An Optical Sensor for Dengue Envelope Proteins Using Polyamidoamine Dendrimer Biopolymer-Based Nanocomposite Thin Film: Enhanced Sensitivity, Selectivity, and Recovery Studies

Enhanced Photocatalysis for Water Purification and Disinfection using Optical Fibers Coated with Nanocomposite Thin Films

Enhanced Sensitivity of Gas Sensor Based on Poly(3-hexylthiophene) Thin-Film Transistors for Disease Diagnosis and Environment Monitoring

Electronic devices based on organic thin-film transistors (OTFT) have the potential to supply the demand for portable and low-cost gadgets, mainly as sensors for in situ disease diagnosis and environment monitoring. For that reason, poly(3-hexylthiophene) (P3HT) as the active layer in the widely-used bottom-gate/bottom-contact OTFT structure was deposited over highly-doped silicon substrates co...

Thin film composite optical waveguides for sensor applications: a review.

We review the design and fabrication of thin-film composite optical waveguides (OWG) with high refractive index for sensor applications. A highly sensitive optical sensor device has been developed on the basis of thin-film, composite OWG. The thin-film OWG was deposited onto the surface of a potassium-ion-exchanged (K(+)) glass OWG by sputtering or spin coating (5-9mm wide, and with tapers at b...

Enhanced absorption of thin-film photovoltaic cells using an optical cavity

We show via numerical simulations that the absorption and solar energy conversion efficiency of a thin-film photovoltaic (PV) cell can be significantly enhanced by embedding it into an optical cavity. A reflective hemi-ellipsoid with an aperture for sunlight placed over a tilted PV cell reflects unabsorbed photons back to the cell, allowing for multiple opportunities for absorption. Ray tracing...

Innovative Optical Nanocomposite Sensor for Security Systems Innovative Optical Nanocomposite Sensor for Security Systems

In this work, we propose a new concept of optical tactile pressure sensing applied to flexible gold/PDMS nanocomposite material. We develop an optical tapered fiber force sensor based on electromagnetic (EM) coupling effect. The light coming from a tapered multimode Si fiber is coupled to a PDMS-Au polymer film. The formed gold nanoparticles increase the effective refractive index of the PDMS a...