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Silver Nanodisk: Synthesis, Characterization and Self-Assembly

Published online by Cambridge University Press:  11 February 2011

Sihai Chen ,
Zhiyong Fan  and
David L. Carroll
Sihai Chen
Affiliation:
Laboratory for Nanotechnology, School of Materials Science and Engineering, Clemson University, Clemson, SC 29634, U.S.A. Email: chens@clemson.edu
Zhiyong Fan
Affiliation:
Laboratory for Nanotechnology, School of Materials Science and Engineering, Clemson University, Clemson, SC 29634, U.S.A. Email: chens@clemson.edu
David L. Carroll
Affiliation:
Laboratory for Nanotechnology, School of Materials Science and Engineering, Clemson University, Clemson, SC 29634, U.S.A. Email: chens@clemson.edu
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Abstract

A new form of silver nanostructured materials, a silver nanodisk, is generated by a solution-phase approach. In this method, two main steps are applied: the first is the generation of the truncated triangular silver nanoplates, which are obtained by seed-mediated growth of silver particles using cetyltrimethylammonium bromide (CTAB) as the soft templates. The second is the mild aging of the above triangular silver nanoplate solution at 40 °C to get the desired silver nanodisks. Transmission electron microscopy and atomic force microscopy studies show that the nanodisk has a thickness of the order of 20 – 30 nm, and a diameter around 60 nm. X-ray and electron diffraction analysis reveal that the nanodisk is single crystal and with its basal plane as (111) lattice plane. These nanodisks display a strong surface plasmon absorption band at 475 nm; this band can be continuously tuned within 420 nm to 560 nm through adjusting the aging time. The formation of self-assembled monolayer of CTAB on the basal plane is suggested to account for both the anisotropic growth from triangular nanoplates to nanodisks, and the formation of large-scale necklace-like structures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 740: Symposium I – Nanomaterials for Structural Applications , 2002 , I10.11
Copyright
Copyright © Materials Research Society 2003

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