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  • 09월 04일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis of Metal-Semiconductor Double Shell Hollow Nanocubes via Sequential Nanoscale Reactions

등록일
2014년 9월 2일 17시 16분 55초
접수번호
1423
발표코드
INOR.P-259 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
무기화학
저자 및
공동저자
최웅, 송현준*
한국과학기술원(KAIST) 화학과, Korea

Hybrid nanostructures comprising noble metals and semiconductors have become significant for various applications such as photocatalysts. In this study, we demonstrate a general synthetic protocol of double shell hollow nanostructures, where the hollow cubes contain double shells with metal and semiconductor layers separately. The double hollow shells were synthesized through three steps from Ag nanocubes. For the first step, hollow structures were synthesized via a partial galvanic replacement reaction by noble metals, including Pt, Au, and Pd. Outer shells were formed by chalcogenization of Ag components to Ag2X (X = S, Se) via the kirkendall effect. Cationic exchange of Ag cations with Cd2+ generated hybrid structures of metals and CdX. TEM images with elemental mapping show a clear separation between metal inner shells and semiconductor outer shells in the hollow cubes. The thickness of each shell can be controlled by tuning a degree of the Galvanic replacement reaction.


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