60 MeV 氮离子辐照对少层 WSe2 纳米系统的影响

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-06-21 DOI:10.1016/j.nimb.2024.165438

Bhupali Deka , Dhanjit Talukdar , D. Mohanta

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引用次数: 0

摘要

本研究探讨了 60 MeV N5+ 离子辐照对少层 WSe2 系统的影响。结构分析表明，随着辐照后晶粒长大，晶粒尺寸出现异常变化。拉曼光谱研究显示，无序度增加，突出模式的强度增强，原子力显微镜测量的粗糙度从 27.2 纳米增加到 212.6 纳米，增加了八倍。HR-TEM 显示了辐照后纳米片中的空隙。此外，对带有空位簇的单层进行的 DFT 计算显示，WSe2 带隙从 1.48 eV 变为 0.37 eV。相互关联的结构、形态和电子结构计算将为受控辐照提供有用的见解。

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Effect of 60 MeV nitrogen ion irradiation on few layer WSe2 nanosystems

This study explores the impact of 60 MeV N⁵⁺ ion irradiation on few layer WSe₂ systems. The structural analysis exhibit an anomalous variation in crystallite size with increasing grain growth after irradiation. Raman spectroscopy study reveals increased disorder, enhanced intensities of prominent modes, and an eight-fold rise in AFM-measured roughness from 27.2 nm to 212.6 nm. HR-TEM shows voids in nanosheets post-irradiation. In addition, DFT calculations on monolayer with vacancy clusters shows modification of WSe₂ bandgap from 1.48 eV to 0.37 eV. Interrelated structural, morphological and electronic structure calculations would provide useful insights upon controlled radiation exposure.

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来源期刊

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 物理-核科学技术

CiteScore

2.80

自引率

7.70%

发文量

231

审稿时长

1.9 months

期刊介绍： Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.