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Room Temperature Detection of Formaldehyde with Economical and Ecofriendly Graphene Quantum Dot Ink Treated Paper-Based Sensor

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Advances in Medical Physics and Healthcare Engineering

Part of the book series: Lecture Notes in Bioengineering ((LNBE))

Abstract

Renewed interest for volatile organic compound (VOC) sensors using nanomaterials are increasing due to several limitations of existing commercially available sensors for healthcare, food quality, and environmental applications. A disposable, flexible, and room temperature, paper-based formaldehyde sensor has been developed using graphene quantum dot ink as the sensing material. The PEDOT:PSS conductive ink acts as an electrode on the porous paper substrate with graphene quantum dot ink as sensing material making the device novel, low cost, and potential candidate for large area roll to roll solution process-able formaldehyde sensors fabrication. The sensitivity is measured for a concentration varying from 7 to 20 ppm exposure of formaldehyde at ambient temperature at dry air condition. The sensor device shows a sensitivity of 0.26% at 15 ppm HCHO. The p-type GQDs reveal a resistance increment of the sensing film in presence of reducing gas HCHO, which is explained using charge transfer dynamics between sensing film and HCHO molecules. The finding may lead to new opportunities in flexible formaldehyde sensors operating at room temperature for healthcare applications.

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Authors and Affiliations

  1. School of Nano Science and Technology, Indian Institute of Technology, Kharagpur, India

    Shreyasi Das, Poulomi Chakrabarty & Tamal Dey

  2. Department of Physics, Indian Institute of Technology, Kharagpur, India

    Sumita Santra & Samit K. Ray

  3. School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, India

    Soumen Das

  4. S. N. Bose National Centre for Basic Sciences, Kolkata, India

    Samit K. Ray

Authors
  1. Shreyasi Das
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  2. Poulomi Chakrabarty
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  3. Tamal Dey
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  4. Sumita Santra
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  5. Soumen Das
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  6. Samit K. Ray
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Corresponding author

Correspondence to Samit K. Ray .

Editor information

Editors and Affiliations

  1. Adamas University, Kolkata, India

    Moumita Mukherjee

  2. Kalyani University, Kolkata, India

    J.K. Mandal

  3. Christ University, Bengaluru, India

    Siddhartha Bhattacharyya

  4. University Innsbruck, Innsbruck, Tirol, Austria

    Christian Huck

  5. Adamas University, Kolkata, India

    Satarupa Biswas

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Das, S., Chakrabarty, P., Dey, T., Santra, S., Das, S., Ray, S.K. (2021). Room Temperature Detection of Formaldehyde with Economical and Ecofriendly Graphene Quantum Dot Ink Treated Paper-Based Sensor. In: Mukherjee, M., Mandal, J., Bhattacharyya, S., Huck, C., Biswas, S. (eds) Advances in Medical Physics and Healthcare Engineering. Lecture Notes in Bioengineering. Springer, Singapore. https://doi.org/10.1007/978-981-33-6915-3_28

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