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A Novel Fabrication of Poly(ethylenimine)-Capped Au Nanoparticle Films at Toluene-Water Interface

등록일
2008년 2월 11일 13시 08분 32초
접수번호
0284
발표코드
29P60포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 <발표Ⅰ>
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
이지원, 이향봉, 신권수1, 김관
서울대학교 화학부,
1숭실대학교 화학과,
Poly(ethylenimime)-capped Au nanoparticles are prepared at room temperature using PEI as the reductant of hydrogen tetrachloroaurate (HAuCl4). The size of Au nanoparticles is readily controlled by varying the relative amount of PEI used initially versus HAuCl4; as usual, increasing the molar ratio of PEI to gold leads to decreasing the particle size and the Au nanoparticles thus prepared are stable for several months without aggregation. The PEI-capped Au nanoparticles are further demonstrated to be assembled into 2-D aggregates at a toluene-water interface, specifically by the mediation of aromatic thiols added into the toluene phase: The optical property of the PEI-capped Au films is controlled by the amount of aromatic thiols added into the toluene phase. The PEI-capped Au films are robust, microscopically smooth, and highly SERS-active, and so are expected to be invaluable in the development of optical nanotechnology.

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