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Park, Soojin
Nano-Functional Materials Lab
Research Interests
  • Block Copolymers, nanostructured materials for Lithium-Ion batteries, wearable and stretchable energy storage applications

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Spatial control of dewetting: Highly ordered Teflon nanospheres

Cited 16 times inthomson ciCited 14 times inthomson ci
Title
Spatial control of dewetting: Highly ordered Teflon nanospheres
Author
Park, HyungminRussell, Thomas P.Park, Soojin
Keywords
Confined geometries; De-wetting; Degree of order; Hydrophobic surfaces; Nano-structured; Patterned surface; Precursor films; Precursor solutions; Saw-tooth; Separation distances; Spatial control; Surface energies; Teflon films; Teflon nanosphere
Issue Date
201008
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
JOURNAL OF COLLOID AND INTERFACE SCIENCE, v.348, no.2, pp.416 - 423
Abstract
We demonstrate a simple route for fabricating Teflon nanospheres with high degree of order by guiding with saw-toothed patterns having different pitches and amplitudes. Teflon precursor solutions were spin-coated onto substrates with different surface energies. Immediately after spin-coating, a saw-toothed patterned surface was brought into contact with the precursor film at 120 degrees C for 1 min to induce dewetting of the film but in the confined geometry defined by the saw-tooth pattern. Depending on the pitches and amplitudes of saw-toothed patterns, arrays of highly ordered nanospheres having a range of sizes and separation distances were obtained. And also sizes of Teflon droplets can be tuned by changing the thickness of Teflon film. Hydrophobic nanostructured Teflon patterns can be used as masters for fabricating polymeric replica and as hydrophobic surfaces.
URI
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DOI
http://dx.doi.org/10.1016/j.jcis.2010.05.011
ISSN
0021-9797
Appears in Collections:
ECHE_Journal Papers

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