Absolute and arbitrary orientation of single-molecule shapes

Area of Science:

• Nanotechnology
• Molecular Engineering
• Biophysics

Background:

• DNA origami offers a versatile platform for creating nanoscale devices by combining molecular and colloidal components.
• Integrating these nanoscale devices with microfabricated systems presents challenges in precise positioning and alignment.

Purpose of the Study:

• To develop a method for precise alignment and orientation of DNA origami nanostructures on surfaces.
• To demonstrate the capability for large-scale integration of precisely oriented DNA origami devices.

Main Methods:

• Designing a DNA origami molecule with a unique energy landscape on lithographic binding sites.
• Utilizing this energy landscape to achieve precise angular alignment (within 3.2°) on silica surfaces.
• Demonstrating absolute and arbitrary orientation control for individual molecules.

Main Results:

• Achieved highly accurate device alignment and orientation control on silica surfaces.
• Optimized device performance by aligning fluorescent emission dipoles within optical cavities.
• Successfully integrated 3456 DNA origami molecules with 12 distinct orientations for polarization indication.

Conclusions:

• The developed DNA origami strategy enables precise nanoscale device alignment and orientation.
• This method facilitates the large-scale integration of nanodevices for advanced optical and electronic applications.
• Independent orientation control opens new possibilities for optimizing nanodevice performance.