Additional active Raman modes in α-PbO nanoplates

被引：31

作者：

Cortez-Valadez, M. ^{[1
]}

Vargas-Ortiz, A. ^{[1
]}

Rojas-Blanco, L. ^{[1
]}

Arizpe-Chavez, H. ^{[2
]}

Flores-Acosta, M. ^{[2
]}

Ramirez-Bon, R. ^{[1
]}

机构：

[1] IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 76001, Qro, Mexico

[2] Univ Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, Mexico

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2013年 / 53卷

关键词：

PbO nanoplate; Phase transition; Raman spectroscopy by DFT; High energy ball milling; LEAD;

D O I：

10.1016/j.physe.2013.05.006

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work we report the structural and morphological properties of alpha-PbO nanoplates obtained by high energy ball milling from commercial PbO powder. The high energy ball milling process induces a PbO crystalline phase transfomation from initial massicot (beta-PbO) to litharge (alpha-PbO) after 5 h. The PbO nanoplates have litharge crystalline phase and thickness between 20-30 nm. The Raman spectrum of the alpha-PbO nanoplates displays the bands related to bulk PbO and two additional bands at frequencies 464 and 530 cm(-1), which were associated to size effects in the nanoplates. Density functional theory calculations of the vibration properties of small alpha-PbO clusters predicted vibration modes at frequencies which agree with the experimental results. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：146 / 149

页数：4

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