Optical biochemical and chemical sensors

Semiconductor chemical and biochemical sensors

In this paper, problems related to the fabrication of semiconductor (bio)chemical sensors and microreactors, including modification of the surface of different materials (semiconductors, dielectric materials, polymers) to create a sensing membrane on the transducer’s surface and immobilise bioreceptors namely enzymes are discussed.

Optical Chemical Sensors: Design and Applications

Optical Chemical Sensors and Biosensors (incl. Materials for Sensors)

An optical sensor for aqueous 1-butylamine is presented which combines two novel techniques: A fluorescent indicator dye (the "fluoro reactand") embedded in a thin polymer layer performs a reversible chemical reaction with the analyte, causing changes in luminescence intensity. At the same time, inert phosphorescent beads dispersed within the polymer layer provide luminescence signals that act ...

Optical Slot-Waveguide Based Biochemical Sensors

Slot-waveguides allow light to be guided and strongly confined inside a nanometer-scale region of low refractive index. Thus stronger light-analyte interaction can be obtained as compared to that achievable by a conventional waveguide, in which the propagating beam is confined to the high-refractive-index core of the waveguide. In addition, slot-waveguides can be fabricated by employing CMOS co...

Design guidelines for optical resonator biochemical sensors

In this paper, we propose a design tool for dielectric optical resonator-based biochemical refractometry sensors. Analagous to the widely accepted photodetector figure-of-merit, the detectivity D*, we introduce a new sensor system figure of merit, the time-normalized sensitivity S*, to enable quantitative, cross-technology-platform comparison between resonator sensors with distinctive device de...