Bacteria-Sized Robots for Precision Drug Delivery | Bradley Nelson

TL;DR

Scientists are developing micro machines inspired by nature and using magnetic fields to propel them, with potential applications in medicine.

Transcript

I'm a mechanical engineer I like to build small machines I like to build small machines that move this is a mag might you can see how small it is about ten of them are the size of a grain of salt we have a lot of fun with these over the years we use them to play soccer we torture ants with them we made a little pac-man maze to drive them through th... Read More

Key Insights

• 😷 Hollywood films like "Fantastic Voyage" have sparked interest in the concept of shrinking machines for medical purposes, but real-world applications require considering the physics and fabrication challenges.
• 🦠 Nature, specifically microorganisms like paramecia and bacteria, provides inspiration for the design and movement of micro machines.
• 🦠 The development of nanotechnology, particularly 3D nano printing, has enabled the creation of more complex and functional micro machines.
• 🎮 Magnetic fields play a crucial role in propelling and controlling micro machines, offering potential applications in various industries, including medicine.
• 👻 Attaching DNA to micro machines allows for their interaction with cells and the potential to deliver targeted treatments.
• 😷 Micro machines have shown promise in medical procedures, such as treating cardiac arrhythmia, offering precise control and minimally invasive options.
• 😷 The importance of collaboration between academia and industry is highlighted through the spin-off company developing real medical devices based on micro machines.

Questions & Answers

Q: How are micro machines propelled?

Micro machines are propelled using oscillating magnetic fields, inspired by the flagella of bacteria like E. coli. By attaching magnets to nano ribbons and placing them in rotating magnetic fields, these machines are able to move forward.

Q: What is the significance of 3D nano printing in creating micro machines?

3D nano printing allows for the fabrication of complex structures at the nanoscale. This technology has opened up new possibilities for creating and functionalizing micro machines, including attaching DNA to them for specific purposes.

Q: How have micro machines been utilized in medical applications?

Micro machines have been used in medicine for precise procedures, such as treating cardiac arrhythmia. By connecting the machines to a tether and guiding them with a magnet on a catheter, doctors can ablate specific sections of heart tissue to reset the heart's rhythm.

Q: Can micro machines be injected into living organisms?

Yes, micro machines can be injected into living organisms. By attaching DNA to the machines, they can interact with cells and potentially deliver specific treatments or study biological processes.

Summary & Key Takeaways

• Micro machines, smaller than a grain of salt, are being built and controlled using magnetic fields, inspired by nature such as the flagella of bacteria and the movement of paramecia.

• Nanotechnology, specifically 3D nano printing, has opened up new possibilities for creating and functionalizing these micro machines, including attaching DNA to manipulate cells and injecting them into living organisms.

• The use of magnetic fields to drive these micro machines and control their movements has led to the development of a real device for precise medical procedures, such as treating cardiac arrhythmia.