title: Colloidal 2D-0D Lateral Nanoheterostructures: A Case Study of Site-Selective Growth of CdS Nanodots onto Bi₂Se₃ Nanosheets.
abstract: Two-dimensional (2D) nanoheterostructure (2D NHS) with nanoparticles grown on 2D nanomaterial substrates could potentially enable many novel functionalities. Controlled site-selective growth of nanoparticles on either the lateral or the basal directions of 2D nanomaterial substrates is desirable but extremely challenging. Herein, we demonstrate the rational control of lateral- and basal-selective attachment of CdS nanoparticles onto 2D Bi2Se3 nanosheets through solution phase reactions. The combination of experimental and theoretical efforts elucidate that site-relevant interfacial bonding and kinetic control of molecular precursors play vital roles for site selectivity. Furthermore, the electronic structures revealed from density functional theory calculations explain the superior performance of the lateral 2D NHSs compared to their basal counterpart in prototype photoelectrochemical cells. The present study will inspire the construction of other site-selective 2D NHSs with well-defined structure and unique properties.
authors.affiliation: §Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50010, United States.
authors.forename: Biao
authors.initials: B
authors.lastname: Xu
authors.forename: Haoyi
authors.initials: H
authors.lastname: Li
authors.forename: Hao
authors.initials: H
authors.lastname: Yang
authors.forename: Wentian
authors.initials: W
authors.lastname: Xiang
authors.affiliation: ⊥State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Zhou
authors.affiliation: §Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50010, United States.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wu
authors.forename: Xun
authors.initials: X
authors.lastname: Wang
keywords: Nano; density functional theory; heterostructure; site-selective; two-dimensional