evaluation of the ph-sensitive swelling of a hydrogel by means of a plasmonic sensor substrate

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ID: 192530
2018
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Abstract
The inline monitoring of parameters in aqueous liquids is facing an increasing demand in many different application areas. Hydrogels with pH-induced swelling and deswelling behavior offer a means to measure pH in such liquids. Here we investigate the optical interrogation of a pH-sensitive hydrogel which can be applied in the physiological pH range. For this, a nanostructured gold substrate supporting surface plasmon oscillations is coated with a HPMA/DMAEMA/TEGDMA/EG hydrogel. The gel swells in the pH range under investigation (here 4.5 to 6.5), and the resulting refractive index changes subsequently lead to a spectral shift of the plasmon resonance of the gold nanostructure. The spectral resonance position is determined from optical transmittance spectra of the sensor substrates, and the initial results for our hydrogel reported here indicate a nearly linear dependence between the swelling state and the plasmon resonance wavelength.
Reference Key
kroh2018journalevaluation Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;C. Kroh;C. Kroh;R. Wuchrer;M. Günther;T. Härtling;T. Härtling;G. Gerlach
Journal arabic literature in the post-classical period
Year 2018
DOI
10.5194/jsss-7-51-2018
URL
https://www.j-sens-sens-syst.net/7/51/2018/jsss-7-51-2018.pdf
Keywords
Technology

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