کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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597429 | 1454069 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Preparation of silver, gold and silver–gold bimetallic nanoparticles in w/o microemulsion containing TritonX-100 Preparation of silver, gold and silver–gold bimetallic nanoparticles in w/o microemulsion containing TritonX-100](/preview/png/597429.png)
Silver, gold and silver–gold alloy nanoparticles were prepared in w/o microemulsion containing TritonX-100 and cyclohexane. Silver nitrate and tetrachloroauric(III) acid (HAuCl4) were taken as the metal precursors and sodium borohydride (NaBH4) was used as a reducing agent. The formation of Ag and Au nanoparticles was confirmed from the appearance of surface plasmon absorption maxima at 404 ± 2 and 525 ± 2 nm for Ag and Au nanoparticles, respectively. For bimetallic nanoparticles absorption peak was observed between the two maximas of corresponding metallic particles. The surface plasmon absorption maxima for bimetallic nanoparticles changes linearly with increasing Au mole ratio content in various alloy compositions. The transmission electron microscopy (TEM) showed formation of particles of 5–50 nm diameter. Dynamic light scattering (DLS) data gave narrow particle size distribution.
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 302, Issues 1–3, 20 July 2007, Pages 483–487