Spectroscopic and electrochemical monitoring of band structure changes during the alloying of CdTe QDs by Hg2+ ions

被引：3

作者：

Tynkevych, Olena O. ^{[1
]}

Ranoszek-Soliwoda, Katarzyna ^{[2
]}

Grobelny, Jaroslaw ^{[2
]}

Selyshchev, Oleksandr V. ^{[3
]}

Khalavka, Yuriy B. ^{[1
]}

机构：

[1] Yuriy Fedkovych Chernivtsi Natl Univ, Dept Solid State Inorgan Chem & Nanomat, Kotsiubynsky Str 2, UA-58012 Chernovtsy, Ukraine

[2] Univ Lodz, Dept Mat Technol & Chem, 163 Pomorska Str, PL-90236 Lodz, Poland

[3] Natl Acad Sci Ukraine, LV Pisarzhevskii Inst Phys Chem, Prospekt Nauki 31, UA-03028 Kiev, Ukraine

来源：

MATERIALS RESEARCH EXPRESS | 2016年 / 3卷 / 10期

关键词：

quantum dots; band structure; cadmium mercury telluride; QUANTUM DOTS; HIGH-QUALITY; CDHGTE NANOCRYSTALS;

D O I：

10.1088/2053-1591/3/10/105046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The series of ultrasmall thioglycolic acid-stabilized colloidal Cd1-xHgxTe QDs (with d approximate to 2.3 nm) with different% Hg2+ content were synthesized by an ion-exchange reaction in water solution. The resulting Cd1-xHgxTe QDs were characterized using UV-vis absorption and photoluminescent optical spectroscopic studies, cyclic voltammetry and scanning transmission electron microscopy. By comparison of the results from different methods we conclude that Hg-alloying occurs in three stages -with the formation of three different types of QDs structures, namely core/shellCdTe/Cd1-xHgxTe QDs, core/shell/shellCdTe/Cd1-xHgxTe/CdHg QDs and core/shellCd(1-x)Hg(x)Te/CdHg QDs.

引用

页数：6

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