Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Steve Semancik (Fed)

Displaying 176 - 200 of 213

Solid State Gas Microsensors for Environmental and Industrial Monitoring

January 1, 1999

Author(s)

R M. Walton, Richard E. Cavicchi, Stephen Semancik, B Panchapakesan, Don L. DeVoe, M I. Aquino-Class, J D. Allen, John S. Suehle

We describe solid state gas microsensor array technology for real-time, low-cost environmental and industrial monitoring. The four-element, surface-micromachined arrays are designed in CMOS technology and consist of multiple platforms called microhotplates

Doping Effects and Reversibility Studies on Gas-Exposed alpha-Sexithiophene Thin Films

December 25, 1998

Author(s)

C Kendrick, Stephen Semancik

Research on the electronic applications of organic semiconductors is growing rapidly, and both polymeric and small molcule organics are being used in the fabrication of LEDs, transistors, and biological/chemical sensors. As a part of the chemical

Microhotplate-Based Gas Sensing

December 1, 1998

Author(s)

Stephen Semancik, Richard E. Cavicchi, M J. Nystrom, John S. Suehle, F DiMeo, J T. Kelliher

Optimization of Temperature Programmed Sensing for Gas Identification Using Micro-Hotplate Sensors

November 26, 1998

Author(s)

T A. Kunt, T. J. McAvoy, Richard E. Cavicchi, Stephen Semancik

Micro-hotplate chemical gas sensors, such as those being developed at the National Institute of Standards and Technology [NIST] by micromaching SI, can be operated in a temperature-pulsed mode, due to their small size and mass. In this paper, a new

Doping Effects and Reversibility Studies on Gas-Exposed (Alpha)-Sexithiophene Thin Films

September 1, 1998

Author(s)

C Kendrick, Stephen Semancik

The electronic effects produced by controlled gas exposures on [alpha]-sexithiophene thin films have been investigated using x-ray photoelectron spectroscopy (Incremental exposures of [alpha]6T to NO 2, O 2, NH 3 in N 2, and water vapor in N 2 were

Kinetically-Controlled Chemical Sensing Using Micromachined Structures

May 1, 1998

Author(s)

Stephen Semancik, Richard E. Cavicchi

Microdevices produced by machining silicon can offer a variety of control functionality on a miniature scale, 1.2 with general advantages connected to not only reduced size (less invasive), but also lower power requirements, lower cost, and reproducibility

In-Situ Conductivity Characterization of Oxide Thin Film Growth Phenomena on Microhotplates

February 11, 1998

Author(s)

F DiMeo, Richard E. Cavicchi, Stephen Semancik, John S. Suehle, N H. Tea, John A. Small, J T. Armstrong, J T. Kelliher

Time-Dependent Conductance of Pd-Dosed SnO2 (110)

January 1, 1998

Author(s)

Richard E. Cavicchi, V Sukharev, Stephen Semancik

Time-dependent phenomena related to the reaction of ultrathin films of Pd deposited on SnO2 (110) surfaces of differing oxygen content have been investigated. Conductance measurements and x-ray photoemission spectroscopy (XPS) were used to characterize