Label-free biosensor based on long period grating (Contributo in atti di convegno)

Type
Label
  • Label-free biosensor based on long period grating (Contributo in atti di convegno) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1117/12.2007399 (literal)
Alternative label
  • Baldini, Francesco; Chiavaioli, Francesco; Giannetti, Ambra; Brenci, Massimo; Trono, Cosimo (2013)
    Label-free biosensor based on long period grating
    in Advanced Biomedical and Clinical Diagnostic Systems XI
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Baldini, Francesco; Chiavaioli, Francesco; Giannetti, Ambra; Brenci, Massimo; Trono, Cosimo (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Advanced Biomedical and Clinical Diagnostic Systems XI (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 8572 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana
  • 8572 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • IFAC CNR (literal)
Titolo
  • Label-free biosensor based on long period grating (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
  • Anita Mahadevan-Jansen; Tuan Vo-Dinh; Warren S. Grundfest (literal)
Abstract
  • Long period gratings have been recently proposed as label-free optical devices for biochemical sensing. A biochemical interaction along the grating region changes the biolayer refractive index and a change in the fiber transmission spectrum occurs. The fiber biofunctionalization was performed with a novel chemistry using Eudragit L100 copolymer as opposed to the commonly-used silanization procedure. An IgG/anti-IgG bioassay was carried out for studying the antigen/antibody interaction. The biosensor was fully characterized, monitoring the kinetics during the antibody immobilization and achieving the calibration curve of the assay. To compare the biosensor performance, two LPG-based biosensors with distinct grating periods were characterized following the same bioassay protocol. Experimental results demonstrated an enhancement of the biosensor performance when the fundamental core mode of a single-mode fiber couples with a higher order cladding mode. Considering an LPG manufactured on a bare optical fiber, in which the coupling occurs with the 7-th cladding mode, a dynamic signal range of 0.33 nm, a working range of 1.7 -1450 mg L-1 and a LOD of 500 mu g L-1 were achieved (literal)
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