Mukherjee, Pratap ; Nandi, Arun K. (2010) Bimetallic Aucore - Agshell nanoparticles from interfacial redox process using poly(o-methoxyaniline) Journal of Colloid and Interface Science, 344 (1). pp. 30-36. ISSN 0021-9797
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.jcis.2009.12.020
Abstract
Stable Aucore-Agshell bimetallic nanoparticles are produced in organic medium through an interfacial redox method using the redox property of an organically soluble conducting polymer poly(o-methoxyaniline) (POMA). The transition of the emeraldine base (EB) form of POMA to its pernigraniline base (PB) form occurs during nanoparticle formation and also the nitrogen atoms of POMA (PB) stabilize the nanoparticles via coordination. TEM images indicate that the interfacial redox replacement reaction between Au (III) in aqueous medium and Ag (0) in organic medium produces bimetallic nanoparticles with Aucore-Agshell morphology. The formation of such type of core-shell morphology is due to the different standard reduction potentials of the metal ions. The core-shell thickness of the bimetallic nanoparticle can be regulated by changing the POMA (EB) concentration in the organic layer.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
Keywords: | Core-shell; Interface; Redox Process; Poly(o-methoxyaniline); XPS |
ID Code: | 85314 |
Deposited On: | 03 Mar 2012 14:58 |
Last Modified: | 03 Mar 2012 14:58 |
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