Optical Sensing and Analysis System Based on Porous Layers
نویسندگان
چکیده
Analysis concept of gaseous or liquid media using porous silicon multilayers with optical sensing is presented. The sensor consists of optical filter with λ/4 layers, fabricated by electrochemical etching in HF/ethanol. The optical system is tested with ampicillin and shows a linear dependence with increasing ampicillin concentration. For general sensing applications the influences of porosity and pore size on the optical output are investigated. Additionally, transport processes of gases and fluids in the nanostructured porous layer are investigated to optimize the sensor response time and to evaluate further specific material properties of the investigated media which are needed for analytical information.
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