Preventing Thin Film Dewetting via Graphene Capping

Peigen Cao¹, Peter Bai^{2

3}, Arash A Omrani¹, Yihan Xiao^{2

3}, Kacey L Meaker¹, Hsin-Zon Tsai¹, Aiming Yan¹, Han Sae Jung¹, Ramin Khajeh¹, Griffin F Rodgers¹, Youngkyou Kim¹, Andrew S Aikawa¹, Mattew A Kolaczkowski⁴, Yi Liu⁴, Alex Zettl^{1

2

5}, Ke Xu⁶, Michael F Crommie^{1

2

5}, Ting Xu^{3

2

6}

Affiliations

¹ Department of Physics, University of California Berkeley, Berkeley, CA, 94720, USA.
² Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
³ Department of Materials Science and Engineering, University of California Berkeley, Berkeley, CA, 94720, USA.
⁴ The Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA, 94720, USA.
⁵ Kavli Energy NanoSciences Institute, University of California Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
⁶ Department of Chemistry, University of California, Berkeley, CA, 94720, USA.

PMID: 28722188
DOI: 10.1002/adma.201701536

Preventing Thin Film Dewetting via Graphene Capping

Peigen Cao et al. Adv Mater. 2017 Sep.

. 2017 Sep;29(36).

doi: 10.1002/adma.201701536. Epub 2017 Jul 19.

Authors

Affiliations

¹ Department of Physics, University of California Berkeley, Berkeley, CA, 94720, USA.
² Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
³ Department of Materials Science and Engineering, University of California Berkeley, Berkeley, CA, 94720, USA.
⁴ The Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA, 94720, USA.
⁵ Kavli Energy NanoSciences Institute, University of California Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
⁶ Department of Chemistry, University of California, Berkeley, CA, 94720, USA.

PMID: 28722188
DOI: 10.1002/adma.201701536

Abstract

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 MoS₂ on PS. Thermodynamic modeling indicates that the exceptionally high Young's modulus and surface conformity of 2D capping layers such as graphene and MoS₂ 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.

Keywords: anti-dewetting; graphene; metallic thin films; polymeric thin films.

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Preventing Thin Film Dewetting via Graphene Capping

Affiliations

Preventing Thin Film Dewetting via Graphene Capping

Authors

Affiliations

Abstract

LinkOut - more resources

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Research Materials