title: Linearly arranged polytypic CZTSSe nanocrystals.
abstract: Even colloidal polytypic nanostructures show promising future in band-gap tuning and alignment, researches on them have been much less reported than the standard nano-heterostructures because of the difficulties involved in synthesis. Up to now, controlled synthesis of colloidal polytypic nanocrsytals has been only realized in II-VI tetrapod and octopod nanocrystals with branched configurations. Herein, we report a colloidal approach for synthesizing non-branched but linearly arranged polytypic I(2)-II-IV-VI(4) nanocrystals, with a focus on polytypic non-stoichiometric Cu(2)ZnSnS(x)Se(4-x) nanocrystals. Each synthesized polytypic non-stoichiometric Cu(2)ZnSnS(x)Se(4-x) nanocrystal is consisted of two zinc blende-derived ends and one wurtzite-derived center part. The formation mechanism has been studied and the phase composition can be tuned through adjusting the reaction temperature, which brings a new band-gap tuning approach to Cu(2)ZnSnS(x)Se(4-x) nanocrystals.
authors.affiliation: Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, CAS Key Laboratory of Mechanical Behavior and Design of Materials, the National Synchrotron Radiation Laboratory, University of Science and Technology of China , Hefei 230026, PR China.
authors.forename: Feng-Jia
authors.initials: FJ
authors.lastname: Fan
authors.forename: Liang
authors.initials: L
authors.lastname: Wu
authors.forename: Ming
authors.initials: M
authors.lastname: Gong
authors.forename: Shi You
authors.initials: SY
authors.lastname: Chen
authors.forename: Guang Yao
authors.initials: GY
authors.lastname: Liu
authors.forename: Hong-Bin
authors.initials: HB
authors.lastname: Yao
authors.forename: Hai-Wei
authors.initials: HW
authors.lastname: Liang
authors.forename: Yi-Xiu
authors.initials: YX
authors.lastname: Wang
authors.forename: Shu-Hong
authors.initials: SH
authors.lastname: Yu