Guiding the Dewetting of Thin Polymer Films by Colloidal Imprinting

Manuel Ghezzi, Peng Yuan Wang, Peter Kingshott, Chiara Neto

研究成果: 雜誌貢獻文章同行評審

5 引文 斯高帕斯(Scopus)


Micropatterned surfaces are important in many biomedical and bioengineering applications, such as the development of biosensors. An approach for the creation of ordered surface patterns, fabricated combining colloidal crystals, consisting of ordered layers of micrometric particles, with dewetting of bilayers of thin polymer films is introduced. The produced patterns are both topographical and chemical in nature, consisting of ordered arrays of microscale holes imprinted in a polymer film, with tunable size. The spontaneous dewetting of the polymer film enables this tunability, with a maximum sevenfold increase in lateral size of the holes and sixfold increase in depth from imprinting to coalescence with neighboring holes. Polymer dewetting and layer inversion are seen to compete during the annealing of the polymer bilayers, and the optimal conditions for hole growth are identified. An in-depth investigation highlights the effects of UV-ozone treatment on the long-range ordering of the colloidal crystals and on preventing the dewetting of the imprinted bilayers. Ordered patterns of different size and depth are produced over large areas by tuning of the colloidal crystal assembly, UV surface treatment and dewetting conditions. Potential applications of the micropatterns produced in the present work include microarrays for single cell studies and biosensors.
期刊Advanced Materials Interfaces
出版狀態已發佈 - 七月 1 2015

ASJC Scopus subject areas

  • 材料力學
  • 機械工業


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