title: Size, shape-dependent growth of semiconductor heterostructures mediated by Ag2Se nanocrystals as seeds.
abstract: Size- and shape-controllable Ag2Se-ZnS nanorods (NRs) and nanowires (NWs) have been synthesized successfully by the solution-liquid-solid (SLS) method. By using Ag2Se nanocrystals (NCs) as seeds and catalyst, colloidal Ag2Se-ZnS NRs and NWs with controllable diameters and lengths in ranges of 5-12 nm and 15-600 nm were successfully synthesized by altering the experimental variables, such as diameter of Ag2Se NCs, amount of precursor, reaction time, and reaction temperature. The Ag2Se NCs not only played a key role in the control of the shape of ZnS NCs but also influenced the crystal structure of ZnS NCs. The related surface photovoltage of heterostructured Ag2Se-ZnS NWs have also been studied and the formation of Ag2Se-ZnS heterostructure was confirmed. Moreover, this SLS method was successfully exploited to synthesize Ag2S-ZnS heterostructures.
authors.affiliation: Key Laboratory for Special Functional Materials, Henan University, Kaifeng 475004, P. R. China.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Xu
authors.forename: Jinzhong
authors.initials: J
authors.lastname: Niu
authors.forename: Hongzhe
authors.initials: H
authors.lastname: Wang
authors.forename: Huaibin
authors.initials: H
authors.lastname: Shen
authors.forename: Lin Song
authors.initials: LS
authors.lastname: Li