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Chemical Sensors based on Holey Graphene
University of Pittsburgh
posted on 01/13/2012
A new carbon based material called holey graphene was synthesized and a process for producing this material was developed.
Suggested Uses
- Selective electronic detection of hydrogen gas at parts per million (ppm) levels in ambient conditions
- Material (hRGO) can be also used for fabrication of other sensors and separation membranes
Advantages
- High sensitivity and selectivity for hydrogen gas (for the range of 40 ppm to 40000 ppm)
- Sensor operation at room temperature leading to reduced power consumption.
- No cross sensitivity with other interfering gases such as carbon monoxide and methane.
- Nanoelectric device, which can be easily integrated with available CMOS technology
Detailed Description
The material is prepared by enzymatic oxidation of graphene oxide followed by reduction using a chemical technique.
Also developed is a device, which is fabricated by dielectrophoretically depositing hRGO onto metal electrodes to form the conducting channel, followed by metal nanoparticles (such as Pt) deposition, which leads to the selective detection of hydrogen gas concentration.
Provisional Patent Application filed
Background
Graphene is a novel two-dimensional nanomaterial that holds great potential in electronic and sensor applications. By etching the edges to form nanoribbons or introducing defects on the basal plane, it has been demonstrated that the physical and chemical properties of graphene can be drastically altered. However, the lithographic or chemical techniques required to reliably produce such nanoribbons remain challenging.
File Number: 2390
Web site: http://www.pitt.edu/~astar/
This innovation currently is not available for online licensing. Please contact Harold Swift at University of Pittsburgh for more information.
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