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| Keywords: Photothermal Induced Resonance (PTIR) (8477045638).jpg The sample green/white absorbs infrared laser light purple at wavelengths determined by its chemical composition causing it to expand which deflects the AFM cantilever Bottom left The AFM detects the height of two small polystyrene particles and a large polymethylmethacrylate PMMA particle Bottom right The light is tuned to be absorbed only by PMMA but not by polystyrene Combining the data and recording chemical images at different wavelengths produces a map of the surface's topography and chemistry See also http //www nist gov/cnst/ptir-021213 cfm www nist gov/cnst/ptir-021213 cfm Credit Centrone/NIST Disclaimer Any mention of commercial products within NIST web pages is for information only; it does not imply recommendation or endorsement by NIST Use of NIST Information These World Wide Web pages are provided as a public service by the National Institute of Standards and Technology NIST With the exception of material marked as copyrighted information presented on these pages is considered public information and may be distributed or copied Use of appropriate byline/photo/image credits is requested https //www flickr com/photos/usnistgov/8477045638/ Photothermal Induced Resonance PTIR 2013-02-13 11 07 https //www flickr com/people/63059536 N06 National Institute of Standards and Technology PD-USGov National Institute of Standards and Technology https //flickr com/photos/63059536 N06/8477045638 2016-09-07 01 55 07 United States Government Work Uncategorized 2016 October 20 | ||||
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