title: Selective Ionic Transport Pathways in Phosphorene.
abstract: Despite many theoretical predictions indicating exceptionally low energy barriers of ionic transport in phosphorene, the ionic transport pathways in this two-dimensional (2D) material has not been experimentally demonstrated. Here, using in situ aberration-corrected transmission electron microscopy (TEM) and density functional theory, we studied sodium ion transport in phosphorene. Our high-resolution TEM imaging complemented by electron energy loss spectroscopy demonstrates a precise description of anisotropic sodium ions migration along the [100] direction in phosphorene. This work also provides new insight into the effect of surface and the edge sites on the transport properties of phosphorene. According to our observation, the sodium ion transport is preferred in zigzag edge rather than the armchair edge. The use of this highly selective ionic transport property may endow phosphorene with new functionalities for novel chemical device applications.
authors.affiliation: Department of Mechanical and Industrial Engineering, University of Illinois at Chicago , Chicago, Illinois 60607, United States.
authors.forename: Anmin
authors.initials: A
authors.lastname: Nie
authors.affiliation: Department of Mechanical and Industrial Engineering, University of Illinois at Chicago , Chicago, Illinois 60607, United States.|Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University , 30 South Puzhu Road, Nanjing 211816, China.
authors.forename: Yingchun
authors.initials: Y
authors.lastname: Cheng
authors.affiliation: Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology , Clearwater Bay, Kowloon, Hong Kong SAR, P. R. China.
authors.forename: Shoucong
authors.initials: S
authors.lastname: Ning
authors.affiliation: Department of Civil and Materials Engineering, University of Illinois at Chicago , Chicago, Illinois 60607, United States.
authors.forename: Tara
authors.initials: T
authors.lastname: Foroozan
authors.affiliation: Department of Mechanical and Industrial Engineering, University of Illinois at Chicago , Chicago, Illinois 60607, United States.
authors.forename: Poya
authors.initials: P
authors.lastname: Yasaei
authors.affiliation: Department of Biological and Chemical Sciences, Illinois Institute of Technology , Chicago, Illinois 60616, United States.
authors.forename: Wen
authors.initials: W
authors.lastname: Li
authors.affiliation: Department of Mechanical and Industrial Engineering, University of Illinois at Chicago , Chicago, Illinois 60607, United States.
authors.forename: Boao
authors.initials: B
authors.lastname: Song
authors.affiliation: Department of Mechanical and Industrial Engineering, University of Illinois at Chicago , Chicago, Illinois 60607, United States.
authors.forename: Yifei
authors.initials: Y
authors.lastname: Yuan
authors.affiliation: Energy Systems Division, Argonne National Laboratory , Lemont, Illinois 60439, United States.
authors.forename: Lin
authors.initials: L
authors.lastname: Chen
authors.affiliation: Department of Mechanical and Industrial Engineering, University of Illinois at Chicago , Chicago, Illinois 60607, United States.
authors.forename: Amin
authors.initials: A
authors.lastname: Salehi-Khojin
authors.affiliation: Department of Mechanical and Industrial Engineering, University of Illinois at Chicago , Chicago, Illinois 60607, United States.
authors.forename: Farzad
authors.initials: F
authors.lastname: Mashayek
authors.affiliation: Department of Mechanical and Industrial Engineering, University of Illinois at Chicago , Chicago, Illinois 60607, United States.
authors.forename: Reza
authors.initials: R
authors.lastname: Shahbazian-Yassar
keywords: Phosphorene; edge effect; in situ electron microscopy; ionic transport; rechargeable ion battery