Biogenic synthesis of Ag, Au and bimetallic Au/Ag alloy nanoparticles using aqueous extract of mahogany (Swietenia mahogani JACQ.) leaves
| Autor: | Saswati Basu, Nayan Roy, Samiran Mondal, Rajibul A. Laskar, Naznin Ara Begum, Debabrata Mandal, Ismail Sk |
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| Rok vydání: | 2011 |
| Předmět: |
Silver
Materials science Polymers Alloy Kinetics Metal Nanoparticles Nanoparticle Biocompatible Materials engineering.material Absorption Colloid and Surface Chemistry Microscopy Electron Transmission Botany Swietenia Alloys Nanotechnology Meliaceae Physical and Theoretical Chemistry Spectroscopy Bimetallic strip Aqueous solution biology Surfaces and Interfaces General Medicine Hydrogen-Ion Concentration biology.organism_classification Plant Leaves Metals engineering Gold Absorption (chemistry) Oxidation-Reduction Biotechnology Nuclear chemistry |
| Zdroj: | Colloids and Surfaces B: Biointerfaces. 82:497-504 |
| ISSN: | 0927-7765 |
| DOI: | 10.1016/j.colsurfb.2010.10.007 |
| Popis: | In this paper, we have demonstrated for the first time, the superb efficiency of aqueous extract of dried leaves of mahogany (Swietenia mahogani JACQ.) in the rapid synthesis of stable monometallic Au and Ag nanoparticles and also Au/Ag bimetallic alloy nanoparticles having spectacular morphologies. Our method was clean, nontoxic and environment friendly. When exposed to aqueous mahogany leaf extract, competitive reduction of Au(III) and Ag(I) ions present simultaneously in same solution leads to the production of bimetallic Au/Ag alloy nanoparticles. UV-visible spectroscopy was used to monitor the kinetics of nanoparticles formation. UV-visible spectroscopic data and TEM images revealed the formation of bimetallic Au/Ag alloy nanoparticles. Mahogany leaf extract contains various polyhydroxy limonoids which are responsible for the reduction of Au(III) and Ag(I) ions leading to the formation and stabilization of Au and Ag nanopaticles. |
| Databáze: | OpenAIRE |
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