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以巯基丙酸为稳定剂的水溶性CdTe量子点的水热合成及表征
Hydrothermal Synthesis and Characterization of Mercaptopropionic Acid Modified Water-soluble CdTe Quantum Dots
- 发光学报 2012年33卷第12期 页码：1309-1314
- 作者机构：
中国科学院安徽光学精密机械研究所 环境光学与技术重点实验室,安徽 合肥,230031
- 作者简介：
- 基金信息：国家"863"计划(2009AA063005)();安徽省自然科学基金(11040606M26)();安徽省杰出青年科学基金(1108085J19)();安徽光学精密机
DOI：10.3788/fgxb20123312.1309
中图分类号： O613.5纸质出版日期：2012-12-10，
收稿日期：2012-8-25，
修回日期：2012-10-13，
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甘婷婷, 张玉钧, 肖雪, 殷高方, 段静波, 石朝毅. 以巯基丙酸为稳定剂的水溶性CdTe量子点的水热合成及表征[J]. 发光学报, 2012,33(12): 1309-1314
GAN Ting-ting, ZHANG Yu-jun, XIAO Xue, YIN Gao-fang, DUAN Jing-bo, SHI Chao-yi. Hydrothermal Synthesis and Characterization of Mercaptopropionic Acid Modified Water-soluble CdTe Quantum Dots[J]. Chinese Journal of Luminescence, 2012,33(12): 1309-1314
甘婷婷, 张玉钧, 肖雪, 殷高方, 段静波, 石朝毅. 以巯基丙酸为稳定剂的水溶性CdTe量子点的水热合成及表征[J]. 发光学报, 2012,33(12): 1309-1314 DOI： 10.3788/fgxb20123312.1309.
GAN Ting-ting, ZHANG Yu-jun, XIAO Xue, YIN Gao-fang, DUAN Jing-bo, SHI Chao-yi. Hydrothermal Synthesis and Characterization of Mercaptopropionic Acid Modified Water-soluble CdTe Quantum Dots[J]. Chinese Journal of Luminescence, 2012,33(12): 1309-1314 DOI： 10.3788/fgxb20123312.1309.
摘要
以巯基丙酸(MPA)为稳定剂
采用水热合成方法在160 ℃下合成水溶性CdTe量子点。研究了不同反应时间及反应前驱体溶液的不同pH值对合成的CdTe量子点光学性质的影响。结果表明:所制得的CdTe量子点的荧光发射波长在510~661 nm范围内连续可调
并且CdTe量子点的光学性质强烈地依赖于反应前驱体溶液的pH值
最佳pH值为9。透射电子显微镜和X射线衍射分析表明所制备的CdTe量子点的形状接近于球形
粒径分布较均匀。与回流方法制备的水溶性量子点相比
高温条件下的水热合成方法简单
反应时间短
CdTe量子点生长速度快
100 min就可生长到3.5 nm
并且所制得的CdTe量子点荧光强度高
稳定性好
荧光量子产率也较高
最高可达44.6%。
Abstract
Mercaptopropionic acid (MPA) modified high quality CdTe quantum dots (QDs) were prepared by hydrothermal synthesis method in a high temperature. The influences of different reaction time and different pH value of the reactive precursor solution on the optical properties of CdTe QDs were studied. The results indicate that the fluorescence emission wavelength of the as-prepared CdTe QDs can be adjusted continuously at a range of 510~661 nm
and the optical properties of CdTe QDs strongly depend on the pH value of the reactive precursor solution(the optimum pH value is 9). The samples were characterized by transmission electron microscopy and X-ray diffraction. The results show that the shape of the as-prepared CdTe QDs is closed to sphere
and the particle size distribution is uniform. Comparing with the reflux method for preparing water-soluble QDs
the hydrothermal synthesis method at a high temperature is relatively simple
and the reaction time is shorter
the growth of CdTe QDs is faster
the particle size can be grown to 3.5 nm within 100 min. The as-prepared CdTe QDs possess higher fluorescence intensity
good stability and higher fluorescence quantum yield (up to 44.6%).
关键词
CdTe巯基丙酸水热法荧光
Keywords
CdTemercaptopropionic acidhydrothermalfluorescence
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