Anisotropic electrical properties of aligned PtSe_(2) nanoribbon arrays grown by a pre-patterned selective selenization process
作者机构：School of Integrated CircuitsBeijing National Research Center for Information Science and Technology(BNRist)Tsinghua UniversityBeijing 100084China Department of ChemistryTsinghua UniversityBeijing 100084China School of Integrated Circuits and ElectronicsBeijing Institute of TechnologyBeijing 100081China Institute of Functional Nano&Soft Materials(FUNSOM)Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China State Key Lab of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2022年第15卷第5期
页 面：4668-4676页
核心收录：
学科分类：07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 0702[理学-物理学]
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).
主 题：PtSe_(2) scalable production anisotropic properties nanoribbons density functional theory
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.
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