title: Spontaneous room temperature elongation of CdS and Ag2S nanorods via oriented attachment.
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 process are 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.
authors: Materials and Surface Science Institute, and Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Ireland.
authors: Catriona
authors: C
authors: O'Sullivan
authors: Robert D
authors: RD
authors: Gunning
authors: Ambarish
authors: A
authors: Sanyal
authors: Christopher A
authors: CA
authors: Barrett
authors: Hugh
authors: H
authors: Geaney
authors: Fathima R
authors: FR
authors: Laffir
authors: Shafaat
authors: S
authors: Ahmed
authors: Kevin M
authors: KM
authors: Ryan