Anisotropic electrical properties of aligned PtSe_(2) nanoribbon arrays grown by a pre-patterned selective selenization process  

作　　者：Huaipeng Wang Zhifang Liu Yilin Sun Xiaofan Ping Jianlong Xu Yingtao Ding Haowen Hu Dan Xie Tianling Ren 

机构地区：[1]School of Integrated Circuits,Beijing National Research Center for Information Science and Technology(BNRist),Tsinghua University,Beijing 100084,China [2]Department of Chemistry,Tsinghua University,Beijing 100084,China [3]School of Integrated Circuits and Electronics,Beijing Institute of Technology,Beijing 100081,China [4]Institute of Functional Nano&Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices,Soochow University,Suzhou 215123,China [5]State Key Lab of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Nano Research》2022年第5期4668-4676,共9页纳米研究（英文版）

基　　金：The authors are grateful for the financial support from the National Natural Science Foundation of China(Nos.52072204 and 62104017);the National Postdoctoral Program for Innovative Talents of China(No.BX20200049);China Postdoctoral Science Foundation(No.2021M690013).

摘　　要：This study proposes a feasible and scalable production strategy to naturally obtain aligned platinum diselenide(PtSe_(2))nanoribbon arrays with anisotropic conductivity.The anisotropic properties of two-dimensional(2D)materials,especially transition-metal dichalcogenides(TMDs),have attracted great interest in research.The dependence of physical properties on their lattice orientations is of particular interest because of its potential in diverse applications,such as nanoelectronics and optoelectronics.One-dimensional(1D)nanostructures facilitate many feasible production strategies for shaping 2D materials into unidirectional 1D nanostructures,providing methods to investigate the anisotropic properties of 2D materials based on their lattice orientations and dimensionality.The natural alignment of zigzag(ZZ)PtSe_(2) nanoribbons is experimentally demonstrated using angle-resolved polarized Raman spectroscopy(ARPRS),and the selective growth mechanism is further theoretically revealed by comparing edges and edge energies of different orientations using the density functional theory(DFT).Back-gate field-effect transistors(FETs)are also constructed of unidirectional PtSe_(2) nanoribbons to investigate their anisotropic electrical properties,which align with the results of the projected density of states(DOS)calculations.This work provides new insight into the anisotropic properties of 2D materials and a feasible investigation strategy from experimental and theoretical perspectives.

关 键 词：PtSe_(2) scalable production anisotropic properties NANORIBBONS density functional theory 

分 类 号：O61[理学—无机化学]