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Related Experiment Videos

Single DNA molecule detection using nanopipettes and nanoparticles.

Miloslav Karhanek1, Jennifer T Kemp, Nader Pourmand

  • 1Department of Biochemistry, Stanford Genome Technology Center, Stanford University, Stanford, CA 94304, USA. karhanek@stanford.edu

Nano Letters
|March 30, 2005
PubMed
Summary
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Nanoparticle-labeled DNA is detected using ionic current blockades in a nanopipette. This method aids in identifying single DNA and protein molecules and understanding biomolecular interactions.

Area of Science:

  • Biophysics
  • Nanotechnology
  • Molecular Biology

Background:

  • Single molecule detection is crucial for understanding biological processes.
  • Nanopore sensing offers a label-free approach for analyzing biomolecules.
  • Ionic current measurements can reveal information about translocating molecules.

Purpose of the Study:

  • To demonstrate the detection of single DNA molecules labeled with nanoparticles using nanopipette ionic current blockade.
  • To explore the potential of this technique for identifying DNA and protein molecules.
  • To gain insights into the stochastic interactions of biomolecules.

Main Methods:

  • Formation of a nanopipette tip from a pulled glass capillary.
  • Translocation of single DNA molecules labeled with nanoparticles through the nanopipette.

Related Experiment Videos

  • Monitoring and analyzing ionic current blockades during translocation.

    • Main Results:

    • Successful detection of single DNA molecules via ionic current blockades.
    • Demonstration of nanoparticle-labeled DNA translocation through the nanopipette.
    • Correlation between blockade events and the presence of DNA molecules.

    Conclusions:

    • Nanopipette ionic current blockade is an effective method for detecting nanoparticle-labeled single DNA molecules.
    • The technique shows promise for the identification of DNA and protein molecules.
    • This approach provides a platform for studying biomolecular interactions at the single-molecule level.