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  • 09월 12일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제110회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Perfect Lattice-Engraftment of Au@Fe3O4 Core-Shell Nanowire Arrays for Magnetoplasmonics

2012년 9월 5일 01시 22분 35초
MAT.P-1377 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 17일 (수요일) 16:00~19:00
저자 및
김시인, 이효반, 김봉수
KAIST 화학과, Korea
The multicomponent nanosystem by the marriage of two or more different materials may improve the overall performance through the close interaction between different components, and generate novel synergetic properties that are unachievable in the individual components. Au and Fe3O4 are representative materials showing excellent plasmonic and magnetic property at room temperature, respectively. For this reason, many research groups are attracted to hybrid nanomaterials made of Au and Fe3O4, but most research is focused on magnetic core(Fe3O4)/plasmonic shell(Au) nanoparticles(NPs). We introduced iron chloride as a Fe precursor and fabricated epitaxial thin film on as-synthesized single-crystalline Au nanowires(NWs) by simple chemical vapor deposition(CVD) method. Epitaxial growth of NPs have been reported due to perfect lattice matching between two materials, but it is for the first report on the growth of core-shell NWs entirely covered with Fe3O4 layer. Fe3O4 thin film was formed by combining multi-seeds epitaxially-grown on the Au surface because of atomic-level flatness and defect-free crystallinity of Au NWs. We observed that Au@Fe3O4 NW arrays have ferrimagnetic properties at room temperature due to Fe3O4 material, and individual Au@Fe3O4 NW shows the negative MR property at 2 K. Such diverse properties demonstrate that the hybrid nanostructure of Au@Fe3O4 could be utilized for magnetoplasmonic application.