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

Anil Yadav, Saba Mehsar Khan, Anirban Kundu, Navneet Soin, Renu Rani, James McLaughlin, Devi Shankar Misra, Kiran Hazra

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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.
Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalC- Journal of Carbon Research
Issue number2
Publication statusPublished (in print/issue) - 2 May 2019


  • bolometer
  • graphene
  • nanoscience
  • nanotechnology


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