Localized (5 μm) probing and detailed mapping of hair with synchrotron powered FT-IR microspectroscopy

Physics

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Spectra, Photodissociation, And Photoionization, Luminescence, Infrared And Raman Spectroscopy

Scientific paper

The thickness and high absorptivity of single hairs typically result in the saturation of major infrared bands and their distortion. Single human hairs longitudinally microtomed and mounted on mirror slides were scanned routinely in the past with a 20 μm×100 μm aperture that limited spatial resolution for localized probing and detailed mapping. Use of the nondivergent, bright, and low-noise synchrotron source for FT-IR microspectroscopy enables good S/N even at apertures as small as 5-6 μm. Functional group mapping as well as localized probing for extraneous materials illustrates the utility of this powerful probe.

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