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.
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页数：6
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