Strong quantum confinement effect in nanocrystalline cerium oxide

被引：52

作者：

Arul, N. Sabari ^{[1
,2
]}

Mangalaraj, D. ^{[1
]}

Chen, Pao Chi ^{[2
]}

Ponpandian, N. ^{[1
]}

Viswanathan, C. ^{[1
]}

机构：

[1] Bharathiar Univ, Dept Nanosci & Technol, Coimbatore 641046, Tamil Nadu, India

[2] Lunghwa Univ Sci & Technol, Dept Chem & Mat Engn, Tao Yuan, Taiwan

来源：

MATERIALS LETTERS | 2011年 / 65卷 / 17-18期

关键词：

Nanoparticles; Cerium oxide; Structural; Precipitation; Quantum confinement; Optical absorption; ULTRAVIOLET-ABSORPTION; NANOPARTICLES; NANORODS; SIZE; NANOSTRUCTURES; CONVERSION; SHAPES;

D O I：

10.1016/j.matlet.2011.05.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Highly uniform and well-dispersed cerium oxide quantum dots were successfully synthesized by simple precipitation method by using cerium ammonium nitrate and ammonium hydroxide as precursor materials with suitable conditions. The X-ray diffraction pattern indicates the formation of cubic phase CeO(2). The average particle size of cerium oxide from high resolution transmission electron microscopy (HRTEM) was found to be 3 nm. The X-ray photoelectron (XPS) spectrum confirms the presence of Ce(3+) in CeO(2). Optical studies by UV-vis spectroscopy for the synthesized CeO(2) nanoparticles exhibit a blue shift (E(g) = 3.78 eV) with respect to the bulk material (E(g) = 3.15 eV) due to quantum confined exciton absorption. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：2635 / 2638

页数：4

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