Peak Force Infrared - Kelvin Probe Force Microscopy

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DOI

  • Devon S Jakob, Lehigh Univ, Lehigh University
  • ,
  • Haomin Wang, Lehigh Univ, Lehigh University
  • ,
  • Guanghong Zeng, Danmarks Nationale Metrologiinstitut
  • ,
  • Daniel E Otzen
  • Yong Yan, San Diego State Univ, California State University System, San Diego State University, Dept Biol
  • ,
  • Xiaoji Xu, Lehigh Univ, Lehigh University

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.

Original languageEnglish
JournalAngewandte Chemie International Edition
ISSN1433-7851
DOIs
Publication statusE-pub ahead of print - 28 May 2020

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