CAREER: Advanced Optical and Electrical Characterization of Novel Van der Waals Heterostructure Materials

职业：新型范德华异质结构材料的高级光学和电学表征

• 批准号: 1654746
• 负责人: Ming Liu
• 金额: $ 43.26万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1654746&HistoricalAwards=false
• 关键词: CAREER; Advanced; Optical; Electrical; Characterization

Nontechnical Description: With the development of nanotechnology and the shrinkage of device size, local optical and electrical properties are getting increasingly important in dictating the material functionalities, especially for the new class of material that are formed by stacking of material components of extremely small size in different shapes, often called nanotubes, nanowires, or dots. Their electrical and optical properties are sensitive to local imperfections such as impurities and defects. Conventional optical spectroscopy techniques face the difficulty in performing optical spectroscopy imaging with nanometer resolution. The research component of this CAREER award is focused on development of high-intensity, white-light source integrated with a scanning optical microscope to enable full-color imaging of nanoscale surface features. The small size of the light source and its fast decline in intensity over distance enable measurements with high resolution, high intensity and high signal to noise recording for exploring optical and electrical properties of various nanostructured materials. The project aims to integrate research components with various education and outreach activities with graduate and undergraduate students. The University of California at Riverside is a minority serving institution with large Hispanic student population and this project targets at increasing the participation of women and underrepresented minorities. Technical Description: Near-field scanning optical microscopy (NSOM) has been a powerful tool to break the diffraction limit of light for super-resolution images. This project aims to develop a new high-transmittance broad-bandwidth probe for a novel full-color NSOM, and to use it for investigation of the local optical and electrical properties of van der Waals (vdW) materials and heterostructure materials at the nanoscale. The research comprises a combination of vdW heterostructure fabrication, atomic-force-microscopy-integrated NSOM, scanning-tunneling-microscopy-integrated NSOM, and electrical transport measurements. By using this advanced optical characterization tool the research aims to elucidate: (i) the modified light-matter interaction in extremely confined systems; (ii) the optical and electrical properties of two-dimensional heterostructures, such as behavior of localized excitons or trions in graphene-MoS2 heterostructures; (iii) the electrical coupling between plasmonic mono-disperse clusters and graphene monolayer; and (iii) the band structure distributions in individual single-walled carbon nanotubes. The research components are integrated with various education and outreach activities with graduate, undergraduate and high school students, involving students from underrepresented minority groups.

非技术描述：随着纳米技术的发展和器件尺寸的缩小，局部光学和电学特性在决定材料功能方面变得越来越重要，特别是对于通过在纳米材料中堆叠极小尺寸的材料组件而形成的新型材料。不同的形状，通常称为纳米管、纳米线或点。它们的电学和光学特性对杂质和缺陷等局部缺陷很敏感。传统的光谱技术面临着以纳米分辨率进行光谱成像的困难。该职业奖的研究重点是开发与扫描光学显微镜集成的高强度白光源，以实现纳米级表面特征的全彩色成像。光源的小尺寸及其强度随距离的快速下降使得能够进行高分辨率、高强度和高信噪比记录的测量，以探索各种纳米结构材料的光学和电学特性。该项目旨在将研究内容与研究生和本科生的各种教育和外展活动结合起来。加州大学河滨分校是一所少数族裔服务机构，拥有大量西班牙裔学生，该项目旨在提高女性和代表性不足的少数族裔的参与度。技术描述：近场扫描光学显微镜（NSOM）已成为突破光衍射极限以获得超分辨率图像的强大工具。该项目旨在为新型全色NSOM开发一种新型高透过率宽带探针，并用其研究纳米尺度范德华（vdW）材料和异质结构材料的局部光学和电学性质。该研究结合了 vdW 异质结构制造、原子力显微镜集成 NSOM、扫描隧道显微镜集成 NSOM 和电输运测量。通过使用这种先进的光学表征工具，该研究旨在阐明：（i）极其有限的系统中改进的光与物质相互作用； (ii) 二维异质结构的光学和电学性质，例如石墨烯-MoS2异质结构中局域激子或三重子的行为； (iii)等离子体单分散簇与石墨烯单层之间的电耦合； (iii)单个单壁碳纳米管的能带结构分布。研究部分与研究生、本科生和高中生的各种教育和外展活动相结合，其中包括来自代表性不足的少数群体的学生。

项目成果

High external-efficiency nanofocusing for lens-free near-field optical nanoscopy

• DOI: 10.1038/s41566-019-0456-9
• 发表时间: 2019-09-01
• 期刊: NATURE PHOTONICS
• 影响因子: 35
• 作者: Kim, Sanggon;Yu, Ning;Yan, Ruoxue
• 通讯作者: Yan, Ruoxue

Physics-Guided Neural-Network-Based Inverse Design of a Photonic – Plasmonic Nanodevice for Superfocusing

用于超聚焦的光子-等离子体纳米器件的物理引导基于神经网络的逆向设计

• DOI: 10.1021/acsami.2c05083
• 发表时间: 2022
• 期刊: ACS Applied Materials & Interfaces
• 影响因子: 9.5
• 作者: Liang, Boqun;Xu, Da;Yu, Ning;Xu, Yaodong;Ma, Xuezhi;Liu, Qiushi;Asif, M. Salman;Yan, Ruoxue;Liu, Ming
• 通讯作者: Liu, Ming

Toward High-Contrast Atomic Force Microscopy-Tip-Enhanced Raman Spectroscopy Imaging: Nanoantenna-Mediated Remote-Excitation on Sharp-Tip Silver Nanowire Probes

• DOI: 10.1021/acs.nanolett.8b03399
• 发表时间: 2019-01-01
• 期刊: NANO LETTERS
• 影响因子: 10.8
• 作者: Ma, Xuezhi;Zhu, Yangzhi;Liu, Ming
• 通讯作者: Liu, Ming

Ultra-sharp and surfactant-free silver nanowire for scanning tunneling microscopy and tip-enhanced Raman spectroscopy

• DOI: 10.1039/c8nr08983c
• 发表时间: 2019-04-28
• 期刊: NANOSCALE
• 影响因子: 6.7
• 作者: Liu, Qiushi;Kim, Sanggon;Liu, Ming
• 通讯作者: Liu, Ming

Capillary-Force-Assisted Clean-Stamp Transfer of Two-Dimensional Materials

• DOI: 10.1021/acs.nanolett.7b03449
• 发表时间: 2017-11-01
• 期刊: NANO LETTERS
• 影响因子: 10.8
• 作者: Ma, Xuezhi;Liu, Qiushi;Liu, Ming
• 通讯作者: Liu, Ming