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

Date
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. The influential factors on the attachment process are the alkyl-amine chain length, concentration of amine, duration and temperature of the reaction. The nanorods are characterized by high resolution transition electron microscopy (HRTEM), 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.
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Description
peer-reviewed
Publisher
American Chemical Society
Citation
Journal of the American Chemical Society;131(34), pp. 12250-12257
Collections
Chemical Sciences
Bernal Institute
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Ryan_2009_spontaneous.pdf
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Keywords
nanorods, nanowires, x-ray diffraction
ULRR Identifiers
https://researchrepository.ul.ie/handle/10344/2983
 https://doi.org/10.34961/5321
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Funding Information
Science Foundation Ireland (SFI), Irish Research Council for Science, Engineering and Technology (IRCSET)
Sustainable Development Goals
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Type
Article
Rights
https://creativecommons.org/licenses/by-nc-sa/1.0/
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