Molecular nanomachines: physical principles and implementation strategies

Area of Science:

• Nanotechnology and Molecular Engineering
• Supramolecular Chemistry
• Biomimetic Systems

Background:

• Current laboratory techniques limit the construction of artificial molecular machines for mechanosynthesis.
• Molecular machine systems require mechanical positioning for controlled chemical synthesis.
• Existing concepts and technology requirements for mechanosynthesis have been defined.

Purpose of the Study:

• To explore the potential and requirements for artificial molecular machine systems capable of mechanosynthesis.
• To review progress in protein engineering and self-assembly for designing molecular machines.
• To outline potential applications of molecular machine technology.

Main Methods:

• Modeling of mechanosynthetic systems to understand positioning effects on concentration and control.
• Conceptualizing fabrication approaches, including Atomic Force Microscope (AFM)-based devices.
• Leveraging advances in protein engineering for designing stable, self-assembling molecular structures.

Main Results:

• Mechanosynthetic systems can achieve high effective concentrations (>100 M) and precise spatial control of molecular interactions.
• AFM-based devices offer a potential fabrication route for molecular machine systems.
• Progress in protein engineering supports the design of self-assembling biomimetic systems.

Conclusions:

• Artificial molecular machines for mechanosynthesis are a promising future technology, despite current limitations.
• Molecular machine technology shares enabling advancements with molecular electronics and self-assembling systems.
• Further research is warranted for developing and producing novel instruments and products using molecular machines.