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Soper, Steven A.
Soper Research Group
Research Interests
  • Micro- and nano-fabrication
  • Lab-on-a-chip
  • Polymeric Microfluidic Devices

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Simple replication methods for producing nanoslits in thermoplastics and the transport dynamics of double-stranded DNA through these slits

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dc.contributor.author Chantiwas, Rattikan ko
dc.contributor.author Hupert, Mateusz L. ko
dc.contributor.author Pullagurla, Swathi R. ko
dc.contributor.author Balamurugan, Subramanian ko
dc.contributor.author Tamarit-Lopez, Jesus ko
dc.contributor.author Park, Sunggook ko
dc.contributor.author Datta, Proyag ko
dc.contributor.author Goettert, Jost ko
dc.contributor.author Cho, Yoon-Kyoung ko
dc.contributor.author Soper, Steven A. ko
dc.date.available 2014-04-09T08:36:05Z -
dc.date.created 2013-06-05 ko
dc.date.issued 2010-12 ko
dc.identifier.citation LAB ON A CHIP, v.10, no.23, pp.3255 - 3264 ko
dc.identifier.issn 1473-0197 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/2767 -
dc.description.abstract Mixed-scale nano-and microfluidic networks were fabricated in thermoplastics using simple and robust methods that did not require the use of sophisticated equipment to produce the nanostructures. High-precision micromilling (HPMM) and photolithography were used to generate mixed-scale molding tools that were subsequently used for producing fluidic networks into thermoplastics such as poly(methyl methacrylate), PMMA, cyclic olefin copolymer, COC, and polycarbonate, PC. Nanoslit arrays were imprinted into the polymer using a nanoimprinting tool, which was composed of an optical mask with patterns that were 2-7 mu m in width and a depth defined by the Cr layer (100 nm), which was deposited onto glass. The device also contained a microchannel network that was hot embossed into the polymer substrate using a metal molding tool prepared via HPMM. The mixed-scale device could also be used as a master to produce a polymer stamp, which was made from polydimethylsiloxane, PDMS, and used to generate the mixed-scale fluidic network in a single step. Thermal fusion bonding of the cover plate to the substrate at a temperature below their respective T(g) was accomplished by oxygen plasma treatment of both the substrate and cover plate, which significantly reduced thermally induced structural deformation during assembly: similar to 6% for PMMA and similar to 9% for COC nanoslits. The electrokinetic transport properties of double-stranded DNA (dsDNA) through the polymeric nanoslits (PMMA and COC) were carried out. In these polymer devices, the dsDNA demonstrated a field-dependent electrophoretic mobility with intermittent transport dynamics. DNA mobilities were found to be 8.2 +/- 0.7 x 10(-4) cm(2) V(-1) s(-1) and 7.6 +/- 0.6 x 10(-4) cm(2) V(-1) s(-1) for PMMA and COC, respectively, at a field strength of 25 V cm(-1). The extension factors for lambda-DNA were 0.46 in PMMA and 0.53 in COC for the nanoslits (2-6% standard deviation). ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher ROYAL SOC CHEMISTRY ko
dc.title Simple replication methods for producing nanoslits in thermoplastics and the transport dynamics of double-stranded DNA through these slits ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-78149365721 ko
dc.identifier.wosid 000284068200010 ko
dc.type.rims ART ko
dc.description.wostc 17 *
dc.description.scopustc 17 *
dc.date.tcdate 2015-02-28 *
dc.date.scptcdate 2014-07-12 *
dc.identifier.doi 10.1039/c0lc00096e ko
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=78149365721 ko
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