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Time–Temperature Integrating Optical Sensors Based on Gradient Colloidal Crystals

Title data

Schöttle, Marius ; Tran, Thomas ; Feller, Tanja ; Retsch, Markus:
Time–Temperature Integrating Optical Sensors Based on Gradient Colloidal Crystals.
In: Advanced Materials. Vol. 33 (October 2021) Issue 40 . - No. 2101948.
ISSN 1521-4095
DOI: https://doi.org/10.1002/adma.202101948

Official URL: Volltext

Project information

Project financing: ERC Horizon 2020 VISIRDay grant agreement no. 714968 BayBatt (Bayerische Batterieforschungszentrum) ENB Elite Netzwerk Bayern

Abstract in another language

Manipulation-free and autonomous recording of temperature states for extended periods of time is of increasing importance for food spoilage and battery safety assessment. An optical readout is preferred for low-tech visual inspection. Here, a concept for time–temperature integrators based on colloidal crystals is introduced. Two unique features in this class of advanced materials are combined: 1) the film-formation kinetics can be controlled by orders of magnitude based on mixtures of particles with distinct glass transition temperatures. 2) A gradual variation of the particle mixture along a linear gradient of the colloidal crystal enables local readout. Tailor-made latex particles of identical size but different glass transition temperatures provide a homogenous photonic stopband. The disappearance of this opalescence is directly related to the local particle ratio and the exposure to a time and temperature combination. This sensing material can be adjusted to report extended intermediate and short excessive temperature events, which makes it specifically suitable for long-term tracing and threshold applications.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry I
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry I > Chair Physical Chemistry I - Univ.-Prof. Dr. Markus Retsch
Profile Fields > Advanced Fields > Polymer and Colloid Science
Profile Fields > Advanced Fields > Advanced Materials
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF
Research Institutions > Research Centres > Bayreuth Center for Colloids and Interfaces - BZKG
Research Institutions > Research Centres > Bayerisches Zentrum für Batterietechnik - BayBatt
Research Institutions > Affiliated Institutes > Bavarian Polymer Institute (BPI)
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 13 Oct 2021 08:01
Last Modified: 13 Oct 2021 08:01
URI: https://eref.uni-bayreuth.de/id/eprint/67302