Integrated optical pH sensor using replicated chirped grating coupler sensor chips
| Autor: | J. Dübendorfer, Rino E. Kunz, G. Jobst, Gerald Urban, Isabella Moser |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
chemistry.chemical_classification
Materials science business.industry Metals and Alloys Waveguide sensor Polymer Grating Ph measurement Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Membrane chemistry visual_art Materials Chemistry visual_art.visual_art_medium Optoelectronics Electrical and Electronic Engineering Polycarbonate business Instrumentation Refractometry Sensitivity (electronics) |
| Zdroj: | Sensors and Actuators B: Chemical. 50:210-219 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/s0925-4005(98)00238-x |
| Popis: | Integrated optical sensor chips suitable for high-resolution pH measurements are presented. The pH-sensitive swelling of a polymer membrane is detected by refractometry using a compact multi-channel sensor module. The signal transduction is achieved by means of chirped grating couplers which allow simple yet high functionality sensor modules to be built. The experiments have been performed with high sensitivity replicated polycarbonate TiO2 waveguide sensor chips coated with an ultrathin photopatterned hydrogel membrane having functional groups which reversibly change from the neutral state to a charged state upon acidification. A resolution δpH |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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