sensor – Page 4 – TechConnect Briefs

Ink-jet printed ZnO Nanoparticle Thin Films for Sensing Applications

Hartner S., Khalil A.S.G., Ali M., Winterer M., Wiggers H., University Duisburg-Essen, DE

Stable aqueous dispersions of ZnO NPs are successfully prepared with a new polymeric stabilizer. The dispersions are stable for at least 2 months without any observable sedimentation. The zeta potential and the size of the [...]

Wireless SensorSystem with Bidirectional Communications

Husak M., Boura A., Jakovenko J., Czech Technical University in Prague, CZ

The system contains units: wireless, control, actuator, software equipment. RF wireless unit ensures wireless communication between control unit and sensors as well as wireless switch unit. The control unit controls system operation, i.e. communication transfer, [...]

Development of Surface-micromachined Binary Logic Gate for Low Frequncy Signal Processing in MEMS based Sensor Applications

Chakraborty S., Bhattacharyya T.K., Indian Institute of Technology (IIT), Kharagpur, IN

This paper presents in brief the design, analysis and fabrication of surface micro-machined cantilever based binary logic inverter and universal gate for low frequency signal processing circuits in MEMS based sensors. The paper attempts to [...]

Self Assembly of Colloidal Gold Nanoparticles on Diblock Copolymer Thin Film Templates

Adams S.M., Ragan R., University of California Irvine, US

Self-assembly of metallic nanoparticles were investigated for the development of field-enhanced chemical and biological detection devices with the capacity to achieve single-molecule level detection resulting from surface enhanced Raman scattering, associated with closely spaced noble [...]

Polarity sensitive colloidal gold nanoparticles

Amin F., Yushchenko D., Zhang F., Zulqurnain A., Parak W.J., Philipps Universität Marburg, DE

Polarity sensitive gold nanoparticles have been synthesized and their fluorescence properties have been measured. The effect of external factors such as alcohols, polyamines and detergents has been investigated.

Detecting CH4 and CO Gases Using Micro-Structural Doping Compound Oxide Films on Si-Substrates

Li Y.F., Ma S.Y., Kish L.B., Ding J.-J., Northwest Normal University, US

Fluctuation-enhanced chemical sensing with commercial gas sensors have already been studied[1-4]. Fig. 1 shows one of the typical fluctuation-enhanced signals of PdxWO3 film sensor. The gas-sensing films used in commercial gas sensors are deposited on [...]

Selective Multiterminal Sensor on Individual ZnO Nanotetrapod

Lupan O., Chow L., Chai G., Trofim V., University of Central Florida, US

Low-cost, nonpoisonous and highly sensitive and selective sensors are needed for detection of various gases in the environment. ZnO tetrapod have potential application as chemical sensors. Our current experiments have shown that ZnO tetrapod sensor [...]

Agent Reactive Modulated Optical Reflector for Hazardous Agent Detection

Kovalev A.E., Bray M.G., Mayer T.S., Werner D.H., Pennsylvania State University, US

We demonstrate a standoff passive sensor working in the near infrared range. The device uses a platform based on dielectric and metallo-dielectric layers. The sensor demonstrated a significant change in the reflection coefficient if exposed [...]

Structure-property relationships in Pd/Polycarbonate based chemical sensors

Atre S.V., Valmikanathan O.P., Meka D.B., Prasad S., Oregon Nanoscience & Microtechnologies Institute, US

The effects of nanparticle surface chemistry, size, concentration and distribution on the properties of Pd/polycarbonate nanocomposites was investigated. Interesting trends in electrical conductivity and thermal stability of the nanomposites were identified. These trends were used [...]

New Type of High Sensitive Detection of Particles Based on DeFET

Ibrahim M.F., Elsayed F., Ghallab Y.H., Badawy W., University of Calgary, CA

This research work presents a new implementation of the CMOS electric-field sensor, titled as Differential Electric Field Sensitive Field Effect Transistor (DeFET). The DeFET is successfully used in detection of small partials and it is [...]