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Updated: Aug 14, 2025
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Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores
Published on: October 31, 2013
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Super-Resolution Detection of DNA Nanostructures Using a Nanopore
Kaikai Chen1, Adnan Choudhary2, Sarah E Sandler1
1Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
Advanced Materials (Deerfield Beach, Fla.)
|January 11, 2023
Summary
This study demonstrates label-free electrical sensing of single molecules at nanometer resolution using solid-state nanopores. This breakthrough enables high-resolution DNA mapping and digital data storage without molecular motors.
Area of Science:
- Nanotechnology
- Biophysics
- Molecular Biology
Background:
- High-resolution analysis of biomolecules is crucial for understanding biological processes and advancing biosensing.
- Current methods for analyzing unlabeled single molecules in their native states are limited, despite advances in imaging technologies.
Purpose of the Study:
- To demonstrate label-free electrical sensing of structured single molecules with single-digit nanometer spatial resolution.
- To develop a general approach for enhancing the resolution of single-molecule nanopore sensing.
Main Methods:
- Utilizing a narrow solid-state nanopore to detect nanostructures attached to a translocating DNA molecule.
- Leveraging nanostructure-induced electric field enhancement at the nanopore tip to achieve super-resolution.
Main Results:
- Successfully resolved individual nanostructures as close as 6 nm apart.
- Achieved detection of surface-to-surface gap distances as small as 2 nm.
- Demonstrated label-free electrical sensing with unprecedented spatial resolution.
Conclusions:
- The developed method offers a general approach to significantly improve single-molecule nanopore sensing resolution.
- This work is a critical advance towards label-free, high-resolution DNA sequence mapping.
- Presents a novel method for digital information storage independent of molecular motors.
