PubMed Health⌕ Search

Biomedical subjects

Fernando J Fonseca

Publications and source records attributed to Fernando J Fonseca.

2 recordsLinked to original sources
PubMed2003

High-performance taste sensor made from Langmuir-Blodgett films of conducting polymers and a ruthenium complex.

A sensor array made up of nanostructured Langmuir-Blodgett (LB) films is used as an electronic tongue capable of identifying sucrose, quinine, NaCl, and HCl at the parts-per-billion (ppb) level, being in some cases 3 orders of magnitude below the human threshold. The sensing units comprise LB films from conducting polymers and a ruthenium complex transferred onto gold interdigitated electrodes. Impedance spectroscopy is used as the principle of detection, and the importance of using nanostructured films is confirmed by comparing results from LB films with those obtained from cast films.

Journal Article↗
PubMed2003

Nano-assembled films for taste sensor application.

An artificial taste sensor based on different types of ultra-thin films of conducting polymers (a special class of plastics that can conduct electricity) and their mixture with a lipid-like material has been able to mimic the human palate. In addition, this "electronic tongue" has been successfully employed in the analysis of tastants, suppression effects, and commercial beverages throughout AC measurements (impedance spectroscopy) in a relatively low-cost, simple, and efficient way.

Aniline Compounds↗