Emission switching in carbon dots coated CdTe quantum dots driving by pH dependent hetero-interactions

被引：18

作者：

Dai, Xiao ^{[1
,2
]}

Wang, Hao ^{[1
,2
]}

Qian, Zhicheng ^{[3
]}

Yi, Qinghua ^{[1
,2
]}

Wang, Yun ^{[1
,2
]}

Cong, Shan ^{[1
,2
]}

Zhao, Jie ^{[1
,2
]}

Sun, Yinghui ^{[1
,2
]}

Huang, Jianwen ^{[4
]}

Xiong, Jie ^{[4
]}

Luo, Hongmei ^{[5
]}

Zou, Guifu ^{[1
,2
]}

机构：

[1] Soochow Univ, Coll Phys Optoelect & Energy, Suzhou 215006, Peoples R China

[2] Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China

[3] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Peoples R China

[4] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

[5] New Mexico State Univ, Dept Chem & Mat Engn, Las Cruces, NM 88003 USA

来源：

APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 20期

基金：

中国国家自然科学基金;

关键词：

ULTRAFAST CHARGE-TRANSFER; NANOPARTICLES; DYNAMICS; NITROGEN; BEHAVIOR;

D O I：

10.1063/1.4936174

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Due to the different emission mechanism between fluorescent carbon dots and semiconductor quantum dots (QDs), it is of interest to explore the potential emission in hetero-structured carbon dots/semiconducting QDs. Herein, we design carbon dots coated CdTe QDs (CDQDs) and investigate their inherent emission. We demonstrate switchable emission for the hetero-interactions of the CDQDs. Optical analyses indicate electron transfer between the carbon dots and the CdTe QDs. A heterojunction electron process is proposed as the driving mechanism based on N atom protonation of the carbon dots. This work advances our understanding of the interaction mechanism of the heterostructured CDQDs and benefits the future development of optoelectronic nanodevices with new functionalities. (c) 2015 AIP Publishing LLC.

引用

页数：4

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