Papers – Page 570 – TechConnect Briefs

Instantaneous Microbial Detection Demonstrated for Air & Water

Jiang J.P., McGill S., Morris S., BioVigilant Systems, Inc., US

Traditionally, growth based techniques have been the standard in environmental monitoring for evaluating the quality and quantity of microbial content. However, many studies have underscored the inadequacy of these techniques: (1) to provide environmental microbial [...]

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 [...]

Bacterial Concentration Detection with Dielectrophoresis and Capacitive Measurement

Yoo J-H, Cha M.S., Lee J., Seoul National University, KR

The concentration of Escherichia coli (E.coli) cells in water was detected by depositing them on an array of electrodes using dielectrophoresis (DEP). Electrowetting was used to effectively concentrate the E.coli in a droplet of water [...]

Polysilicon Nano-wires Based Nano-device on Silicon Chip: Fabrication and its Application

Mishra N.N., Winterrowd P., Nelson R., Maki G., Maki W.C., Rastogi S.K., Cameron E., Filanoski B., Maki G., Maki W.C., University of Idaho, US

5x5 arrays of six nano-transistor devices were fabricated on p-type silicon/silicon oxide (200nm) wafers with resistivity 1-100 -cm. 50nm of doped polysilicon were deposited and annealed to make nanowires. All nanowires were made with direct [...]

Anodic aluminum oxide-based capacitive humidity sensor integrated with micro-heater

Kim Y.D., Jung B.B., Lee H.K., Lee K.H., Lee H.K., Lee K.H., Park H.C., Pohang University of Science and Technology, KR

AAO(Anodic Aluminum Oxide) film is fabricated as a sensing material of capacitive humidity sensors. Because AAO films have a lot of nano-size pores, many water vapors can be absorbed. The size of a pore diameter [...]

Polymer nanocomposite based chemiresistive gas sensors

Meka D.A., George L.A., Prasad S., Portland State University, US

We present here the development of a polymer nanocomposite based gas sensor for detecting trace gas emissions in ambient environment. This project is aimed to build a chemiresistive gas sensor with excellent sensitivity and improved [...]

Two-nozzle flame synthesis of Pt/Ba/Al2O3 for NOx storage

Büchel R., Strobel R., Pratsinis S.E., Baiker A., ETH Zürich, CH

A novel two-nozzle flame spray pyrolysis (FSP) process is presented for one-step preparation of Pt/Ba/Al2O3 particles for NOx storage-reduction (NSR) catalysts. These storage catalysts are of particular interest for mobile engines operating under lean conditions [...]

Characterization of Different Surfaces Morphology in Heterogeneous Catalyst

Mukherjee R., Palazoglu A., Romagnolia J.A., Louisiana State University, US

Structures and property of surface are very important in different chemical, physical and biological process. The interaction between the reactant molecules (adsorbate) and the surface are important in the performance of the catalyst. Surface with [...]

Carbon Nanotube Interfaces for Single Molecular Level Bio Sensing

Choi W.B., Vedala H., Roy S., Kim T-H., Florida International University, US

Single molecule detection, aimed both at fundamental investigation and applications, has recently been attracting a lot of attentions. The present set of studies is focused on the design, fabrication and optimization of novel carbon nanotube(CNT) [...]

Silane-based water repellent and easy-to-clean surfaces for concrete structure improvement

Kargol M.A., Danish Technological Institute, DK

In addition to its civil engineering properties, concrete also has an architectural and aesthetic function. When the concrete structure ages, the visible appearance of the surface gradually changes as it is exposed to the environment, [...]