PDMS Flow Sensors With Graphene Piezoresistors Using 3D Printing and Soft Lithography

Amar M Kamat*, Bayu Jayawardhana, Ajay Giri Prakash Kottapalli

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

1 Citaat (Scopus)
3 Downloads (Pure)


This paper reports the fabrication and characterization of a flexible piezoresistive flow sensor comprising a polydimethylsiloxane (PDMS) cantilever with a serpentine graphene nanoplatelets (GNP) strain gauge embedded at the cantilever base. A facile and cleanroom-free processing work flow involving a combination of high-resolution powder bed fusion and soft lithography was used to fabricate PDMS cantilevers (aspect ratio 20) with 150 µm × 150 µm microchannels on its surface. A high gauge factor of 55 (up to 5 times higher than reported in comparable piezoresistive flow sensors) was achieved using drop-casted GNP ink as the piezoresistive sensing element in the aforementioned microchannels. Finally, the use of the PDMS-graphene cantilever as an airflow sensor with enhanced sensitivity (20 times more than comparable piezoresistive cantilever sensors), low hysteresis, good repeatability, and bidirectional sensing capability was demonstrated.
Originele taal-2English
Titel2020 IEEE SENSORS Proceedings
Aantal pagina's4
ISBN van elektronische versie978-1-7281-6801-2
ISBN van geprinte versie978-1-7281-6802-9
StatusPublished - 2020
EvenementIEEE Sensors 2020: Virtual Conference - Online, Rotterdam, Netherlands
Duur: 25-okt-202028-okt-2020


ConferenceIEEE Sensors 2020
Internet adres

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