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Single nanopore transport of synthetic and biological polyelectrolytes in three-dimensional hybrid microfluidic/nanofluidic devices

Journal Article · · Biomicrofluidics
DOI:https://doi.org/10.1063/1.3059546· OSTI ID:1076433
 [1];  [2];  [3]
  1. Univ. of Illinois at Urbana-Champaign, IL (United States). Dept. of Chemistry; Univ. of Notre Dame, South Bend, IN (United States). Dept. of Chemical and Biomolecular Engineering
  2. Univ. of Notre Dame, South Bend, IN (United States). Dept. of Chemical and Biomolecular Engineering
  3. Univ. of Notre Dame, South Bend, IN (United States). Dept. of Chemical and Biomolecular Engineering, Dept. of Chemistry and Biochemistry

This paper presents a study of electrokinetic transport in single nanopores integrated into vertically-stacked three-dimensional hybrid microfluidic/nanofluidic structures. In these devices single nanopores, created by focused ion beam (FIB) milling in thin polymer films, provide fluidic connection between two vertically separated, perpendicular microfluidic channels. Experiments address both systems in which the nanoporous membrane is composed of the same (homojunction) or different (heterojunction) polymer as the microfluidic channels. These devices are then used to study the electrokinetic transport properties of synthetic (i.e., polystyrene sulfonate and polyallylamine) and biological (i.e.,DNA) polyelectrolytes across these nanopores. Single nanopore transport of polyelectrolytes across these nanopores using both electrical current measurements and confocal microscopy. Both optical and electrical measurements indicate that electroosmotic transport is predominant over electrophoresis in single nanopores with d > 180 nm, consistent with results obtained under similar conditions for nanocapillary array membranes.

Research Organization:
University of Notre Dame, Notre Dame, IN (United States)
Sponsoring Organization:
USDOE SC Office of Biological and Environmental Research (SC-23)
Grant/Contract Number:
FG02-07ER15851
OSTI ID:
1076433
Journal Information:
Biomicrofluidics, Journal Name: Biomicrofluidics Journal Issue: 1 Vol. 3; ISSN 1932-1058
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Nanofluidics in chemical analysis journal January 2010
Development of in-flow label-free single molecule sensors using planar solid-state nanopore integrated microfluidic devices journal September 2018

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