Synthesis of CdS nanocrystals by electron beam irradiation of a Cd2+-mercaptopropionic acid aqueous solution

被引：7

作者：

Yoo, D. S. ^{[1
]}

Ha, S. Y. ^{[1
]}

Kim, I. G. ^{[1
]}

Choo, M. S. ^{[1
]}

Kim, G. W. ^{[1
]}

Lee, E. S. ^{[1
]}

Cho, S. J. ^{[2
]}

Lee, B. C. ^{[3
]}

机构：

[1] Changwon Natl Univ, Dept Phys, Chang Won 641773, South Korea

[2] Kyungsung Univ, Dept Phys, Pusan 608736, South Korea

[3] Korea Atom Energy Res Inst, Lab Quantum Opt, Taejon 306600, South Korea

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2011年 / 269卷 / 12期

关键词：

Electron beam irradiation; CdS nanoparticles; CdCl2; Mercaptopropionic acid; Physical properties; LIGHT-EMITTING-DIODES; NANOPARTICLES; PHOTOLUMINESCENCE; CADMIUM;

D O I：

10.1016/j.nimb.2011.03.015

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We investigated a simple route for synthesizing CdS nanocrystals (NCs) via irradiation of a CdCl2 + mercaptopropionic acid (MPA) aqueous solution with a 10-MeV electron beam without using any additional sulfur precursors or stabilizers. When the concentration of the MPA was fixed to 2.5 mM, the morphology and optical properties of the NCs were changed by varying the CdCl2 concentration. Based on transmission electron microscopy (TEM) imaging, a 0.4 mM concentration of CdCl2 (the-MPA rich case) created only spherical quantum dots (QDs) with an average diameter of 6.6 nm. When the concentration of CdCl2 was increased to 5 mM (the cadmium-rich case), nanorods with an average diameter of 5.3 nm and an average aspect ratio of 8.2 were formed along with QDs with diameter of 4.9 nm. The crystalline structures of the NCs were verified to be hexagonal. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1350 / 1354

页数：5

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