Copper nanoparticles grown under hydrogen: Study of the surface oxide

被引：70

作者：

Diaz-Droguett, D. E. ^{[1
]}

Espinoza, R. ^{[2
]}

Fuenzalida, V. M. ^{[1
]}

机构：

[1] Univ Chile, Fac Ciencias Fis & Matemat, Dept Fis, Santiago, Chile

[2] Univ Chile, Dept Ciencias Mat, Fac Ciencias Fis & Matemat, Santiago, Chile

来源：

APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 10期

关键词：

Copper nanoparticles; Hydrogen; Oxide; Surface; Gas condensation; GAS CONDENSATION; PARTICLE-SIZE; CARRIER GAS; ONE-STEP; CUO; CU2O; NANOSTRUCTURES; IRRADIATION; REDUCTION; LIQUID;

D O I：

10.1016/j.apsusc.2010.12.082

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Copper nanoparticles with sizes between 10nm and 50nm were grown by condensation in hydrogen at pressures from 10 Pa to 1200 Pa. The crystallite size ranged from 10nm to 25nm using the Scherrer method. X-ray diffraction showed the reflections of metallic copper occasionally mixed with an oxidized phase (CuO or Cu(2)O). As shown by TEM examination, the smaller particles that did not exceed 25nm exhibited faceted morphologies whereas the bigger ones had ovaled-spherical forms sometimes containing twins. X-ray photoelectron spectroscopy revealed that the nanoparticles consist of a copper core, completely surrounded by a Cu(2)O shell, which is oxidized to CuO at the surface layer. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：4597 / 4602

页数：6

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