Preventing Thin Film Dewetting via Graphene Capping

Cao, Peigen; Bai, Peter; Omrani, Arash A.; Xiao, Yihan; Meaker, Kacey L.; Tsai, Hsin‐Zon; Yan, Aiming; Jung, Han Sae; Khajeh, Ramin; Rodgers, Griffin F.; Kim, Youngkyou; Aikawa, Andrew S.; Kolaczkowski, Mattew A.; Liu, Yi; Zettl, Alex; Xu, Ke; Crommie, Michael F.; Xu, Ting

doi:10.1002/adma.201701536

Preventing Thin Film Dewetting via Graphene Capping

Journal Article · Wed Jul 19 00:00:00 EDT 2017 · Advanced Materials

DOI:https://doi.org/10.1002/adma.201701536· OSTI ID:1393690

Cao, Peigen ^[1]; Bai, Peter ^[2]; Omrani, Arash A. ^[1]; Xiao, Yihan ^[2]; Meaker, Kacey L. ^[1]; Tsai, Hsin‐Zon ^[1]; Yan, Aiming ^[1]; Jung, Han Sae ^[1]; Khajeh, Ramin ^[1]; Rodgers, Griffin F. ^[1]; Kim, Youngkyou ^[1]; Aikawa, Andrew S. ^[1]; Kolaczkowski, Mattew A. ^[3]; Liu, Yi ^[3]; Zettl, Alex ^[4]; Xu, Ke ^[5]; Crommie, Michael F. ^[4]; Xu, Ting ^[6]

Department of Physics University of California Berkeley Berkeley CA 94720 USA
Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA, Department of Materials Science and Engineering University of California Berkeley Berkeley CA 94720 USA
The Molecular Foundry Lawrence Berkeley National Laboratory One Cyclotron Road Berkeley CA 94720 USA
Department of Physics University of California Berkeley Berkeley CA 94720 USA, Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA, Kavli Energy NanoSciences Institute University of California Berkeley and the Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
Department of Chemistry University of California Berkeley CA 94720 USA
Department of Materials Science and Engineering University of California Berkeley Berkeley CA 94720 USA, Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA, Department of Chemistry University of California Berkeley CA 94720 USA

A monolayer 2D capping layer with high Young's modulus is shown to be able to effectively suppress the dewetting of underlying thin films of small organic semiconductor molecule, polymer, and polycrystalline metal, respectively. To verify the universality of this capping layer approach, the dewetting experiments are performed for single‐layer graphene transferred onto polystyrene (PS), semiconducting thienoazacoronene (EH‐TAC), gold, and also MoS ₂ on PS. Thermodynamic modeling indicates that the exceptionally high Young's modulus and surface conformity of 2D capping layers such as graphene and MoS ₂ substantially suppress surface fluctuations and thus dewetting. As long as the uncovered area is smaller than the fluctuation wavelength of the thin film in a dewetting process via spinodal decomposition, the dewetting should be suppressed. The 2D monolayer‐capping approach opens up exciting new possibilities to enhance the thermal stability and expands the processing parameters for thin film materials without significantly altering their physical properties.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-05CH11231; AC02-05CH11231

OSTI ID:: 1393690

Journal Information:: Advanced Materials, Journal Name: Advanced Materials Journal Issue: 36 Vol. 29; ISSN 0935-9648

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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