This DNA robot based on the DNA origami is capable of delivering drugs and hunting viruses in the body.
A research by Harbin Institute of Technology states that DNA robots are emerging as a ground-breaking technological innovation, built using the unique structural and programmable properties of DNA. These nanoscale machines are engineered through advanced DNA folding techniques, often referred to as DNA origami. This method allows scientists to design and assemble precise three-dimensional structures by folding DNA strands into specific shapes that can act as functional mechanical elements.
At the core of this technology is the ability to translate principles from conventional robotics into molecular systems. Researchers construct rigid and flexible segments within DNA structures, enabling controlled motion and mechanical behaviour at an extremely small scale. By carefully designing these components, DNA robots can perform repeatable and predictable actions despite operating in highly dynamic environments.
A key technological mechanism driving DNA robots is DNA strand displacement. This process enables programmable motion and logic by using specially designed DNA sequences that interact in a controlled manner. In this system, one strand of DNA can replace another, triggering structural changes that function as movement or mechanical responses. These interactions effectively serve as the “fuel” and “control system” of the robot, allowing for step-by-step execution of tasks.
In addition to biochemical control, DNA robots can also be guided using external physical stimuli. Electric fields, magnetic fields, and light-based signals are being integrated into their design to influence movement and behavior. This hybrid control approach, combining internal molecular programming with external inputs, provides a versatile toolkit for precise manipulation at the nanoscale.
Another important aspect of the technology is its ability to interface with other materials. DNA structures can act as programmable templates, positioning nanoparticles and other components with sub-nanometer accuracy. This capability opens pathways for constructing highly organized molecular systems, including nanoscale circuits and optical devices.
However, engineering at this scale introduces challenges. Brownian motion, or random molecular movement, complicates control and stability. Additionally, the lack of comprehensive mechanical data and advanced simulation tools limits predictive design.
Despite these hurdles, ongoing research is focused on refining design frameworks, improving modeling capabilities, and developing standardized DNA-based components to advance this rapidly evolving technology.
