qPlus型非接触原子力显微技术进展及前沿应用

原子力显微镜(AFM)通过探测针尖与样品之间的相互作用力获得样品表面的结构信息。基于qPlus传感器的非接触原子力显微镜(NC-AFM)在传统AFM的基础上进一步提升了空间分辨率,为研究表面物理和化学过程提供了一种新的成像和谱学研究技术。本文首先介绍NC-AFM的基本构造、高分辨成像机制和力谱测量等工作原理,总结了近年来NC-AFM在表面在位化学反应、低维材料表征和表面电荷分布测量等方面的应用,探讨了NC-AFM技术的发展与完善,展望了NC-AFM面临的机遇和挑战。

Research Progress and Applications of qPlus Noncontact Atomic Force Microscopy

Atomic force microscopy (AFM) is used to investigate surface structures by measuring the interaction force between the tip and sample. Non-contact AFM (NC-AFM) that incorporates a qPlus sensor further enhances the spatial resolution of scanning probe microscopy based on traditional AFM principles. In this perspective, we give a brief introduction to the mechanisms of high-resolution imaging and force measurements using NC-AFM. We then summarize recent applications of NC-AFM in the fields of on-surface chemical reactions, low-dimensional materials, surface charge distribution in molecules, as well as technical improvements and developments of NC-AFM technologies. The opportunities and challenges for NC-AFM technologies are also presented.