Nov.15, 2012
They're soft, biocompatible, about 7 millimeters long – and, incredibly, able to walk by themselves. These walking miniature bio-bots were created at the University of Illinois using only hydrogel, heart cells and a 3D printer.
Miniature "bio-bots" can walk on their own. Photo credit: Elise A. Corbin
"The idea is that, by being able to design with biological structures, we can harness the power of cells and nature to address challenges facing society," said Bashir, an Abel Bliss Professor of Engineering. "As engineers, we've always built things with hard materials, materials that are very predictable. Yet there are a lot of applications where nature solves a problem in such an elegant way. Can we replicate some of that if we can understand how to put things together with cells?"
The key to the bio-bots' locomotion is asymmetry. Resembling a tiny springboard, each bot has one long, thin leg resting on a stout supporting leg. The thin leg is covered with rat cardiac cells. When the heart cells beat, the long leg pulses, propelling the bio-bot forward.
The team uses a 3D printer to make the main body of the bot from hydrogel, a soft gelatin-like polymer. This approach allowed the researchers to explore various conformations and adjust their design for maximum speed. With an altered design, the bio-bots could be customized for specific applications in medicine, energy or the environment.
For example, Bashir envisions the bio-bots being used for drug screening or chemical analysis, since the bots' motion can indicate how the cells are responding to the environment. By integrating cells that respond to certain stimuli, such as chemical gradients, the bio-bots could be used as sensors.
"Our goal is to see if we can get this thing to move toward chemical gradients, so we could eventually design something that can look for a specific toxin and then try to neutralize it," said Bashir, who also is a professor of electrical and computer engineering, and of bioengineering.
Next, the team will work to enhance control and function, such as integrating neurons to direct motion or cells that respond to light. They are also working on creating robots of different shapes, different numbers of legs, and robots that could climb slopes or steps.
"The idea here is that you can do it by forward-engineering," said Bashir, who is the director of the Micro and Nanotechnology Laboratory. "We have the design rules to make these millimeter-scale shapes and different physical architectures, which hasn't been done with this level of control. What we want to do now is add more functionality to it."
The research team, led by U. of I. professor Rashid Bashir, published its results in the journal Scientific Reports.
"I think we are just beginning to scratch the surface in this regard," said graduate student Vincent Chan, first author of the paper. "That is what's so exciting about this technology – to be able to exploit some of nature's unique capabilities and utilize it for other beneficial purposes or functions."
Video / Source: Illinois University
Posted in 3D Printing Applications
Maybe you also like:
- World's first 3D printed artificial reef
- Olaf Diegel's 3D-printed Guitars available on Cubify
- 3D printed Water Waves lamps inspired by traditional Chinese painting
- 3D printed Eye of Sauron iPhone 5 case for Lord Of The Rings fans
- The art of 3D print failure
- Keep your earbuds in your ears with 3D printed button
- 3D printed protein model gives hands-on help for learning the secrets of molecules
- Designer Janne Kyttanen launched 3D printed Macedonia case for iPad
- Artist 3D printing museum replica on a Makerbot Replicator
- OpenStructures WaterBoiler Filter by Unfold
- Rebuilding 74-year-old Morris Eight badge with 3D printing
- One Just One: Unique 3D Printed jewellery on Kickstarter
- 3D printing helps Louisville to crowd-source city planning of 2040
- Where to order 3D-printed iPhone 5 cases?
- Replacing antique violin parts using 3D printing
- Founder of Bespoke Innovations and his 3D printed guitar
- Introducing Digital Natives – Glitched objects 3D printed in colour resin
- UVA students build and test 3D printed unmanned aircraft
- Solar Pocket Factory: DIY mini solar panels in the backyard
- Michiel Cornelissen talks about the magic of 3D printing