title: Controlled synthesis of tuned bandgap nanodimensional alloys of PbS(x)Se(1-x).
abstract: Truly alloyed PbS(x)Se(1-x) (x = 0-1) nanocrystals (∼5 nm in size) have been prepared, and their resulting optical properties are red-shifted systematically as the sulfur content of the materials increases. Their optical properties are discussed using a modified Vegard's approach and the bowing parameter for these nanoalloys is reported for the first time. The alloyed structure of the nanocrystals is supported by the energy-filtered transmission electron microscope images of the samples, which show a homogeneous distribution of sulfur and selenium within the nanocrystals. X-ray photoelectron spectroscopy studies on ligand-exchanged nanocrystals confirmed the expected stoichiometry and various oxidized species.
authors.affiliation: School of Chemistry and Materials Science Centre, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.
authors.forename: Javeed
authors.initials: J
authors.lastname: Akhtar
authors.forename: Mohammad
authors.initials: M
authors.lastname: Afzaal
authors.forename: Mateusz
authors.initials: M
authors.lastname: Banski
authors.forename: Artur
authors.initials: A
authors.lastname: Podhorodecki
authors.forename: Marcin
authors.initials: M
authors.lastname: Syperek
authors.forename: Jan
authors.initials: J
authors.lastname: Misiewicz
authors.forename: Ursel
authors.initials: U
authors.lastname: Bangert
authors.forename: Samantha J O
authors.initials: SJ
authors.lastname: Hardman
authors.forename: Darren M
authors.initials: DM
authors.lastname: Graham
authors.forename: Wendy R
authors.initials: WR
authors.lastname: Flavell
authors.forename: David J
authors.initials: DJ
authors.lastname: Binks
authors.forename: Sandra
authors.initials: S
authors.lastname: Gardonio
authors.forename: Paul
authors.initials: P
authors.lastname: O'Brien