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Related Experiment Video

Updated: May 13, 2026

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates
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DNA manipulation and separation in sublithographic-scale nanowire array.

Takao Yasui1, Sakon Rahong, Koki Motoyama

  • 1Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, and FIRST Research Center for Innovative Nanobiodevices, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan. yasui@apchem.nagoya-u.ac.jp

ACS Nano
|March 15, 2013
PubMed
Summary

Researchers developed self-assembled nanowire arrays in microchannels to precisely control and separate long DNA molecules, overcoming limitations in manipulating single biomolecules for applications like nanopore sequencing.

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Area of Science:

  • Biophysics
  • Nanotechnology
  • Molecular Biology

Background:

  • Electrokinetic manipulation of biomolecules in microchannels is limited by lithography for small nanostructures.
  • Manipulating single, long biomolecules like DNA for sequencing remains challenging due to size constraints.

Purpose of the Study:

  • To demonstrate the feasibility of self-assembled nanowire arrays for manipulating and separating long DNA molecules.
  • To overcome the limitations of lithographic technology in controlling nanoscale artificial structures.

Main Methods:

  • Fabrication of a nanowire array embedded in a microchannel on a fused silica substrate.
  • Utilizing electrokinetic forces for biomolecule manipulation.
  • High-resolution optical microscopy for visualizing DNA molecule elongation and behavior.

Main Results:

  • Successfully demonstrated the self-assembly of a nanowire array within a microchannel.
  • Observed fully elongated T4-DNA molecules within the nanowire array using optical microscopy.
  • Showcased the ability to manipulate and separate long DNA molecules.

Conclusions:

  • Self-assembled nanowire arrays offer a flexible platform for controlling single long DNA molecule dynamics.
  • This approach overcomes lithographic limitations for manipulating biomolecules at the sublithographic scale.
  • The technology holds potential for integration with nanopore sequencing and other biomolecular detection methods.