原子与分子物理学报
原子與分子物理學報
원자여분자물이학보
CHINESE JOURNAL OF ATOMIC AND MOLECULAR PHYSICS
2007年
2期
379-383
,共5页
CdS纳米颗粒%形状%温度%光致发光
CdS納米顆粒%形狀%溫度%光緻髮光
CdS납미과립%형상%온도%광치발광
Nanocrystals%CdS%shape%temperature%photoluminescence
采用反胶束法,在常温和低温下(接近零度)合成了硅土包裹的CdS纳米颗粒.高分辨电镜表明常温下合成的颗粒呈现直径小于5 nm的球形,而在低温下出现了短棒形和长达微米量级的线形.通过对实验过程的分析表明:不仅合成CdS纳米颗粒溶液的浓度,而且温度对CdS纳米颗粒的形状产生了重要的影响.进一步研究了CdS纳米颗粒的光致发光特性.
採用反膠束法,在常溫和低溫下(接近零度)閤成瞭硅土包裹的CdS納米顆粒.高分辨電鏡錶明常溫下閤成的顆粒呈現直徑小于5 nm的毬形,而在低溫下齣現瞭短棒形和長達微米量級的線形.通過對實驗過程的分析錶明:不僅閤成CdS納米顆粒溶液的濃度,而且溫度對CdS納米顆粒的形狀產生瞭重要的影響.進一步研究瞭CdS納米顆粒的光緻髮光特性.
채용반효속법,재상온화저온하(접근령도)합성료규토포과적CdS납미과립.고분변전경표명상온하합성적과립정현직경소우5 nm적구형,이재저온하출현료단봉형화장체미미량급적선형.통과대실험과정적분석표명:불부합성CdS납미과립용액적농도,이차온도대CdS납미과립적형상산생료중요적영향.진일보연구료CdS납미과립적광치발광특성.
Silica-overcoated CdS nanocrystals were synthesized by a reverse-micelle method at different temperatures. HRTEM images show that CdS nanocrystals prepared at room temperation are sphere-shaped and below 5 nm in diameter,but the CdS nanocrystals prepared at zero become rod-shaped and wire-shaped with a length of several micra . Analysis of experiment process shows that not only the monomer concentration but the growth temperature plays a key role for determination of the shape of CdS nanocrystals. Furthermore, we study the properties of photoluminescence (PL) of CdS nanocrystals.
