Chemical, Physical & Bio-Sensors – Page 26

Using Surface Plasmon Propagation through Nanostructures for Chemical and Biological Sensing

By taking advantage of the properties of the propagation of surface plasmon waves through nanostructures, we developed a new chemical and biological sensor. Compared to traditional Surface Plasmon Resonance (SPR) sensing, our sensor does not [...]

Integrated Techniques for Transmembrane Protein Sensing

Wilk S.J., Petrossian L., Goryll M., Thornton T.J., Goodnick S.M., Tang J.M., Eisenberg R.S., Arizona State University, US

We present a method for the microfabrication of apertures in a silicon substrate using well-known cleanroom technologies and a novel approach using phase sensitive detection to measure single channels of transmembrane proteins. These proteins are [...]

Multi-plex biomolecular detection using Bio-nanotransduction

Branen J.R., University of Idaho, US

Bio-nanotransduction is a biological detection scheme that is based on biological recognition (Bio) and the production of biological nano-signals which allows the change of recognition event into universal signal molecules (nanotransduction). A single sample can [...]

Detection of Biological Species by Surface Enhanced Raman Scattering

Sengupta A., Volny M., Wilson C.B., Turecek F., Davis E.J., University of Washington, US

The rationale behind this work is to explore the application of surface-enhanced Raman scattering (SERS) to detect and identify biological species, especially some common pathogens that are involved in food poisoning and water contamination. SERS [...]

Future of Semiconductor Based Thermal Neutron Detectors

Nikolic R.J., Cheung C-L, Reinhardt C.E., Wang T.F., Lawrence Livermore National Lab., US

Thermal neutron detectors have seen only incremental improvements over the last decades. In this paper we overview the current technology of choice for thermal neutron detection – 3He tubes, which suffer from, moderate to poor [...]

Dendrimer Nanoparticles for Extending Biosensor Lifetime

Qian X., Tabacco M.B., Smiths Detection, US

Smiths Detection has been developing semi-selective optical biosensors for the direct airborne detection of the four primary classes of biological warfare agent: bacteria, bacterial spores, toxins and viruses. The sensors have good sensitivity and selectivity. [...]

Bio Sensors and Diagnostics

A Fiber-Optic Biosensor Based on Monooxygenases and Sol–Gel Entrapped Fluoresceinamine for Trichloroethene and Tetrachloroethene

Ryoo D., Kim Y., Jeun K., Wood T., Choi Y., Jeonju Univ., KR

Tetrachloroethene (a.k.a. perchloroethene, PCE) and trichloroethene (TCE) are the most frequently detected groundwater contaminants which are suspected to cause cancer in humans. Monitoring of these carcinogens suffers from high costs and inaccuracy caused by cumbersome [...]

Piezoelectric Microcantilevers of Nanoscale Thickness for Detection of Cells

Modi N., Lacy F., Southern University and A&M College, US

This research project explores the employment of piezoelectric material as the sensing element in microcantilever beams fabricated to function as resonant mass sensors. The cantilever beam would be a very thin double-bridged structure (50 nm) [...]

Whole Cell Biosensors For (Eco)Toxicity Screening: Alternatives For The Future

Robbens J., Maras M., Laureyn W., De Coen W., University Antwerp, BE

As a response to the emerging environmental threats, the European Parliament introduced tough new rules for the testing and approval of thousands of chemicals. Questions are raised towards the practicality of the new legislation as [...]