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Nanomaterials 2018, 8(2), 123;

Printed Graphene Derivative Circuits as Passive Electrical Filters

Department of Mechanical and Materials Engineering, The University of Western Ontario, London, ON N6A 5B9, Canada
Author to whom correspondence should be addressed.
Received: 14 January 2018 / Revised: 15 February 2018 / Accepted: 16 February 2018 / Published: 23 February 2018
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The objective of this study is to inkjet print resistor-capacitor (RC) low pass electrical filters, using a novel water-based cellulose graphene ink, and compare the voltage-frequency and transient behavior to equivalent circuits constructed from discrete passive components. The synthesized non-toxic graphene-carboxymethyl cellulose (G-CMC) ink is deposited on mechanically flexible polyimide substrates using a customized printer that dispenses functionalized aqueous solutions. The design of the printed first-order and second-order low-pass RC filters incorporate resistive traces and interdigitated capacitors. Low pass filter characteristics, such as time constant, cut-off frequency and roll-off rate, are determined for comparative analysis. Experiments demonstrate that for low frequency applications (<100 kHz) the printed graphene derivative circuits performed as well as the circuits constructed from discrete resistors and capacitors for both low pass filter and RC integrator applications. The impact of mechanical stress due to bending on the electrical performance of the flexible printed circuits is also investigated. View Full-Text
Keywords: inkjet printing; graphene; carboxymethyl cellulose; RC low pass filters; flexible electronics inkjet printing; graphene; carboxymethyl cellulose; RC low pass filters; flexible electronics

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Sinar, D.; Knopf, G.K. Printed Graphene Derivative Circuits as Passive Electrical Filters. Nanomaterials 2018, 8, 123.

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