Related Experiment Video
Updated: Jun 22, 2026
07:59
Folding and Characterization of a Bio-responsive Robot from DNA Origami
Published on: December 3, 2015
Single-DNA molecule nanomotor regulated by photons
Huaizhi Kang1, Haipeng Liu, Joseph A Phillips
1Center for Research at Bio/Nano Interface, Department of Chemistry, Shands Cancer Center, UF Genetics Institute and McKnight Brain Institute, University of Florida, Gainesville, Florida 32611-7200, USA.
Nano Letters
|June 9, 2009
Summary
Researchers developed a single-molecule DNA nanomotor powered by light. This novel photon-driven motor, utilizing azobenzene and a hairpin structure, shows high efficiency and concentration-independent function for potential applications.
Area of Science:
- Molecular Engineering
- Nanotechnology
- Biophysics
Background:
- Single-molecule nanomachines offer precise control and reduced complexity compared to multi-component systems.
- Photocontrollable molecular switches are crucial for developing light-driven nanodevices.
- DNA nanotechnology provides a versatile platform for constructing complex molecular machines.
Purpose of the Study:
- To design and characterize a novel single-molecule nanomotor.
- To investigate the efficiency of light-driven actuation in a DNA-based system.
- To explore the advantages of intramolecular interactions and hairpin structures for nanomotor functionality.
Main Methods:
- Design of a DNA hairpin-structured molecule incorporating azobenzene moieties.
- Utilizing UV-vis irradiation for reversible photocontrollable switching.
- Quantifying open-close conversion efficiency under repeated light exposure.
Main Results:
- The single-molecule nanomotor demonstrated a 40-50% open-close conversion efficiency.
- The nanomotor operates effectively under mild conditions with no waste production.
- Intramolecular interactions in the single-molecule system provide concentration-independent motor functionality.
- The hairpin structure enhances light-to-movement energy conversion efficiency.
Conclusions:
- Azobenzene-incorporated, hairpin-structured single-molecule DNA nanomotors are efficient light-driven molecular motors.
- This design offers advantages in terms of regulated response, mild operating conditions, and concentration independence.
- The developed nanomotor shows significant potential for applications requiring high-efficiency light-driven molecular motion.
