Characterization of surface heat convection of bilayer graphene

This paper studies the surface heat convection of a bilayer graphene and the possibility of using graphene wires as a flow and temperature sensor. A bilayer graphene wire was designed and fabricated, with the length of around 53 μm and the average width of around 0.5 μm. Prior to testing, the device...

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Bibliographic Details
Main Authors: Al-Mumen, H., Fubo Rao, Lixin Dong, Wen Li
Format: Conference Proceeding
Language:English
Subjects:
Atomic measurements
Heating
Silicon
Online Access:Request full text
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Summary:This paper studies the surface heat convection of a bilayer graphene and the possibility of using graphene wires as a flow and temperature sensor. A bilayer graphene wire was designed and fabricated, with the length of around 53 μm and the average width of around 0.5 μm. Prior to testing, the device was packaged with a microfluidic chamber and capillary tubes to minimize environmental interference. Thermal inertia of the graphene wire was studied at a temperature of 70 °C and the flow sensing behavior was characterized with normalized resistance changes for different values of flow rates. Our preliminary results demonstrate a negative temperature coefficient of the bilayer graphene and a flow sensitivity of about 0.44 L/min and a resolution of about 0.07 L/min. This technique provides a strong candidate for flow sensing in the nano and micro industrial applications with large temperature detection range, reliability and low cost.
ISSN:1944-9399
1944-9380
DOI:10.1109/NANO.2012.6322100