title: Selective vancomycin detection using optical fibre long period gratings functionalised with molecularly imprinted polymer nanoparticles.
abstract: An optical fibre long period grating (LPG) sensor modified with molecularly imprinted polymer nanoparticles (nanoMIPs) for the specific detection of antibiotics is presented. The operation of the sensor is based on the measurement of changes in refractive index induced by the interaction of nanoMIPs deposited onto the cladding of the LPG with free vancomycin (VA). The binding of nanoMIPs to vancomycin was characterised by a binding constant of 4.3 ± 0.1 × 10(-8) M. The lowest concentration of analyte measured by the fibre sensor was 10 nM. In addition, the sensor exhibited selectivity, as much smaller responses were obtained for high concentrations (∼700 μM) of other commonly prescribed antibiotics such as amoxicillin, bleomycin and gentamicin. In addition, the response of the sensor was characterised in a complex matrix, porcine plasma, spiked with 10 μM of VA.
authors.affiliation: Department of Engineering Photonics, School of Engineering, Cranfield University, Cranfield, Bedfordshire MK43 0AL, UK. s.korposh@cranfield.ac.uk.
authors.forename: Sergiy
authors.initials: S
authors.lastname: Korposh
authors.forename: Iva
authors.initials: I
authors.lastname: Chianella
authors.forename: Antonio
authors.initials: A
authors.lastname: Guerreiro
authors.forename: Sarah
authors.initials: S
authors.lastname: Caygill
authors.forename: Sergey
authors.initials: S
authors.lastname: Piletsky
authors.forename: Stephen W
authors.initials: SW
authors.lastname: James
authors.forename: Ralph P
authors.initials: RP
authors.lastname: Tatam
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000032:analysis* / Q000097:blood; D057230:Limit of Detection; D054802:Molecular Imprinting; D053758:Nanoparticles; D011108:Polymers / Q000737:chemistry*; D013552:Swine; D014640:Vancomycin / Q000032:analysis* / Q000097:blood
chemical_list: D000900:Anti-Bacterial Agents; D011108:Polymers; D014640:Vancomycin