Conductive inks based on melamine intercalated graphene nanosheets for inkjet printed flexible electronics (CROSBI ID 314462)
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Podaci o odgovornosti
Kralj, Magdalena ; Krivačić, Sara ; Ivanišević, Irena ; Zubak, Marko ; Supina, Antonio ; Marciuš, Marijan ; Halasz, Ivan ; Kassal, Petar
engleski
Conductive inks based on melamine intercalated graphene nanosheets for inkjet printed flexible electronics
Abstract: With the growing number of flexible electronics applications, environmentally benign ways of mass-producing graphene electronics are sought. In this study, we present a scalable mechanochemical route for the exfoliation of graphite in a planetary ball mill with melamine to form melamine-intercalated graphene nanosheets (M- GNS). M-GNS morphology was evaluated, revealing small particles, down to 14 nm in diameter and 0.4 nm thick. The M-GNS were used as a functional material in the formulation of an inkjet-printable conductive ink, based on green solvents: water, ethanol, and ethylene glycol. The ink satisfied restrictions regarding stability and nanoparticle size ; in addition, it was successfully inkjet printed on plastic sheets. Thermal and photonic post-print processing were evaluated as a means of reducing the electrical resistance of the printed features. Minimal sheet resistance values (5 kΩ/sq for 10 printed layers and 626 Ω/sq for 20 printed layers) were obtained on polyimide sheets, after thermal annealing for 1 h at 400 °C and a subsequent single intense pulsed light flash. Lastly, a proof-of-concept simple flexible printed circuit consisting of a battery-powered LED was realized. The demonstrated approach presents an environmentally friendly alternative to mass- producing graphene-based printed flexible electronics.
mechanochemistry ; graphene nanosheets ; conductive ink ; inkjet printing ; printed electronics
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