Site-directed placement of three-dimensional DNA origami

Area of Science:

• Nanotechnology
• Materials Science
• Biotechnology

Background:

• Two-dimensional DNA origami combined with lithography enables sub-micrometre patterning for photonic crystals and sensing arrays.
• Existing methods are limited to two dimensions, restricting the complexity of nanoscale architectures.

Purpose of the Study:

• To extend DNA origami to the third dimension by mounting 3D structures onto nanopatterned substrates.
• To create stable, high-resolution hybrid DNA-silica nanostructures.
• To demonstrate the versatile positioning of inorganic components within 3D DNA origami architectures.

Main Methods:

• Mounting three-dimensional DNA origami structures onto nanopatterned substrates.
• Silicification of DNA origami to form hybrid DNA-silica structures.
• Incorporation of gold nanoparticles as inorganic components.

Main Results:

• Achieved feature sizes in the sub-10-nm regime with hybrid DNA-silica structures.
• Demonstrated mechanical and chemical stability of the resulting nanostructures.
• Successfully positioned gold nanoparticles in a three-dimensional arrangement using DNA origami.

Conclusions:

• The developed method offers a versatile and scalable approach for 3D nanotexturing.
• This technique allows for the precise, three-dimensional positioning of diverse inorganic and organic components.
• Potential for low-cost production of complex, molecularly designed 3D patterned surfaces and integrated devices.