrication of L10-FePt-type Bit Patterned Media by Nanoimprint Lithography”, Adv. Mater., 2012, 24, 1034−1040.
3) C.-L. Ho, S.-Y. Poon, K. Liu, C.-K. Wong, G.-L. Lu, S. Petrov, I. Manners and W.-Y. Wong, “Synthesis, Photophysics and Pyrolytic Ceramization of a Platinum-containing Poly(germylacetylene) Polymer”, J. Organomet. Chem., 2013, 744, 165–171.
4) Q. Dong, G. Li, C.-L. Ho, C.-W. Leung, P. W.-T. Pong, I. Manners and W.-Y. Wong, “Facile Generation of L10-FePt Nanodot Arrays from a Nanopatterned Metallopolymer Blend of Iron and Platinum Homopolymers”, Adv. Funct. Mater., 2014, 24, 857–862.
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