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나노입자 연구단
나노입자 연구단
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Facile Multiscale Patterning by Creep-Assisted Sequential Imprinting and Fuel Cell Application

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Title
Facile Multiscale Patterning by Creep-Assisted Sequential Imprinting and Fuel Cell Application
Author(s)
Jang S.; Minhyoung Kim; Yun Sik Kang; Choi Y.W.; Kim S.M.; Yung-Eun Sung; Choi M.
Publication Date
2016-05
Journal
ACS APPLIED MATERIALS & INTERFACES, v.8, no.18, pp.11459 - 11465
Publisher
AMER CHEMICAL SOC
Abstract
The capability of fabricating multiscale structures with desired morphology and incorporating them into engineering applications is key to realizing technological breakthroughs by employing the benefits from both microscale and nanoscale morphology simultaneously. Here, we developed a facile patterning method to fabricate multiscale hierarchical structures by a novel approach called creep-assisted sequential imprinting. In this work, nanopatterning was first carried out by thermal imprint lithography above the glass transition temperature (Tg) of a polymer film, and then followed by creep-assisted imprinting with micropatterns based on the mechanical deformation of the polymer film under the relatively long-term exposure to mechanical stress at temperatures below the Tg of the polymer. The fabricated multiscale arrays exhibited excellent pattern uniformity over large areas. To demonstrate the usage of multiscale architectures, we incorporated the multiscale Nafion films into polymer electrolyte membrane fuel cell, and this device showed more than 10% higher performance than the conventional one. The enhancement was attributed to the decrease in mass transport resistance because of unique cone-shape morphology by creep-recovery effects and the increase in interfacial surface area between Nafion film and electrocatalyst layer. © 2016 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/2694
ISSN
1944-8244
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
24 ACSAppliedMater(Facile Multiscale Patterning by Creep-Assisted).pdfDownload

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