화학공학소재연구정보센터
학회 한국공업화학회
학술대회 2005년 가을 (10/28 ~ 10/29, 건국대학교)
권호 9권 2호
발표분야 나노
제목 Size and shape control of CdS, CdSe, CdTe semiconductor nanocrystals
초록 The general mechanisms for the nucleation and growth of colloidal cadmium chalcogenides, CdE (E = S, Se, Te), quantum dots/rods are studied in order to control the size and shape of nanocrystals. Quantum-sized CdE nanocrystals were synthesized by the reaction of CdCl2 as a Cd-precursor and elemental S powder, TOPSe and TOPTe as a chalcogenide precursor respectively in an oleylamine solution. CdE quantum dots and rods with various sizes and aspect ratios were obtained under relatively low reaction temperature (120~160℃). As-prepared CdE nanocrystals obtained without further size-sorting process were nearly monodisperse and highly crystalline and were found to have quantum sized diameters below 10nm. The effect of process variables including monomer concentration, reaction time and initial precursor ratio on nucleation and growth of nanocrystals were examined. By controlling these factors, novel sized and shaped nanocrystals can be reproducibly obtained.
저자 이주현, 김대진, 구기갑
소속 서강대
키워드 Quantum dots; nanorods; nanocrystals
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