Comparative study of polymeric matrices embedding oxygen-sensitive fluorophores by means of Layer-by-Layer nanosassembly

Nerea de Acha, César Elosúa, Deborah Martínez, Miguel Hernáez, Ignacio R. Matías, Francisco J. Arregui

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11 Citations (Scopus)
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In this work, a comparative study of luminescent optical fiber oxygen sensors fabricated by means of Layer-by-Layer nanoassembly technique (LbL) has been carried out. The oxygen-sensitive fluorophore is the same in all the cases, the metalloporphyrin platinum tetrakis pentafluorophenylporphin (Pt-TFPP), which was deposited using LbL method by entrapping it into anionic micelles formed with a surfactant. As cationic counterpart to form the anionic-cationic bilayer, different polyelectrolytes acting as the polymeric matrices embedding the sensing material have been studied: poly(diallyldimethylammonium chloride) (PDDA), polyethyleneimine (PEI) and poly(allylamine hydrochloride) (PAH). Absorbance spectra, contact angle, Atomic Force Microscope and Scanning Electronic Microscope analysis were performed on the sensing films. The kinetics, resolution and sensitivity of the sensors for different number of bilayers were also determined. It has been found a remarkable difference on these characteristics depending on the polymer used.

Original languageEnglish
Pages (from-to)1124-1133
Number of pages10
JournalSensors and Actuators, B: Chemical
Early online date13 Aug 2016
Publication statusPublished - Feb 2017


  • Layer-by-Layer nanoassembly
  • Luminescence oxygen sensor
  • Nano morphology
  • Optical fiber
  • Polycations

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