Synthesis of Small Atomic Copper Clusters in Microemulsions

被引：156

作者：

Vazquez-Vazquez, Carlos ^{[1
]}

Banobre-Lopez, Manuel ^{[1
]}

Mitra, Atanu ^{[1
]}

Arturo Lopez-Quintela, M. ^{[1
]}

Rivas, Jose ^{[2
]}

机构：

[1] Fac Quim, Dept Quim Fis, Santiago De Compostela 15782, Spain

[2] Fac Fis, Dept Fis Aplicada, Santiago De Compostela 15782, Spain

来源：

LANGMUIR | 2009年 / 25卷 / 14期

关键词：

PROTECTED GOLD CLUSTERS; OPTICAL-PROPERTIES; REVERSE MICELLES; METHANOL SYNTHESIS; AU-25; CLUSTERS; IN-SITU; NANOPARTICLES; SIZE; STABILITY; METAL;

D O I：

10.1021/la900100w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report evidence of the formation of small atomic copper clusters, Cu-n, by the microemulsion technique, and how their size can be controlled by adjusting the percentage of the reducing agent used. Copper clusters were characterized by UV-visible spectrophotometry and atomic force microscopy. Photoluminescent copper clusters, Cu-n, with n <= 13, can be obtained using very low percentages of the reducing agent (< 10% of the stochiometric amount). Photoluminescent clusters disappear for larger percentages of reducing agent, giving rise to larger copper clusters (0.8-2.0 nm), showing a red-shift of their UV-visible absorption bands as they grow in size. Finally, by using near stoichiometric amounts. nanoparticles of 2.9 +/- 1.1 nm in size, displaying the characteristic plasmon band, can be obtained.

引用

页码：8208 / 8216

页数：9

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