Multi-pin chemiresistors for microchemical sensors

Ho, Clifford K

Title: Multi-pin chemiresistors for microchemical sensors

Abstract

A multi-pin chemiresistor for use in microchemical sensors. A pair of free-standing, bare wires is supported by an electrically insulating support, and are oriented parallel to each other and spaced closely together. A free-standing film of a chemically sensitive polymer that swells when exposed to vapors of a volatile chemical is formed in-between the pair of closely-spaced wires by capillary action. Similar in construction to a thermocouple, this "chemicouple" is relatively inexpensive and easy to fabricate by dipping the pair of bare wires into a bath of well-mixed chemiresistor ink. Also, a chemiresistor "stick" is formed by dipping an electrically insulating rod with two or more linear or spiral-wrapped electrical traces into the bath of well-mixed chemiresistor ink, which deposits a uniform coating of the chemically sensitive polymer on the rod and the electrical traces. These "sticks" can be easily removed and replaced from a multi-chemiresistor plug.

Inventors:

Ho, Clifford K ^[1]

Albuquerque, NM

Issue Date:: 2007-02-20

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 902701

Patent Number(s):: 7179421

Application Number:: 10/349,689

Assignee:: Sandia Corporation (Albuquerque, NH)

Patent Classifications (CPCs):: Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

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Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T436/212 - Aromatic
Y10T436/218 - Total hydrocarbon, flammability, combustibility [e.g., air-fuel mixture, etc.]
Y10T436/21 - Hydrocarbon
Y10T436/11 - Automated chemical analysis
Y10T436/214 - Acyclic [e.g., methane, octane, isoparaffin, etc.]

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N27/126 - {comprising organic polymers}

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DOE Contract Number:: AC04-94AL85000

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION

Citation Formats


                    Ho, Clifford K. Multi-pin chemiresistors for microchemical sensors.  United States: N. p., 2007. 
        Web.

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                    Ho, Clifford K. Multi-pin chemiresistors for microchemical sensors.  United States.

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                    Ho, Clifford K. Tue .  
        "Multi-pin chemiresistors for microchemical sensors".  United States.  https://www.osti.gov/servlets/purl/902701.

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@article{osti_902701,

  title        = {Multi-pin chemiresistors for microchemical sensors},

  author       = {Ho, Clifford K},

  abstractNote = {A multi-pin chemiresistor for use in microchemical sensors. A pair of free-standing, bare wires is supported by an electrically insulating support, and are oriented parallel to each other and spaced closely together. A free-standing film of a chemically sensitive polymer that swells when exposed to vapors of a volatile chemical is formed in-between the pair of closely-spaced wires by capillary action. Similar in construction to a thermocouple, this "chemicouple" is relatively inexpensive and easy to fabricate by dipping the pair of bare wires into a bath of well-mixed chemiresistor ink. Also, a chemiresistor "stick" is formed by dipping an electrically insulating rod with two or more linear or spiral-wrapped electrical traces into the bath of well-mixed chemiresistor ink, which deposits a uniform coating of the chemically sensitive polymer on the rod and the electrical traces. These "sticks" can be easily removed and replaced from a multi-chemiresistor plug.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2007},

  month        = {2}

}

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Works referenced in this record:

In-Situ Chemiresistor Sensor Package for Real-Time Detection of Volatile Organic Compounds in Soil and Groundwater
journal, January 2002

Ho, Clifford; Hughes, Robert
Sensors, Vol. 2, Issue 1
https://doi.org/10.3390/s20100023

Integrated chemiresistor array for small sensor platforms
conference, August 2000

Hughes, Robert C.; Casalnuovo, Stephen A.; Wessendorf, Kurt O.
AeroSense 2000, SPIE Proceedings
https://doi.org/10.1117/12.396280

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Title: Multi-pin chemiresistors for microchemical sensors

Abstract

Citation Formats

In-Situ Chemiresistor Sensor Package for Real-Time Detection of Volatile Organic Compounds in Soil and Groundwater journal, January 2002

Integrated chemiresistor array for small sensor platforms conference, August 2000

In-Situ Chemiresistor Sensor Package for Real-Time Detection of Volatile Organic Compounds in Soil and Groundwater
journal, January 2002

Integrated chemiresistor array for small sensor platforms
conference, August 2000