Microwave-assisted, surfactant-free synthesis of air-stable copper nanostructures and their SERS study

被引：57

作者：

Dar, M. Ibrahim ^{[1
,2
]}

Sampath, S. ^{[3
]}

Shivashankar, S. A. ^{[1
,2
]}

机构：

[1] Indian Inst Sci, Ctr Nano Sci & Engn, Bangalore 560012, Karnataka, India

[2] Indian Inst Sci, Mat Res Ctr, Bangalore 560012, Karnataka, India

[3] Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 42期

关键词：

ENHANCED RAMAN-SCATTERING; 4-MERCAPTOBENZOIC ACID; THIN-FILMS; NANOPARTICLES; SIZE; XPS; CU; ANTIFUNGAL; REDUCTION; OXIDATION;

D O I：

10.1039/c2jm35629e

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：

A simple, rapid, and surfactant-free synthesis of crystalline copper nanostructures has been carried out through microwave irradiation of a solution of copper acetylacetonate in benzyl alcohol. The structures are found to be stable against oxidation in ambient air for several months. High-resolution electron microscopy (SEM and TEM) reveals that the copper samples comprise nanospheres measuring about 150 nm in diameter, each made of copper nanocrystals similar to 7 nm in extension. The nanocrystals are densely packed into spherical aggregates, the driving force being minimization of surface area and surface energy, and are thus immune to oxidation in ambient air. Such aggregates can also be adherently supported on SiO2 and Al2O3 when these substrates are immersed in the irradiated solution. The air-stable copper nanostructures exhibit surface enhanced Raman scattering, as evidenced by the detection of 4-mercaptobenzoic acid at 10(-6) M concentrations.

引用

页码：22418 / 22423

页数：6

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