Effect of aging on copper nanoparticles synthesized by pulsed laser ablation in water: structural and optical characterizations

被引：113

作者：

Swarnkar, R. K. ^{[1
]}

Singh, S. C. ^{[1
]}

Gopal, R. ^{[1
]}

机构：

[1] Univ Allahabad, Dept Phys, Laser Spect & Nanomat Lab, Allahabad 211002, Uttar Pradesh, India

来源：

BULLETIN OF MATERIALS SCIENCE | 2011年 / 34卷 / 07期

关键词：

Cu@Cu2O nanoparticles; laser ablation in aqueous medium; crystalline nanomaterials; optical characterization; nanostructured materials; CORE-SHELL NANOPARTICLES; OXIDE THIN-FILMS; RAMAN-SCATTERING; GLASS MATRIX; SIZE; NANOSTRUCTURES; PHOTOLUMINESCENCE; NANOCRYSTALS; FEMTOSECOND; DEPOSITION;

D O I：

10.1007/s12034-011-0329-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effect of aging on copper nanoparticles synthesized by pulsed laser ablation of copper plate in water was studied. By characterization studies of the aged nanoparticles, it is found that copper nanoparticles converted into Cu@Cu2O nanostructure. The synthesized nanomaterial is characterized with UV-Visible absorption, transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and Raman and photoluminescence (PL) spectroscopic techniques. TEM image shows that the aged nanoparticles get assembled into cactus like structure and are spherical in shape with average diameter 7 nm and dispersion 2 nm. XRD and FTIR spectrum confirm the formation of Cu@Cu2O in the aged sample. Raman spectrum also confirms the presence of Cu2O nanoparticles. PL spectrum of the aged nanoparticles shows a direct allowed transition with bandgap energy of 2.24 eV. The mechanism for synthesis of core-shell nanoparticles and formation of self-assembly of nanoparticles is also discussed.

引用

页码：1363 / 1369

页数：7

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