Non-collapsible PDMS nanochannel fabrication with tunable width and height using single master mold

Chang Beom Kim, Honggu Chun, Jaehun Chung, Ki Bong Song, Sang Hoon Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A tunable polydimethylsiloxane (PDMS) nanoslit fabrication process was developed for biological sample manipulation. A microcontact printing (CP) of laterally spreading self-assembled hexadecanethiol (HDT) layer, combined with in-situ curing of a sliding SU-8 droplet, enabled precise and independent tuning of a nanoslit-mold width and height using single CP master mold. The SU-8 nanoslit-mold was replicated using a hard-soft composite PDMS to prevent channel collapse at low (< 0.2) aspect ratio (height over width). The fluidic characteristics as well as dimensions of nanoslits fabricated with various conditions are analyzed using fluorescein sample and AFM images. Finally, concentration polarization-based sample preconcentration is successfully demonstrated at the nanoslit boundary where an electric double layer is overlapped.

Original languageEnglish
Title of host publication2011 11th IEEE International Conference on Nanotechnology, NANO 2011
Pages1723-1727
Number of pages5
DOIs
Publication statusPublished - 2011
Event2011 11th IEEE International Conference on Nanotechnology, NANO 2011 - Portland, OR, United States
Duration: 2011 Aug 152011 Aug 19

Publication series

NameProceedings of the IEEE Conference on Nanotechnology
ISSN (Print)1944-9399
ISSN (Electronic)1944-9380

Other

Other2011 11th IEEE International Conference on Nanotechnology, NANO 2011
CountryUnited States
CityPortland, OR
Period11/8/1511/8/19

Keywords

  • Composite PDMS
  • Ion preconcentration
  • Microcontact printing
  • Nanoslit
  • Sliding mold method

ASJC Scopus subject areas

  • Bioengineering
  • Electrical and Electronic Engineering
  • Materials Chemistry
  • Condensed Matter Physics

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