<div class="csl-bib-body">
<div class="csl-entry">Zimmerl, M., Kaltenböck Paul, Whitmore, K., & Gebeshuber, I.-C. (2024, May 14). <i>Biomimetics of passive radiative cooling properties of Silver Ants</i> [Poster Presentation]. Exner Lectures 2024, Wien, Austria. http://hdl.handle.net/20.500.12708/197686</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/197686
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dc.description.abstract
The increasing occurrence of hot summer days causes stress for both humans and animals, particularly in urban areas where temperatures can remain high, even at night. Living nature offers potential solutions that require minimal energy and material costs. For instance, the Saharan silver ant (Cataglyphis bombycina) can endure the desert heat by means of passive radiative cooling induced by its triangular hairs. The objective of this study is to transfer the structural cooling properties of the ant body to various surfaces. Appling the presented techniques on a larger scale, for example on house facades, can decrease the need for conventional cooling and therefore lower the energy demand.
Shrimp shells have been selected as the initial target surface due to their low cost, biodegradability, and similarity in material to the ant body (chitin). Although ultimately shrimp shells turned out to be too hard to be modified with sensitive methods, we found that chitin shows good weather resistance and is therefore suitable for outdoor use cases.
Chemically altered chitin, known as chitosan, has a range of medical uses but can also be processed into a paper-like film. The procedure consists of dissolving chitosan in diluted acetic acid and uniformly distributing it on a flat surface. A structure can then be imprinted onto the film while it is drying. We successfully transferred the structural color of a CD onto the film.
Our ongoing work involves the creation of a polyvinyl siloxane imprint of the ant body. This imprint shall then be transferred onto a chitosan film. By comparing FT-IR spectroscopy measurements of the emissivity of flat and structured film, we intend to demonstrate that it is possible to increase the IR-emissivity and therefore decrease the surface temperature purely through functionalities induced via surface modification.
en
dc.language.iso
en
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dc.subject
passive radiative cooling
en
dc.subject
functional structures
en
dc.subject
biomimetics
en
dc.subject
structural coloration
en
dc.title
Biomimetics of passive radiative cooling properties of Silver Ants
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
TU Wien, Austria
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dc.contributor.affiliation
TU Wien, Austria
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dc.type.category
Poster Presentation
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tuw.researchTopic.id
M2
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tuw.researchTopic.id
M6
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tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.name
Biological and Bioactive Materials
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tuw.researchTopic.value
50
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tuw.researchTopic.value
50
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tuw.publication.orgunit
E134-03 - Forschungsbereich Atomic and Plasma Physics
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tuw.author.orcid
0009-0004-9670-122X
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tuw.author.orcid
0000-0002-8041-2069
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tuw.author.orcid
0000-0001-8879-2302
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tuw.event.name
Exner Lectures 2024
en
tuw.event.startdate
14-05-2024
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tuw.event.enddate
14-05-2024
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tuw.event.online
On Site
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tuw.event.type
Event for scientific audience
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tuw.event.place
Wien
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tuw.event.country
AT
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tuw.event.presenter
Zimmerl, Markus
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch.oefos
1030
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wb.sciencebranch.value
100
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item.fulltext
no Fulltext
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item.openairecristype
http://purl.org/coar/resource_type/c_18co
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item.languageiso639-1
en
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item.cerifentitytype
Publications
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item.openairetype
conference poster not in proceedings
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item.grantfulltext
restricted
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crisitem.author.dept
TU Wien, Austria
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crisitem.author.dept
TU Wien
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crisitem.author.dept
E057-02 - Fachbereich Universitäre Serviceeinrichtung für Transmissions- Elektronenmikroskopie
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crisitem.author.dept
E134-03 - Forschungsbereich Atomic and Plasma Physics
