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Conductive Inks Based on Melamine Intercalated Graphene Nanosheets for Inkjet Printed Flexible Electronics

Kralj, Magdalena; Krivačić, Sara; Ivanišević, Irena; Zubak, Marko; Supina, Antonio; Marciuš, Marijan; Halasz, Ivan; Kassal, Petar (2022) Conductive Inks Based on Melamine Intercalated Graphene Nanosheets for Inkjet Printed Flexible Electronics. Nanomaterials, 12 (17). ISSN 2079-4991

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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.

Item Type: Article
Uncontrolled Keywords: mechanochemistry; graphene nanosheets; conductive ink; inkjet printing; printed electronics
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Division of Materials Chemistry
Division of Physical Chemistry
Project titleProject leaderProject codeProject type
Fotonsko sinteriranje inkjet ispisanih elektrokemijskih senzora i biosenzora na plastičnim podlogama-PrintEChemSensPetar KassalUIP-2020-02-9139HRZZ
Novi materijali za pohranu energije-NEWMATENGIvan HalaszPKP-2016-06-4480HRZZ
Depositing User: Diana Mikoč Radešić
Date Deposited: 31 Jan 2024 12:11
DOI: 10.3390/nano12172936

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