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Fiber-optic biochemical sensing with a colloidal gold-modified long period fiber grating
- Source :
- Sensors and Actuators B: Chemical. 119:105-109
- Publication Year :
- 2006
- Publisher :
- Elsevier BV, 2006.
-
Abstract
- A novel class of fiber-optic evanescent-wave sensor, which is simple to construct and easy to use, is presented and analyzed. This fiber-optic sensor is based on the modification of the grating portion of a long-period fiber grating with self-assembled gold colloids. The transmission spectra and optical properties of gold colloids change with the different refractive index of the environment near the surface of gold colloids. The sensor response of gold colloids increases linearly with solvents of increasing refractive index. When the colloidal gold surface was modified with a dinitrophenyl compound (DNP), experimental results show that the signal increase linearly with increasing concentration of the analyte, and the detection limit of the sensor for anti-DNP is 1.4 × 10−7 g/mL or 9.5 × 10−10 M.
- Subjects :
- Optical fiber
Materials science
genetic structures
digestive, oral, and skin physiology
Metals and Alloys
Analytical chemistry
Grating
Long-period fiber grating
Condensed Matter Physics
complex mixtures
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
law.invention
Colloid
law
Colloidal gold
Materials Chemistry
Electrical and Electronic Engineering
Surface plasmon resonance
Instrumentation
Biosensor
Refractive index
Subjects
Details
- ISSN :
- 09254005
- Volume :
- 119
- Database :
- OpenAIRE
- Journal :
- Sensors and Actuators B: Chemical
- Accession number :
- edsair.doi...........b69202aaae9beeff16df2140a42011ea