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Preventing Thin Film Dewetting via 2D Capping
Demonstrated that a monolayer 2D capping layer with high Young’s modulus effectively suppresses dewetting of underlying polymer, metal, and organic semiconductor thin films.
Significance and Impact
Opens new opportunities to enhance the thermal stability and expands the processing parameters for thin film materials without significantly altering their physical properties.
- Universality of the capping approach was confirmed by transferring a single layer of 2-D materials such as graphene or MoS2, onto a film surface of polystyrene, semiconducting thienoazacoronene (EH-TAC) and gold.
- Thermodynamic modeling indicated that the exceptionally high Young’s modulus and surface conformity of 2D capping layers substantially suppress surface fluctuations and thus dewetting.
P. Cao, P. Bai, A. A. Omrani, Y. Xiao, K. L. Meaker, H.-Z. Tsai, A. Yan, H. S. Jung, R. Khajeh, G. F. Rodgers, Y. Kim, A. S. Aikawa, M. A. Kolaczkowski, Y. Liu, A. Zettl, K. Xu, M. F. Crommie, T. Xu, Adv. Mater. 1701536 (2017) DOI: 10.1002/adma.201701536