Peak Force Infrared - Kelvin Probe Force Microscopy

Devon S Jakob, Haomin Wang, Guanghong Zeng, Daniel E Otzen, Yong Yan, Xiaoji Xu

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Correlative scanning probe microscopy of chemical identity, surface potential, and mechanical properties provides insight into structure-functional relationships of nanomaterials. However, simultaneous measurement with comparable and high resolution is a challenge. Here, we seamlessly integrate nanoscale photothermal infrared imaging with Coulomb force detection to form Peak Force Infrared - Kelvin Probe Force Microscopy (PFIR-KPFM), which enables simultaneous nano-mapping of infrared absorption, surface potential, and mechanical properties with ~10 nm spatial resolution in a single-pass scan. MAPbBr 3 perovskite crystals of different degradation pathways are studied in situ . Nanoscale charge accumulations are observed in MAPbBr 3 near the boundary to PbBr 2 . PFIR-KPFM also reveals correlations between residual charges and secondary conformation in amyloid fibrils. PFIR-KPFM is applicable to other heterogeneous materials at the nanoscale for correlative multimodal characterizations.

TidsskriftAngewandte Chemie International Edition
Sider (fra-til)16083-16090
Antal sider8
StatusUdgivet - sep. 2020


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