Volume 132, Issue 37 pp. 16217-16224
Forschungsartikel

Peak Force Infrared–Kelvin Probe Force Microscopy

Devon S. Jakob

Devon S. Jakob

Department of Chemistry, Lehigh University, 6 E Packer Ave., Bethlehem, PA, 18015 USA

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Haomin Wang

Haomin Wang

Department of Chemistry, Lehigh University, 6 E Packer Ave., Bethlehem, PA, 18015 USA

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Dr. Guanghong Zeng

Dr. Guanghong Zeng

DFM A/S, Danish National Metrology Institute, Kogle Alle 5, 2970 Hørsholm, Denmark

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Dr. Daniel E. Otzen

Dr. Daniel E. Otzen

Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wields Vej 14, 8000 Aarhus C, Denmark

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Dr. Yong Yan

Dr. Yong Yan

Department of Chemistry, San Diego State University, 5500 Campanile Dr., San Diego, CA, 92182 USA

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Dr. Xiaoji G. Xu

Corresponding Author

Dr. Xiaoji G. Xu

Department of Chemistry, Lehigh University, 6 E Packer Ave., Bethlehem, PA, 18015 USA

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First published: 28 May 2020
Citations: 10

Abstract

Correlative scanning probe microscopy of chemical identity, surface potential, and mechanical properties provide insight into the structure–function relationships of nanomaterials. However, simultaneous measurement with comparable and high resolution is a challenge. We seamlessly integrated nanoscale photothermal infrared imaging with Coulomb force detection to form peak force infrared–Kelvin probe force microscopy (PFIR-KPFM), which enables simultaneous nanomapping of infrared absorption, surface potential, and mechanical properties with approximately 10 nm spatial resolution in a single-pass scan. MAPbBr3 perovskite crystals of different degradation pathways were studied in situ. Nanoscale charge accumulations were observed in MAPbBr3 near the boundary to PbBr2. PFIR-KPFM also revealed 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.

Conflict of interest

The authors declare no conflict of interest.

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