title: Si-CdSSe core/shell nanowires with continuously tunable light emission.
abstract: Uniform Si-CdSSe core/shell nanowires were controllably synthesized by a multisource thermal evaporation route. Both the silicon core and the alloyed CdSSe shell are of high-quality and single crystalline. The silicon core is grown via the gold-catalyzed VLS route with a silicon wafer piece at the high temperature zone as the source. These preferentially grown Si nanowires further serve as templates for the afterward depositions of CdSSe shells using CdS/CdSe powders at the low temperature zone of the furnace as sources. The composition/band gap of the shells can be continuously modulated by the S/Se ratio of the evaporation sources, making these prepared heterostructures have strong and spectral position/color largely tunable light emission at the visible region. These kind of structures may have potential applications in multicolor nanoscaled light-emitting devices. This flexible growth route will also be applicable for controllable synthesis of other Si wire containing heterostructures.
authors.affiliation: MPI of Microstructure Physics, Weinberg 2, Halle 06120, Germany. pananlian@hotmail.com
authors.forename: An Lian
authors.initials: AL
authors.lastname: Pan
authors.forename: Lide
authors.initials: L
authors.lastname: Yao
authors.forename: Yong
authors.initials: Y
authors.lastname: Qin
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Dong Sik
authors.initials: DS
authors.lastname: Kim
authors.forename: Richeng
authors.initials: R
authors.lastname: Yu
authors.forename: Bingsuo
authors.initials: B
authors.lastname: Zou
authors.forename: Peter
authors.initials: P
authors.lastname: Werner
authors.forename: Margit
authors.initials: M
authors.lastname: Zacharias
authors.forename: Ulrich
authors.initials: U
authors.lastname: Gösele