<div class="csl-bib-body">
<div class="csl-entry">Yilmaz, U., Sam, S., Lendl, B., & Ramer, G. (2024). Bottom-illuminated photothermal nanoscale chemical imaging with a flat silicon ATR in air and liquid. <i>Analytical Chemistry</i>, <i>96</i>(11), 4410–4418. https://doi.org/10.1021/acs.analchem.3c04348</div>
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dc.identifier.issn
0003-2700
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/198159
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dc.description.abstract
We demonstrate a novel approach for bottom-illuminated atomic force microscopy and infrared spectroscopy (AFM-IR). Bottom-illuminated AFM-IR for measurements in liquids makes use of an attenuated total reflection setup where the developing evanescent wave is responsible for photothermal excitation of the sample of interest. Conventional bottom-illuminated measurements are conducted using high-refractive-index prisms. We showcase the advancement of instrumentation through the introduction of flat silicon substrates as replacements for prisms. We illustrate the feasibility of this technique for bottom-illuminated AFM-IR in both air and liquid. We also show how modern rapid prototyping technologies enable commercial AFM-IR instrumentation to accept these new substrates. This new approach paves the way for a wide range of experiments since virtually any established protocol for Si surface functionalization can be applied to this sample carrier. Furthermore, the low unit cost enables the rapid iteration of experiments.
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dc.description.sponsorship
European Commission
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dc.description.sponsorship
European Commission
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dc.description.sponsorship
European Commission
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dc.language.iso
en
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dc.publisher
AMER CHEMICAL SOC
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dc.relation.ispartof
Analytical Chemistry
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dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
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dc.subject
AFM-IR
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dc.subject
EC-QCL
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dc.subject
chemical imaging
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dc.subject
nanoscale
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dc.subject
infrared spectroscopy
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dc.title
Bottom-illuminated photothermal nanoscale chemical imaging with a flat silicon ATR in air and liquid