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Vertically Aligned Few-Layered Graphene-Based Non-Cryogenic Bolometer

Department of Physics, Indian Institute of Technology Bombay, Mumbai 400076, India
Department of Physics, Ch. Charan Singh University Meerut, Meerut 250004, India
Institute of Nano Science and Technology, Habitat Centre, Phase 10, Mohali, Punjab 160062, India
Nanotechnology and Integrated Bio-Engineering Centre, School of Engineering, University of Ulster, Jordanstown, Newtownabbey, Northern Ireland BT37 0QB, UK
Author to whom correspondence should be addressed.
Received: 5 April 2019 / Revised: 25 April 2019 / Accepted: 26 April 2019 / Published: 2 May 2019
(This article belongs to the Special Issue Carbon Nanomaterials for Energy Conversion and Storage Technologies)
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In this study, we report the photoresponse of vertically aligned few-layered graphene (VAG) upon infra-red (IR) irradiation at room temperature. Four probe measurements showed the current–voltage (I–V) characteristic of electrical switching during pulsed IR irradiation. The photoresponse reported here for VAG was significantly higher than that reported for carbon nanotube (CNT) samples. Our investigation shows that such a photoresponse arose solely from the bolometric effect, where the conductivity changed with temperature. The resistance magnitude of the VAGs increased ~two fold for each 6 °C increase in temperature. Also, the Thermal Coefficient of Resistance (TCR) in this region was ~11%/K, which is the highest TCR value reported for any carbon nanomaterial.
Keywords: nanoscience; nanotechnology; graphene; bolometer nanoscience; nanotechnology; graphene; bolometer
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Yadav, A.K.; Khan, S.M.; Kundu, A.; Rani, R.; Soin, N.; McLaughlin, J.; Misra, D.S.; Hazra, K.S. Vertically Aligned Few-Layered Graphene-Based Non-Cryogenic Bolometer. C 2019, 5, 23.

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