Article (Scientific journals)
Optical Fiber Gratings Immunoassays
Loyez, Médéric; Lobry, Maxime; Wattiez, Ruddy et al.
2019In Sensors, 19 (11), p. 2595
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Keywords :
[en] optical fiber; [en] sensor; [en] biosensor
Abstract :
[en] Optical fibers are of growing interest for biosensing, especially for point-of-care and biomedical assays. Their intrinsic properties bestow them sought-after assets for the detection of low concentrations of analytes. Tilted fiber Bragg gratings (TFBGs) photo-inscribed in the core of telecommunication-grade optical fibers are known to be highly-sensitive refractometers. In this work, we present different strategies to use them for label-free immunoassays. Bare, gold-sputtered, gold-electroless-plated (ELP) and hybrid configurations are biofunctionalized with antibodies, aiming at the detection of cancer biomarkers. We discuss the relative performances of the tested configurations and show that each leads to singular key features, which therefore drives their selection as a function of the target application. The most sensitive configuration presents a limit of detection of 10-12 g/mL in laboratory settings and was successfully used ex vivo in freshly resected lung tissues.
Disciplines :
Biochemistry, biophysics & molecular biology
Physics
Author, co-author :
Loyez, Médéric  ;  Université de Mons > Faculté des Sciences > Protéomie et Microbiologie
Lobry, Maxime 
Wattiez, Ruddy  ;  Université de Mons > Faculté des Sciences > Service de Protéomie et Microbiologie
Caucheteur, Christophe ;  Université de Mons > Faculté Polytechnique > Electromagnétisme et Télécommunications
Language :
English
Title :
Optical Fiber Gratings Immunoassays
Publication date :
07 June 2019
Journal title :
Sensors
ISSN :
1424-8220
eISSN :
1424-3210
Publisher :
Multidisciplinary Digital Publishing Institute (MDPI), Switzerland
Volume :
19
Issue :
11
Pages :
2595
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S828 - Protéomie et Microbiologie
F108 - Electromagnétisme et Télécommunications
Research institute :
R100 - Institut des Biosciences
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