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Towards flexible and cheap printed electronics using inks of exfoliated 2D materials stabilized by cellulose
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för naturvetenskap.ORCID-id: 0000-0001-9312-3672
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för naturvetenskap.ORCID-id: 0000-0003-2873-7875
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för naturvetenskap.ORCID-id: 0000-0001-9137-3440
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för naturvetenskap.ORCID-id: 0000-0001-7329-3359
2017 (engelsk)Konferansepaper, Poster (with or without abstract) (Annet vitenskapelig)
Abstract [en]

Flexible and cheap electronics are needed for simple applications such as sensors and solar cells. To achieve this, thin functional materials should be deposited efficiently to flexible substrates such as paper. A promising method for the deposition of such materials is through inkjet printing that said a stable and printable dispersion is necessary. We achieved this through liquid-based exfoliation of 2D materials in water using shear exfoliation and cellulose stabilizers. The resulted dispersion was then concentrated and inkjet printed on a flexible substrate. We used ethyl cellulose, cellulose nanofibers (CNF) and ultra-fine cellulose nanofibers (UF-CNF). All three stabilizers appear to work very well for MoS2 nanosheets even though the mechanisms of stabilization were different among them. For the MoS2-EC dispersions we achieved a broader PSD and higher dispersion stability. Thin nanosheets were observed from the SEM image of MoS2-EC dispersions deposited onto cellulose filters. The estimated concentration of the MoS2-EC dispersion after 20 days of sample preparation was 0.20 mg/mL. This dispersion was further processed to adjust the concentration and viscosity.  Good coverage of the substrate was achieved after 50 printing passes. If the same technique is applied to other 2D materials such as graphene (conductor) and boro nitride (insulator), a transistor can be fabricated.

sted, utgiver, år, opplag, sider
Stockholm, 2017.
Emneord [en]
Cellulose stabilizers, 2D ink, 2D materials, Flexible electronics, Cheap transistors
HSV kategori
Identifikatorer
URN: urn:nbn:se:miun:diva-31647OAI: oai:DiVA.org:miun-31647DiVA, id: diva2:1143310
Konferanse
MWP Symposium “Treenomics – From Genomic Information to Business Opportunities”
Prosjekter
KM2
Forskningsfinansiär
Knowledge FoundationTilgjengelig fra: 2017-09-21 Laget: 2017-09-21 Sist oppdatert: 2017-09-21bibliografisk kontrollert

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Forsberg, VivianeZhang, RenyunHummelgård, MagnusOlin, Håkan

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