Low-temperature synthesis of tetrapod CdSe/CdS quantum dots through a microfluidic reactor

被引：6

作者：

Xing, Weishuo ^{[1
]}

Zhang, Shuang ^{[1
]}

An, Ruoting ^{[1
]}

Bi, Wengang ^{[1
]}

Geng, Chong ^{[1
]}

Xu, Shu ^{[1
]}

机构：

[1] Hebei Univ Technol, Sch Elect & Informat Engn, Tianjin Key Lab Elect Mat & Devices, 5340 Xiping Rd, Tianjin 300401, Peoples R China

来源：

NANOSCALE | 2021年 / 13卷 / 46期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

CRYSTAL-STRUCTURE CONTROL; NANOCRYSTALS SYNTHESIS; GROWTH; SURFACE; MONODISPERSE; PERFORMANCE; NUCLEATION; OXIDE;

D O I：

10.1039/d1nr04070g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Tetrapod CdSe/CdS quantum dots (QDs) have attracted extensive research interest in light-emitting applications due to their anisotropic optical properties and large absorption cross-section. Traditional synthesis methods for tetrapod CdSe/CdS QDs usually employ fatty phosphonic acid ligands to induce the growth of wurtzite CdS arms on cubic CdSe QDs at high temperatures (350-380 degrees C). Here, a low temperature (120 degrees C) route was developed for the synthesis of tetrapod CdSe/CdS QDs using mixed amine ligands instead of phosphonic acid ligands. A study of the growth mechanism reveals that the amine ligands induce the orientation growth of cubic CdS arms on wurtzite CdSe QDs through a pyramid-shaped intermediate structure. The low reaction temperature facilitates the growth control of the tetrapod CdSe/CdS QDs through a microfluidic reactor. This study substantially simplifies the synthetic chemistry for the anisotropic growth of CdS on CdSe QDs, paving the way for green and economic production of tetrapod CdSe/CdS QDs towards efficient light-emitting applications.

引用

页码：19474 / 19483

页数：10

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