Record Details

Local Conditions Influencing In Situ Formation of Different Shaped Silver Nanostructures and Subsequent Reorganizations in Ionomer Membrane

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Local Conditions Influencing In Situ Formation of Different Shaped Silver Nanostructures and Subsequent Reorganizations in Ionomer Membrane
 
Creator PATRA, S
SEN, D
PANDEY, AK
AGARWAL, C
RAMAGIRI, SV
BELLARE, JR
MAZUMDER, S
GOSWAMI, A
 
Subject ANGLE X-RAY
POLY(PERFLUOROSULFONIC) ACID MEMBRANE
ION-EXCHANGE MEMBRANE
POLYMER NANOCOMPOSITES
NAFION-117 MEMBRANE
COLLOIDAL DROPLETS
GOLD NANOPARTICLES
MODIFIED ELECTRODE
SCATTERING DATA
SELF-DIFFUSION
 
Description Ionomer membranes are promising platforms for the metal nanostructures and provide possibilities for utilizing unique properties of the nanostructures. However, it is not known how local environment prevailing in the membrane matrix plays a role in the process of formation of different dimensional metal nanostructures, and the subsequent fate of the mesoscopic physical architecture of the matrix. Therefore, different dimensional silver nanostructures were formed in the Nafion-117 membrane by manipulating local environment using carefully selected reductants, varying temperature, and controlled loading of Ag+ ions in the matrix by ion-exchange process. Ag nanostructures thus formed had different sizes and shapes, spherical nanoparticles, nanorods, and nanosponge depending upon in situ reduction and growth conditions. These nanocomposites were studied by combination of transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS) for understanding the formation and subsequent modifications in the shape of the metal nanostructure as well as in the self-assembling morphology of the matrix in different post reduction counterionic environment. Under specific conditions, silver nanorods having similar to 8 nm mean diameter and similar to 40 nm length were formed. The embedded Ag nanostructures of different sizes and shapes were found to affect the self-diffusion mobility of Na+ and Cs+ counterions in the nanocomposite matrixes differently due to variation in reorganizations of the ionomer matrix.
 
Publisher AMER CHEMICAL SOC
 
Date 2014-10-15T13:10:11Z
2014-10-15T13:10:11Z
2013
 
Type Article
 
Identifier JOURNAL OF PHYSICAL CHEMISTRY C, 117(23)12026-12037
http://dx.doi.org/10.1021/jp402155m
http://dspace.library.iitb.ac.in/jspui/handle/100/14969
 
Language en