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    Fabrication of Monolithic Bridge Structures by Vacuum-Assisted Capillary-Force Lithography

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    Type
    Article
    Authors
    Kwak, Rhokyun
    Jeong, Hoon Eui
    Suh, Kahp Y.
    KAUST Grant Number
    KUK-F1-037-02
    Date
    2009-04-06
    Permanent link to this record
    http://hdl.handle.net/10754/598302
    
    Metadata
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    Abstract
    Monolithic bridge structures were fabricated by using capillary-force lithography (CFL), which was developed for patterning polymers over a large area by combining essential features of nanoimprint lithography and capillarity. A patterned soft mold was placed on a spin-coated UV-curable resin on a substrate. The polymer then moved into the cavity of the mold by capillary action and then solidified after exposure to UV radiation. The uncured resin was forced to migrate into the cavity of a micropatterned PDMS mold by capillarity, and then exposed to UV radiation under a high-energy mercury lamp with intensity. A rotary pump was then turned on, decreasing the air pressure in the chamber. SEM images were taken with a high-resolution SEM at an acceleration voltage greater than 15 kV. It was observed that when the air pressure was rapidly reduced to a low vacuum, the top layer moved into the nanochannels with a meniscus at the interface between the nanoscale PUA and the base structure.
    Citation
    Kwak R, Jeong HE, Suh KY (2009) Fabrication of Monolithic Bridge Structures by Vacuum-Assisted Capillary-Force Lithography. Small 5: 790–794. Available: http://dx.doi.org/10.1002/smll.200900219.
    Sponsors
    This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korean government (MOST) (R01-2007-000-20675-0), the King Abdullah University of Science and Technology (KAUST) program (No. KUK-F1-037-02), and the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (Grant KRF-J03000). This work was supported in part by the Center for Nanoscale Mechatronics & Manufacturing (Grant 08K1401-00210) and the Grant-in-Aid for Strategy Technology Development Programs from the Korean Ministry of Knowledge Economy (No.10030046).
    Publisher
    Wiley
    Journal
    Small
    DOI
    10.1002/smll.200900219
    PubMed ID
    19296558
    ae974a485f413a2113503eed53cd6c53
    10.1002/smll.200900219
    Scopus Count
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