胶体硫化镉半导体幻数量子点F311的形成
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- 英文论文题名：Formation of CdS Magic-Size Nanocluster F311
- 论文作者：朱婷婷 ; 张保卫 ; 余睽
- 英文论文作者：Tingting Zhu ; Baowei Zhang ; Kui Yu ; Institute of Atomic and Molecular Physics ; Sichuan University
- 年：2016
- 作者机构：四川大学原子与分子物理研究所;
- 论文关键词：胶体半导体量子点 ; 形成机理
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十六分会：纳米材料合成与组装
- 语种：中文
- 分类号：O648.1;TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十六分会 ; 纳米材料合成与组装
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：217k
- 原文格式：D
- 会议级别：全国
摘要
胶体半导体幻数量子点纳米晶通常在常规量子点生成前期伴随出现。由于幻数量子点纳米晶和常规量子点通常共同存在,幻数量子点纳米晶在常规量子点的合成中的角色一直保持有不同的意见~[1-3]。一个幻数量子点纳米晶的制备是困难的,其形成机理是匮乏的。这里,我们设计了合成方法来控制硫化镉胶体半导体幻数量子点纳米晶的形成速率,并且没有常规量子点的出现~[4]。我们观测到一个单独的幻数量子点纳米晶的详细形成过程,从没有明显吸收峰的样品以连续红移的生长模式向窄的吸收峰发展,其形成速率对微量的添加剂很敏感。我们的洞察为幻数量子点纳米晶的生成机理提供了全新见解。幻数量子点纳米晶的形成经历了没有吸收峰的一步。
Magic size clusters(MSCs) sometimes appear together with regular quantum dots(RQDs) at their early stage. The relation between MSCs and RQDs has been remaining an opening question. It is challenging to synthesize one MSC ensemble without the presence of RQDs; furthermore, the formation mechanism of MSCs is lacking. Here, we report our synthetic approach to colloidal semiconductor Cd S MSC family F311 without the presence of RQDs. The formation process of CdS F311 was in situ monitored by absorption spectroscopy, from featureless absorption to sharp absorption peaking at 311 nm via a continuous redshift pattern with enhanced optical density. The redshift rate was sensitive to the presence of a small amount of additives. The present study brings insights into the formation of MSCs which could start with featureless absorption precursors.
Magic size clusters(MSCs) sometimes appear together with regular quantum dots(RQDs) at their early stage. The relation between MSCs and RQDs has been remaining an opening question. It is challenging to synthesize one MSC ensemble without the presence of RQDs; furthermore, the formation mechanism of MSCs is lacking. Here, we report our synthetic approach to colloidal semiconductor Cd S MSC family F311 without the presence of RQDs. The formation process of CdS F311 was in situ monitored by absorption spectroscopy, from featureless absorption to sharp absorption peaking at 311 nm via a continuous redshift pattern with enhanced optical density. The redshift rate was sensitive to the presence of a small amount of additives. The present study brings insights into the formation of MSCs which could start with featureless absorption precursors.
引文
[1]Daocheng Pan;Xiangling Ji;Lijia An;Yunfeng Lu.Chem.Mater.2008,20,3560-3566.
[2]Cossairt,Brandi M.et al Chem.Mater.2015,27,1432-1441.
[3]Zhong Jie,Jiang;Kelley,David F.ACS Nano 2010,4,1561.
[4]Tingting Zhu;Baowei Zhang;Kui Yu;et al manuscript In preparation.
[2]Cossairt,Brandi M.et al Chem.Mater.2015,27,1432-1441.
[3]Zhong Jie,Jiang;Kelley,David F.ACS Nano 2010,4,1561.
[4]Tingting Zhu;Baowei Zhang;Kui Yu;et al manuscript In preparation.