Zeitschriftenartikel:
G. Ramer, F. Reisenbauer, B. Steindl, W. Tomischko, B. Lendl:
"Implementation of Resonance Tracking for Assuring Reliability in Resonance Enhanced Photothermal Infrared Spectroscopy and Imaging";
Applied Spectroscopy,
71
(2017),
8;
S. 2013
- 2020.
Kurzfassung englisch:
Photothermal-induced resonance (PTIR) is a method for optical spectroscopy that allows for infrared (IR) 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 monolayers.
In this work, we discuss the challenges that must be overcome for performing stable resonant PTIR measurements and
how imprecise experimental procedures can lead to irreproducible or even erroneous results. We also present a controller
design that continuously readjusts the excitation frequency of a PTIR setup back to the resonance frequency in
order to allow for accurate resonance-enhanced PTIR measurements. This controller can be used together with a broad
range of atomic force microscopes. Schematics and program code for the controller are made freely available.
"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1177/0003702817695290
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.