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Micro-photoacoustic infrared spectroscopy

DOI: 10.1016/j.infrared.2018.07.030 DOI Help

Authors: Kirk H. Michaelian (Natural Resources Canada) , Mark D. Frogley (Diamond Light Source) , Chris S. Kelley (Diamond Light Source) , Tor Pedersen (Canadian Light Source Inc.) , Tim E. May (Canadian Light Source Inc.) , Luca Quaroni (Canadian Light Source Inc.; Institute of Nuclear Physics, Polish Academy of Sciences; Jagiellonian University) , Gianfelice Cinque (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Infrared Physics & Technology

State: Published (Approved)
Published: July 2018
Diamond Proposal Number(s): 13668

Open Access Open Access

Abstract: This investigation establishes, for the first time, the viability of micro-photoacoustic infrared spectroscopy (microPAS). A cell that allows photoacoustic (PA) infrared spectroscopy measurements on small samples was constructed and tested in this work. The setup allows visualizing the sample and selecting specific measurement positions. It can be used with conventional Fourier-Transform infrared spectrometers and a variety of light sources, including conventional near- and mid-infrared lamps, synchrotron radiation, and laser sources. The cell was successfully used to discriminate between individual polymer beads based on differences between their PA spectra. The demonstrated spatial resolution is better than 100 µm and, in at least one case, as good as 20 µm.

Journal Keywords: microPAS; FT-IR; microspectroscopy; photoacoustic spectroscopy

Subject Areas: Physics, Technique Development

Instruments: B22-Multimode InfraRed imaging And Microspectroscopy

Other Facilities: Canadian Light Source