Perena Gouma

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The detection and monitoring of gases in exhaled human breath up to date has been limited by the lack of appropriate materials and technologies which could rapidly and selectively identify the presence and monitor the concentration of trace levels of specific analytes-biomarkers. We present a metal oxide-based nanosensor that is highly specific to ammonia(More)
Nanosensor Device for Breath Acetone Detection L. Wang1, K. Kalyanasundaram2, M. Stanacevic3, and P. Gouma4 ∗ 1Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC V6T1Z4, Canada 2Sensitron Semiconductor, Deer Park, NY 11729, USA 3Department of Electrical and Computer Engineering, SUNY Stony Brook, Stony(More)
This introductory article describes the content of the October 2004 issue of MRS Bulletin focusing on novel materials and applications of electronic noses and tongues. The articles in this issue review the state of the art in materials, devices, and data processing algorithms used in electronic olfaction and taste systems. The most common gas- and(More)
In the present contribution, three methods for the preparation of nanoscaledSrTi1-xFexO3-δ sensor films for hydrocarbon sensing were investigated. Besides screen-printed thick films based on sol-precipitated nanopowders, two novel synthesis methods,electrospinning and electrospraying, were tested successfully. All of these sensor devicesshowed improved(More)
A portable binary breath analyzer prototype for detection of specific metabolites in breath like nitric oxide, ammonia and isoprene is designed. A binary response implemented with LED display is employed for the prototype. Highly selective NO sensors were fabricated by using modified pervskite based WO3. Experiments demonstrated that the designed prototype(More)
We present a low-power wide-dynamic-range readout circuit that directly interfaces a selective metal-oxide gas sensor. The proposed novel readout architecture implements an adaptive baseline compensation and limits the sensor current. The readout IC can interface the sensors with the baseline resistance from 1 kΩ to 100 MΩ and measures the gas induced(More)
In most countries, health authorities recommend a 20 % reduction of the salt content in manufactured food products. Understanding the release of taste compounds from food is essential to better known the mechanism of flavour perception, in order to develop low salt products that are acceptable to the consumers. In this aim, two sensors have been designed to(More)
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