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Khan, Muhammad Shaukat [Verfasser:in]; Farooq, Hunain [Verfasser:in]; Wittmund, Christopher [Verfasser:in]; Klimke, Stephen [Verfasser:in]; Lachmayer, Roland [Verfasser:in]; Renz, Franz [Verfasser:in]; Roth, Bernhard [Verfasser:in]

Polymer Optical Waveguide Sensor Based on Fe-Amino-Triazole Complex Molecular Switches - [published Version]

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  • Medientyp: Sonstige Veröffentlichung; E-Artikel
  • Titel: Polymer Optical Waveguide Sensor Based on Fe-Amino-Triazole Complex Molecular Switches
  • Beteiligte: Khan, Muhammad Shaukat [Verfasser:in]; Farooq, Hunain [Verfasser:in]; Wittmund, Christopher [Verfasser:in]; Klimke, Stephen [Verfasser:in]; Lachmayer, Roland [Verfasser:in]; Renz, Franz [Verfasser:in]; Roth, Bernhard [Verfasser:in]
  • Erschienen: Basel : MDPI, 2021
  • Erschienen in: Polymers 13 (2021), Nr. 2
  • Ausgabe: published Version
  • Sprache: Englisch
  • DOI: https://doi.org/10.15488/11200; https://doi.org/10.3390/polym13020195
  • Schlagwörter: microfabrication ; maskless lithography ; temperature sensor ; hot embossing ; polymer optical sensor ; iron-triazole complexes ; memory effect
  • Entstehung:
  • Anmerkungen: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Beschreibung: 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.
  • Zugangsstatus: Freier Zugang
  • Rechte-/Nutzungshinweise: Namensnennung (CC BY)