Enhancement of luminescence-based optical fiber oxygen sensors by tuning the distance between fluorophore layers

[Display omitted] •The effect of the spacing between luminescent films of oxygen sensors was studied.•Fluorophore layers were spaced by different combinations of polyelectrolytes.•An appropriate spacing between luminescent films prevents from the self-quenching.•Sensors sensitivity and linearity of...

Full description

Saved in:
Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2017-09, Vol.248, p.836-847
Main Authors: de Acha, Nerea, Elosúa, César, Matías, Ignacio R., Arregui, Francisco J.
Format: Article
Language:English
Subjects:
Acrylic acid
Atomic force microscopy
Atomic properties
Cations
Chemical compounds
Fiber optics
Fluorophore distance
Gas detectors
Layer-by-Layer nanoassembly
Linearity
Luminescence
Luminescent sensor
Morphology
Optical fibers
Oxygen
Oxygen probes
Platinum
Polyelectrolytes
Polyethyleneimine
Self-quenching
Sensors
Thickness
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •The effect of the spacing between luminescent films of oxygen sensors was studied.•Fluorophore layers were spaced by different combinations of polyelectrolytes.•An appropriate spacing between luminescent films prevents from the self-quenching.•Sensors sensitivity and linearity of the calibration curves can be optimized.•Morphology of the embedding matrices determines the optimal number of spacing layers. In this work, different luminescence-based optical fiber oxygen sensors have been fabricated by means of the Layer-by-Layer nanoassembly technique. The sensing material employed has been a platinum metalloporphyrin, platinum tetrakis pentafluorophenylporphine (Pt-TFFP), which has been entrapped into anionic micelles. Poly(diallyldimethylammonium chloride) (PDDA), polyethyleneimine (PEI) and poly(allylamine hydrochloride) (PAH) have been utilized as cationic polyelectrolytes. With the aim of avoiding self-quenching and optimizing sensors in terms of sensitivity and linearity of the calibration curves, the spacing (thickness) between the fluorophore films has been tuned by introducing poly(acrylic acid) (PAA) between the cationic layers. The morphology of the resultant sensors has been analyzed with an Atomic Force Microscope. It has been found that the number of spacing layers between the luminescent ones is determined by the features of the employed polycation.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2016.12.081