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Implementation of Resonance Tracking for Assuring Reliability in Resonance Enhanced Photothermal Infrared Spectroscopy and Imaging

Published

Author(s)

Georg Ramer, Florian Reisenbauer, Benedikt Steindl, Wolfgang Tomischko, Bernhard Lendl

Abstract

Photothermal induced resonance (PTIR) is a method for optical spectroscopy that allows for infrared chemical imaging at spatial resolution below the limit of diffraction. By using the mechanical resonance of the cantilever for amplification the technique has been shown to allow sensitivity down to single mono-layers. In this work we discuss the challenges of performing stable resonant PTIR measurements and how incorrect experimental procedures lead to erroneous results for technique. We also present a controller design that can be used together with a broad range of atomic force microscopes to allow accurate resonance enhanced PTIR measurements. Schematics and program code for the controller are made freely available.
Citation
Applied Spectroscopy
Volume
71
Issue
8

Keywords

PTIR, AFMIR, infrared, resonance tracking, EC-QCL, spectroscopy, near-field, nanoscopy, imaging

Citation

Ramer, G. , Reisenbauer, F. , Steindl, B. , Tomischko, W. and Lendl, B. (2017), Implementation of Resonance Tracking for Assuring Reliability in Resonance Enhanced Photothermal Infrared Spectroscopy and Imaging, Applied Spectroscopy, [online], https://doi.org/10.1177/0003702817695290 (Accessed April 24, 2024)
Created March 14, 2017, Updated November 10, 2018