dc.identifier.uri |
http://dx.doi.org/10.15488/11200 |
|
dc.identifier.uri |
https://www.repo.uni-hannover.de/handle/123456789/11286 |
|
dc.contributor.author |
Khan, Muhammad Shaukat
|
|
dc.contributor.author |
Farooq, Hunain
|
|
dc.contributor.author |
Wittmund, Christopher
|
|
dc.contributor.author |
Klimke, Stephen
|
|
dc.contributor.author |
Lachmayer, Roland
|
|
dc.contributor.author |
Renz, Franz
|
|
dc.contributor.author |
Roth, Bernhard
|
|
dc.date.accessioned |
2021-08-13T06:50:27Z |
|
dc.date.available |
2021-08-13T06:50:27Z |
|
dc.date.issued |
2021 |
|
dc.identifier.citation |
Khan, M.S.; Farooq, H.; Wittmund, C.; Klimke, S.; Lachmayer, R. et al.: Polymer Optical Waveguide Sensor Based on Fe-Amino-Triazole Complex Molecular Switches. In: Polymers 13 (2021), Nr. 2, 195. DOI: https://doi.org/10.3390/polym13020195 |
|
dc.description.abstract |
We report on a polymer-waveguide-based temperature sensing system relying on switchable molecular complexes. The polymer waveguide cladding is fabricated using a maskless lithographic optical system and replicated onto polymer material (i.e., PMMA) using a hot embossing device. An iron-amino-triazole molecular complex material (i.e., [Fe(Htrz)2.85(NH2-trz)0.15](ClO4)2) is used to sense changes in ambient temperature. For this purpose, the core of the waveguide is filled with a mixture of core material (NOA68), and the molecular complex using doctor blading and UV curing is applied for solidification. The absorption spectrum of the molecular complex in the UV/VIS light range features two prominent absorption bands in the low-spin state. As temperature approaches room temperature, a spin-crossover transition occurs, and the molecular complex changes its color (i.e. spectral properties) from violet-pink to white. The measurement of the optical power transmitted through the waveguide as a function of temperature exhibits a memory effect with a hysteresis width of approx. 12 °C and sensitivity of 0.08 mW/°C. This enables optical rather than electronic temperature detection in environments where electromagnetic interference might influence the measurements. |
eng |
dc.language.iso |
eng |
|
dc.publisher |
Basel : MDPI |
|
dc.relation.ispartofseries |
Polymers 13 (2021), Nr. 2 |
|
dc.rights |
CC BY 4.0 Unported |
|
dc.rights.uri |
https://creativecommons.org/licenses/by/4.0/ |
|
dc.subject |
polymer optical sensor |
eng |
dc.subject |
microfabrication |
eng |
dc.subject |
temperature sensor |
eng |
dc.subject |
memory effect |
eng |
dc.subject |
iron-triazole complexes |
eng |
dc.subject |
hot embossing |
eng |
dc.subject |
maskless lithography |
eng |
dc.subject.ddc |
540 | Chemie
|
ger |
dc.title |
Polymer Optical Waveguide Sensor Based on Fe-Amino-Triazole Complex Molecular Switches |
|
dc.type |
Article |
|
dc.type |
Text |
|
dc.relation.essn |
2073-4360 |
|
dc.relation.doi |
https://doi.org/10.3390/polym13020195 |
|
dc.bibliographicCitation.issue |
2 |
|
dc.bibliographicCitation.volume |
13 |
|
dc.bibliographicCitation.firstPage |
195 |
|
dc.description.version |
publishedVersion |
|
tib.accessRights |
frei zug�nglich |
|