期刊
ACS APPLIED MATERIALS & INTERFACES
卷 3, 期 11, 页码 4201-4205出版社
AMER CHEMICAL SOC
DOI: 10.1021/am200836n
关键词
coatings; self-assembly; polymers; capillary forces; soft lithography; adhesion
资金
- James H. Zumberge Faculty
- Annenberg Graduate Fellowship
- Viterbi School of Engineering
In this paper, we demonstrate that thin layers of polymer coatings can be used to self-assemble pillars into stable microstructures. Polymer coatings are deposited onto elastomeric pillars using solventless initiated chemical vapor deposition and capillary forces are used to collapse the coated pillars into microstructures. The location of pillar collapse can be controlled by patterning regions of hydrophilicity and hydrophobicity. Poly(hydroxyethyl methacrylate) and poly(methacrylic acid) coatings stabilize the self-assembled microstructures by providing an adhesive force through solvent bonding. These solvent bonds allow the response of the microstructures to be tuned by varying the thickness of the polymer coating and the solubility parameter of the solvent. The coating process described in this paper is substrate-independent and therefore can be applied to pillars composed of any material.
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