Multimodal Chemical Nano-imaging and Spectroscopy through Peak Force Infrared Microscopy

Xiaoji G. Xu

doi:10.1117/12.2593779

1 August 2021 Multimodal Chemical Nano-imaging and Spectroscopy through Peak Force Infrared Microscopy

Xiaoji G. Xu

Proceedings Volume 11803, Enhanced Spectroscopies and Nanoimaging 2021; 118030D (2021) https://doi.org/10.1117/12.2593779
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

Abbe’s diffraction limit prevents straightforwardly resolving the micro/nanoscale heterogeneous materials with mid infrared light. In this presentation, I will describe our invention on peak force infrared (PFIR) microscopy . The PFIR microscopy utilizes temporal domain mechanical detection of the tip-enhanced infrared photothermal response of the sample with a nanoscopic atomic force microscope (AFM) tip. The PFIR works in both air phase and liquid phase. We have demonstrated the imaging capability of PFIR on a wide range of materials from block copolymer, amyloid fibril, cellular structures to secondary organic aerosols, oil shale source rock, and two-dimensional polaritonic materials. A spatial resolution of 6 nm is demonstrated across different types of samples. In addition, we have integrated the PFIR microscopy with other modalities of chemical measurement and imaging, including mechanical property measurement and surface potential mapping.

Conference Presentation

Citation Download Citation

Xiaoji G. Xu "Multimodal Chemical Nano-imaging and Spectroscopy through Peak Force Infrared Microscopy", Proc. SPIE 11803, Enhanced Spectroscopies and Nanoimaging 2021, 118030D (1 August 2021); https://doi.org/10.1117/12.2593779

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