One-step synthesis of gold bimetallic nanoparticles with various metal-compositions
| Autor: | Maria Antoaneta Bratescu, Nagahiro Saito, Osamu Takai |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Mechanical Engineering Inorganic chemistry Metals and Alloys Energy-dispersive X-ray spectroscopy Nanoparticle Electrochemistry Metal Mechanics of Materials Transmission electron microscopy visual_art Materials Chemistry visual_art.visual_art_medium Surface plasmon resonance Bimetallic strip Plasmon |
| Zdroj: | Journal of Alloys and Compounds. 562:74-83 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2013.02.033 |
| Popis: | A rapid, one-step process for the synthesis of bimetallic nanoparticles by simultaneous metal reduction and gold erosion in an aqueous solution discharge was investigated. Gold bimetallic nanoparticles were obtained by alloying gold with various types of metals belonging to one of the following categories: divalent sp metals, trivalent sp metals, 3d or 4d metals. The composition of the various gold bimetallic nanoparticles obtained depends on electrochemical factors, charge transfer between gold and other metal, and initial concentration of metal in solution. Transmission electron microscopy and energy dispersive spectroscopy show that the gold bimetallic nanoparticles were of mixed pattern, with sizes of between 5 and 20 nm. A red-shift of the surface plasmon resonance band in the case of the bimetallic nanoparticles Au–Fe, Au–Ga, and Au–In, and a blue-shift of the plasmon band of the Au–Ag nanoparticles was observed. In addition, the interaction of gold bimetallic nanoparticles with unpaired electrons, provided by a stable free radical molecule, was highest for those NPs obtained by alloying gold with a 3d metal. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect