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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/5916

Title: Novel U-bent fiber optic probe for localized surface plasmon resonance based biosensor
Authors: SAI, VVR
KUNDU, T
MUKHERJI, S
Keywords: field absorption sensor
noble-metal nanoparticles
colloid monolayers
gold nanoparticles
shaped probe
spectroscopy
glass
sensitivity
particles
single
Issue Date: 2009
Publisher: ELSEVIER ADVANCED TECHNOLOGY
Citation: BIOSENSORS & BIOELECTRONICS, 24(9), 2804-2809
Abstract: The aim of this study is to develop an optical absorbance based biosensor suitable for wide scale use in resource-poor locales. A sensor for sensitive measurement of refractive index (RI) with the help of optical absorbance properties of gold nanoparticles (GNP) coupled to an efficient optical transducer in the form of a U-bent fiber optic probe is described. A U-bent probe was fabricated by a simple procedure. The absorbance due to the localized surface plasmon resonance (LSPR) of fiber-bound GNP was found to be linear to refractive index changes between 1.33 and 1.35. A U-bent probe of 200 mu m diameter with a bend radius of 0.75 mm gave rise to a sensitivity of 35 Delta A/RIU at 540 nm. The resolution of the sensor probe was 3.8 x 10(-5) RIU. Label-free biosensing was demonstrated using these probes with the help of IgG-anti IgG as bioreceptor-analyte pair. (C) 2009
URI: http://dx.doi.org/10.1016/j.bios.2009.02.007
http://dspace.library.iitb.ac.in/xmlui/handle/10054/5916
http://hdl.handle.net/10054/5916
ISSN: 0956-5663
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