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  • 02월 26일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제115회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthetic Approach to Controlled Assembly of Nanoparticles: Raspberry-like Metamolecules

2015년 2월 26일 11시 49분 42초
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목 14시 : 00분
재료화학 - Synthesis and Application of Exotic Nanoparticles
저자 및
박소정*, Zhaoxia QIan1, Zahra Fahkraai2, Chen Li1, Nader Engheta3, 서명주
이화여자대학교 화학나노과학과, Korea
1University of Pennsylvania, USA, China
2University of Pennsylvania, USA, Iran
3University of Pennsylvania, USA, United States
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승인 4건
Here, we present a new synthetic approach to produce raspberry-like plasmonic nanostructures with unusually strong magnetic resonances. The synthesis is based on the surfactant-assisted templated seed-growth method, which allows for the simultaneous one-step synthesis and assembly of well-insulated gold nanoparticles. The aromatic surfactant used for the syntheses protected nanoparticles from touching each other and made it possible to place discrete nanoparticles at close distances, which are key requirements for the fabrication of metamolecules supporting magnetic resonances at optical frequencies. The resulting isotropic gold nanoparticle clusters, which are termed raspberry-like metamolecules (raspberry-MMs), exhibited unusually broadband surface plasmon resonance in the visible and near-IR region. A series of syntheses with varying structure parameters, along with finite-difference time-domain modeling and mode analyses of corresponding model structures showed that the close-packing of a large number of metal nanoparticles in raspberry-MMs is responsible for the unusually strong magnetic resonances and broad extinction spectra observed here.