Spontaneous room temperature elongation of CdS and Ag2S nanorods via oriented attachment

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Title: Spontaneous room temperature elongation of CdS and Ag2S nanorods via oriented attachment
Authors: O'Sullivan, Catriona
Gunning, Robert Denis
Sanyal, Ambarish
Barrett, Christopher A.
Geaney, Hugh
Laffir, Fathima R.
Ahmed, Shafaat
Ryan, Kevin M.
Permanent link: http://hdl.handle.net/10197/2721
Date: 6-Aug-2009
Abstract: Spontaneous elongation from nanorod to nanowire in the presence of an amine is reported for nanocrystals of cadmium sulfide and silver sulfide (cation exchanged from CdS). Elongation occurs instantaneously where the final aspect ratio is a controllable multiple of the original nanorod length. Transmission electron microscopy (TEM) analysis reveals the influential factors on the attachment processare the concentration of amine, duration and temperature of the reaction. The elongated nanorods are further characterized by X-ray diffraction (XRD), photoluminescence (PL), ultraviolet-visible spectroscopy(UV-vis) and X-ray photoelectron spectroscopy (XPS). A mechanism of oriented attachment is evidenced by the doubling in length of asymmetrically gold tipped CdS nanorods with the corresponding absence of elongation in symmetrically tipped nanorods.
Funding Details: Science Foundation Ireland
Higher Education Authority
Irish Research Council for Science, Engineering and Technology
Type of material: Journal Article
Publisher: ACS Publications
Journal: Journal of the American Chemical Society
Volume: 131
Issue: 34
Start page: 12250
End page: 12257
Copyright (published version): 2009 American Chemical Society
Keywords: ElongationNanorodsSpontaneousCdS
Subject LCSH: Nanostructured materials
Cadmium sulfide
Silver sulfide
DOI: 10.1021/ja902860t
Other versions: http://pubs.acs.org/doi/abs/10.1021/ja902860t
Language: en
Status of Item: Peer reviewed
Appears in Collections:Solar Energy Conversion (SEC) Cluster Research Collection

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