Microfabrication of passive electronic components with printed graphene-oxide deposition

  1. Get@NRC: Microfabrication of passive electronic components with printed graphene-oxide deposition (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1117/12.2038411
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Proceedings titleSPIE - International Society for Optical Engineering. Proceedings
ConferenceMicromachining and Microfabrication Process Technology XIX, 4 February 2014 through 6 February 2014, San Francisco, CA
Article number89730H
SubjectCapacitive sensors; Composite micromechanics; Elastic moduli; Flexible electronics; Fracture toughness; Ink; Microanalysis; Microelectrodes; Microfabrication; Micromachining; Printing; Technology; Drop-on-demand printing; Electrical conductivity; Electrically conductive; Electrically conductive inks; Environmental Monitoring; Femtosecond pulsed laser; Passive electronic components; Thermal reduction; Graphene
AbstractFlexible electronic circuitry is an emerging technology that will significantly impact the future of healthcare and medicine, food safety inspection, environmental monitoring, and public security. Recent advances in drop-on-demand printing technology and electrically conductive inks have enabled simple electronic circuits to be fabricated on mechanically flexible polymers, paper, and bioresorbable silk. Research has shown that graphene, and its derivative formulations, can be used to create low-cost electrically conductive inks. Graphene is a one atom thick two-dimensional layer composed of carbon atoms arranged in a hexagonal lattice forming a material with very high fracture strength, high Young's Modulus, and low electrical resistance. Non-conductive graphene-oxide (GO) inks can also be synthesized from inexpensive graphite powders. Once deposited on the flexible substrate the electrical conductivity of the printed GO microcircuit traces can be restored through thermal reduction. In this paper, a femtosecond laser with a wavelength of 775nm and pulse width of 120fs is used to transform the non-conductive printed GO film into electrically conductive oxygen reduced graphene-oxide (rGO) passive electronic components by the process of laser assisted thermal reduction. The heat affected zone produced during the process was minimized because of the femtosecond pulsed laser. The degree of conductivity exhibited by the microstructure is directly related to the laser power level and exposure time. Although rGO films have higher resistances than pristine graphene, the ability to inkjet print capacitive elements and modify local resistive properties provides for a new method of fabricating sensor microcircuits on a variety of substrate surfaces. © 2014 SPIE.
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AffiliationNational Research Council Canada (NRC-CNRC); Automotive (AUTO-AUTO)
Peer reviewedYes
NPARC number21272284
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Record identifier65fc6547-99df-4980-8b34-0ab14d180757
Record created2014-07-23
Record modified2017-04-24
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