Mechanical Robustness of Graphene on Flexible Transparent Substrates

Moon H. Kang, Lizbeth O. Prieto López, Bingan Chen, Ken Teo, John A. Williams, William I. Milne, Matthew Cole

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

This study reports on a facile and widely applicable method of transferring chemical vapor deposited (CVD) graphene uniformly onto optically transparent and mechanically flexible substrates using commercially available, low-cost ultraviolet adhesive (UVA) and hot-press lamination (HPL). We report on the adhesion potential between the graphene and the substrate, and we compare these findings with those of the more commonly used cast polymer handler transfer processes. Graphene transferred with the two proposed methods showed lower surface energy and displayed a higher degree of adhesion (UVA: 4.40 ± 1.09 N/m, HPL: 0.60 ± 0.26 N/m) compared to equivalent CVD-graphene transferred using conventional poly(methyl methacrylate) (PMMA: 0.44 ± 0.06 N/m). The mechanical robustness of the transferred graphene was investigated by measuring the differential resistance as a function of bend angle and repeated bend-relax cycles across a range of bend radii. At a bend angle of 100° and a 2.5 mm bend radius, for both transfer techniques, the normalized resistance of graphene transferred on polyethylene terephthalate (PET) was around 80 times less than that of indium-tin oxide on PET. After 104 bend cycles, the resistance of the transferred graphene on PET using UVA and HPL was found to be, on average, around 25.5 and 8.1% higher than that of PMMA-transferred graphene, indicating that UVA- and HPL-transferred graphene are more strongly adhered compared to PMMA-transferred graphene. The robustness, in terms of maintained electrical performance upon mechanical fatigue, of the transferred graphene was around 60 times improved over ITO/PET upon many thousands of repeated bending stress cycles. On the basis of present production methods, the development of the next-generation of highly conformal, diverse form factor electronics, exploiting the emerging family of two-dimensional materials, necessitates the development of simple, low-cost, and mechanically robust transfer processes; the developed UVA and HPL approaches show significant potential and allow for large-area-compatible, near-room temperature transfer of graphene onto a diverse range of polymeric supports.

Original languageEnglish
Pages (from-to)22506-22515
Number of pages10
JournalACS Applied Materials and Interfaces
Volume8
Issue number34
Early online date2 Aug 2016
DOIs
Publication statusPublished - 31 Aug 2016

Fingerprint

Graphite
Graphene
Substrates
Polyethylene Terephthalates
Polymethyl Methacrylate
Adhesives
Polyethylene terephthalates
Adhesion
Vapors
Tin oxides
Polymethyl methacrylates
Interfacial energy
Indium
Costs
Polymers
Electronic equipment
Fatigue of materials

Keywords

  • adhesion
  • CVD graphene
  • flexible electronics
  • large-area transfer
  • optical transparency
  • surface energy
  • time stability

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Kang, M. H., Prieto López, L. O., Chen, B., Teo, K., Williams, J. A., Milne, W. I., & Cole, M. (2016). Mechanical Robustness of Graphene on Flexible Transparent Substrates. ACS Applied Materials and Interfaces, 8(34), 22506-22515. https://doi.org/10.1021/acsami.6b06557

Mechanical Robustness of Graphene on Flexible Transparent Substrates. / Kang, Moon H.; Prieto López, Lizbeth O.; Chen, Bingan; Teo, Ken; Williams, John A.; Milne, William I.; Cole, Matthew.

In: ACS Applied Materials and Interfaces, Vol. 8, No. 34, 31.08.2016, p. 22506-22515.

Research output: Contribution to journalArticle

Kang, MH, Prieto López, LO, Chen, B, Teo, K, Williams, JA, Milne, WI & Cole, M 2016, 'Mechanical Robustness of Graphene on Flexible Transparent Substrates', ACS Applied Materials and Interfaces, vol. 8, no. 34, pp. 22506-22515. https://doi.org/10.1021/acsami.6b06557
Kang MH, Prieto López LO, Chen B, Teo K, Williams JA, Milne WI et al. Mechanical Robustness of Graphene on Flexible Transparent Substrates. ACS Applied Materials and Interfaces. 2016 Aug 31;8(34):22506-22515. https://doi.org/10.1021/acsami.6b06557
Kang, Moon H. ; Prieto López, Lizbeth O. ; Chen, Bingan ; Teo, Ken ; Williams, John A. ; Milne, William I. ; Cole, Matthew. / Mechanical Robustness of Graphene on Flexible Transparent Substrates. In: ACS Applied Materials and Interfaces. 2016 ; Vol. 8, No. 34. pp. 22506-22515.
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