Correlating spatial chemical information with the morphology of closely packed nanostructures remains a challenge for the scientific community. For example, supramolecular self-assembly, which provides a powerful and low-cost way to create nanoscale patterns and engineered nanostructures, is not easily interrogated in real space via existing nondestructive techniques based on optics or electrons. A novel scanning probe technique called infrared photoinduced force microscopy (IR PiFM) directly measures the photoinduced polarizability of the sample in the near field by detecting the time-integrated force between the tip and the sample. By imaging at multiple IR wavelengths corresponding to absorption peaks of different chemical species, PiFM has demonstrated the ability to spatially map nm-scale patterns of the individual chemical components of two different types of self-assembled block copolymer films. With chemical-specific nanometer-scale imaging, PiFM provides a powerful new analytical method for deepening our understanding of nanomaterials. We will discuss three topics that demonstrate the application potential of PiFM application in energy research: a. nanometer resolution chemical analysis of a solar cell material, the ternary cation halide Cs0.05FA0.81MA0.14PbI2.55Br0.45 (CsFAMA)-based perovskite visual sensor. b. PiFM chemical imaging of a low cost high performance polymer solar cells with donor poly[(thiophene)-alt-(6,7-difluoro-2-(2-hexyldecyloxy) quinoxaline)] (PTQ10). c. PiFM chemical imaging of lithium-ion migration during the charging process. We observed the high resolution mapping of delithiation process

Photo induced force microscopy based nanometer resolution IR spectroscopy and application in energy research

ACS Spring 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.