<div class="csl-bib-body">
<div class="csl-entry">Zhang, Y., Yilmaz, U., Lendl, B., & Ramer, G. (2022, June 20). <i>Towards a point spread function for nanoscale chemical imaging</i> [Poster Presentation]. 21st International Conference on Photoacoustic and Photothermal Phenomena, Bled, Slovenia. http://hdl.handle.net/20.500.12708/153196</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/153196
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dc.description.abstract
Atomic force microscopy-infrared (AFM-IR) is an AFM based technique that measures mid-IR absorption spectra at nanometre spatial resolution. One of the most attractive advantages of AFM-IR for chemical spectroscopist is that it provides spectra which compare well to conventional FTIR absorption spectra [1]. The technique of AFM-IR relies on the detection of the pulsed wavelength tuneable IR laser induced thermal expansion of the sample area underneath the AFM tip. While this mode of signal generation sounds simple enough it is still not fully understood.
In this work, we present a theoretical investigation of the laser heating induced thermal expansion process and model it as a point spread function (PSF). This approach draws parallels to super resolution microscopy where the PSF is used to determine spatial resolution and to resolve features below the diffraction limit [2]. The biggest challenge in determining the PSF of AFM-IR is fact that it relies on the thermal diffusion process and depends on material and sample properties in addition to the time / frequency.
Our approach is comprised of finite element simulations, and theoretical considerations which are verified experimentally using confocal microscopy and AFM-IR experiments. We investigate the influence of material properties, IR laser properties, sample thickness, vertical positions of the samples well as laser repetition rate and pulse length on the AFM-IR spatial resolution.
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dc.description.sponsorship
European Commission
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dc.language.iso
en
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dc.subject
AFM-IR
en
dc.subject
Chemical imaging
en
dc.subject
point spread function
en
dc.title
Towards a point spread function for nanoscale chemical imaging
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.relation.grantno
860808
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dc.type.category
Poster Presentation
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tuw.project.title
European Joint Doctorate Programme on Optical Sensing using Advanced Photo-Induced Effects
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tuw.researchinfrastructure
Vienna Scientific Cluster
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tuw.researchTopic.id
Q1
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tuw.researchTopic.id
Q13
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tuw.researchTopic.id
M8
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tuw.researchTopic.name
Photonics
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tuw.researchTopic.name
Modeling and Simulation
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tuw.researchTopic.name
Structure-Property Relationsship
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tuw.researchTopic.value
20
-
tuw.researchTopic.value
50
-
tuw.researchTopic.value
30
-
tuw.linking
https://indico.ung.si/event/5/
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tuw.publication.orgunit
E164-02-1 - Forschungsgruppe Prozessanalytik
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tuw.author.orcid
0000-0002-2675-739X
-
tuw.author.orcid
0000-0003-3838-5842
-
tuw.author.orcid
0000-0001-8307-5435
-
tuw.event.name
21st International Conference on Photoacoustic and Photothermal Phenomena
en
tuw.event.startdate
19-06-2022
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tuw.event.enddate
24-06-2022
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tuw.event.online
Hybrid
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tuw.event.type
Event for scientific audience
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tuw.event.place
Bled
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tuw.event.country
SI
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tuw.event.presenter
Zhang, Yide
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tuw.event.track
Single Track
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wb.sciencebranch
Chemie
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch
Mathematik
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wb.sciencebranch.oefos
1040
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wb.sciencebranch.oefos
1030
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wb.sciencebranch.oefos
1010
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wb.sciencebranch.value
20
-
wb.sciencebranch.value
30
-
wb.sciencebranch.value
50
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item.languageiso639-1
en
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item.openairetype
conference poster not in proceedings
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item.grantfulltext
restricted
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item.fulltext
no Fulltext
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item.cerifentitytype
Publications
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item.openairecristype
http://purl.org/coar/resource_type/c_18co
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crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
-
crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
-
crisitem.author.dept
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
-
crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
-
crisitem.author.orcid
0000-0002-2675-739X
-
crisitem.author.orcid
0009-0009-3572-5267
-
crisitem.author.orcid
0000-0003-3838-5842
-
crisitem.author.orcid
0000-0001-8307-5435
-
crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
-
crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
-
crisitem.author.parentorg
E164 - Institut für Chemische Technologien und Analytik
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crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
