Implementation of Resonance Tracking for Assuring Reliability in Resonance Enhanced Photothermal Infrared Spectroscopy and Imaging
| Autor: | Georg Ramer, Florian Reisenbauer, Wolfgang Tomischko, Bernhard Lendl, Benedikt Steindl |
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| Rok vydání: | 2017 |
| Předmět: |
Chemical imaging
Materials science business.industry Infrared Infrared spectroscopy Resonance 02 engineering and technology Photothermal therapy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention law Optoelectronics 0210 nano-technology Quantum cascade laser Spectroscopy business Instrumentation Image resolution |
| Zdroj: | Applied Spectroscopy. 71:2013-2020 |
| ISSN: | 1943-3530 0003-7028 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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