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

제110회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis of Multiple Gold Nanoparticles- or Gold Nanoclusters-Doped Silica Nanoparticles

2012년 8월 23일 15시 59분 28초
IND.P-118 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 17일 (수요일) 16:00~19:00
저자 및
박준성, 장민훈, 유효종1
한림대학교 화학과, Korea
1한림대학교 자연과학대학 화학과, Korea
Multiple gold core@silica shell nanoparticles (Multi Au@SiO2 NPs) were successfully synthesized through a reverse (water-in-oil) microemulsion method. The microemulsion was prepared by mixing a surfactant (Brij35), co-surfactant, organic solvent, and water. Multiple gold nanoparticles with a maximum diameter of 2 nm were doped into a silica matrix during the growth process. Control of the diameters of the gold nanoparticles within the silica matrix was achieved by varying the amount of cationic gold precursors. The size of the Multi Au@SiO2 NPs was also controlled in the reverse microemulsion process employing Brij35 by varying the water to Brij35 ratio. This is a novel and simple synthetic approach for generating hybrid gold-silica nanomaterials by doping multiple gold nanoparticles into a silica matrix. We also present the incorporation of gold nanoclusters (Au NCs) into a porous silica matrix to generate fluorescent Au NC-doped silica nanoparticles. Stable and highly emissive Au NCs were successfully synthesized by means of stabilization with PIPES (PIPES-Au NCs, where PIPES = 1,4-piperazinediethanesulfonic acid) using a thermal synthetic strategy. By varying the amount of PIPES, two Au NCs with different emission maxima were obtained. Sequential doping of the PIPES-Au NCs with tetraethylorthosilicate (TEOS) and 3-(aminopropyl)triethoxysilane (APTS) furnished a double-layer silica matrix, which effectively protected the PIPES-Au NCs during repeated washing with aqueous solvent and the composite of which exhibited enhanced emission.