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Search Publications by: Steve Semancik (Fed)

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Displaying 51 - 75 of 213

Methods for Optimizing and Extending the Performance of Chemiresistive Gas Microsensors

November 3, 2013
Author(s)
Kurt D. Benkstein, Alexander (. Vergara Tinoco, Christopher B. Montgomery, Baranidharan Raman, Stephen Semancik
This paper briefly describes varied concepts developed and implemented to enhance the performance of gas-phase chemical microsensors. The developments are illustrated for chemiresistive (MEMS) microdevices, and involve efficient, array-based approaches to

Fluctuation Enhanced Sensing (FES) with a Nanostructured Semiconducting Metal Oxide Film for Gas Detection and Classification

October 31, 2013
Author(s)
Bulent Ayhan, Chiman Kwan, Jin Zhou, Laszlo Kish, Kurt D. Benkstein, Phillip H. Rogers, Stephen Semancik
The feasibility of fluctuation-enhanced sensing (FES) for the detection and classification of different gases by using a single microsensor has been experimentally demonstrated. A nanostructured semiconducting metal oxide film has been used as a

Multi-resonant plasmonic nanodome arrays for label-free biosensing applications

July 10, 2013
Author(s)
Charles J. Choi, Stephen Semancik
The characteristics and utility of plasmonic nanodome arrays capable of supporting multiple resonance modes are described. A low-cost, large-area replica molding process is used to produce, on flexible plastic substrates, two-dimensional periodic arrays of

MICROHOTPLATE TEMPERATURE SENSOR CALIBRATION AND BIST

January 3, 2012
Author(s)
Muhammad Y. Afridi, Christopher B. Montgomery, Stephen Semancik, Kenneth G. Kreider, Jon C. Geist
In this paper we describe a novel long-term microhotplate temperature sensor calibration technique suitable for Built-In Self Test (BIST). The microhotplate thermal resistance (thermal efficiency) and the thermal voltage from an integrated platinum-rhodium

Microsensors in Dynamic Backgrounds: Toward Real-Time Breath Monitoring

January 15, 2010
Author(s)
Kurt D. Benkstein, Baranidharan Raman, Christopher B. Montgomery, C Martinez, Stephen Semancik
We evaluated MEMS microsensor array with chemi-resistive elements for use as a non-invasive clinical diagnostic tool to detect the presence or absence of trace amounts of disease biomarkers in simulated breath samples. The microsensor environment was

Analog BIST Functionality for Microhotplate Temperature Sensors

September 1, 2009
Author(s)
Muhammad Y. Afridi, Christopher B. Montgomery, Elliott cooper-Balis, Stephen Semancik, Kenneth G. Kreider, Jon C. Geist
In this paper we describe a novel microhotplate temperature sensor calibration technique suitable for Built-In Self Test. The technique only requires short-term temperature stability from the four-wire polysilicon heater/temperature sensors that are

Generating and Using Data of Higher Dimension for Gas-Phase Chemical Sensing

May 29, 2009
Author(s)
Baranidharan Raman, Joshua L. Hertz, Kurt D. Benkstein, Douglas C. Meier, Casey Mungle, Stephen Semancik
Methods to acquire and analyze rich data streams from sensors are helpful, if not required, to track chemical components within complex gas-phase environments. We describe a MEMS-based microsensor technology that populates multi-element arrays with

CMOS Microhotplate Technology for Chemical and Biological Agent Detection

March 16, 2009
Author(s)
Muhammad Y. Afridi, Christopher B. Montgomery, Elliott cooper-Balis, Stephen Semancik, Jon C. Geist, Alim A. Fatah
In this paper we describe microhotplates that can serve as platforms for gas sensors of potential use for homeland security and other gas sensing applications. A brief review of the fabrication of microhotplate precursors in a CMOS-compatible technology

A Method for Fabricating Conductometric Gas Sensors of Metal Oxide Nanotubes Formed in Porous Aluminum Oxide Membranes

February 2, 2009
Author(s)
Reit Artzi-Gerlitz, Kurt D. Benkstein, David L. Lahr, Joshua L. Hertz, Christopher B. Montgomery, John E. Bonevich, Stephen Semancik, Michael J. Tarlov
We describe a general, simple strategy for fabricating conductometric gas sensors from metal oxide nanotubes formed in nanoporous aluminum oxide membranes. In this approach, the aluminum oxide membrane serves as both a template for growth of the sensing