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Hierarchical Transformation of Silver Morphologies on Clay Film from Spheres, Cubes, Rods to Lengthy Nano-Wires

Published online by Cambridge University Press:  30 July 2012

Kai-Ling Liang ,
Ya-Chi Wang  and
Jiang-Jen Lin
Kai-Ling Liang
Affiliation:
Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
Ya-Chi Wang
Affiliation:
Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
Jiang-Jen Lin*
Affiliation:
Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
*
*Email: jiangjenlin@gmail.com
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Abstract

Silver nanoparticles (AgNPs) in silicate clay matrix films were fabricated from solution casting method. The Ag/clay dispersion was first prepared from in situ reduction of silver nitrate in the presence of silicate clay platelets and ethanol as the reducing agent. The morphologies of AgNPs have changed in a hierarchical manner, from sphere to cube and then to rod and wire morphologies during the annealing at 200 °C. The originally homogeneous AgNPs distribution in the clay matrix underwent the transformation of AgNPs in moving to the film surface and coalescing to larger sizes. The hierarchical change continued to form other morphologies. We observed the self-assembled morphologies including spherical (diameter ∼ 50 nm), cubic (length ∼100 nm), rod-like (length ∼ 1.6 μm and width ∼300 nm) and then to lengthy wire Ag (length ∼10μm). The kinetic mobility of AgNPs to surface and the characterization of Ag composition were confirmed through energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD).

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1450: Symposium CC – Nanoscale Materials Modification by Photon, Ion, and Electron Beams , 2012 , mrss12-1450-cc03-12
Copyright
Copyright © Materials Research Society 2012

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References

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