First they walked. Then they saw the light. Now small biological robots have a new trick. It’s remote control.
According to researchers at the University of Illinois at Urbana-Champaign, Northwestern University and cooperating institutions, the hybrid “eBiobots” are the first to combine soft materials, living muscles and microelectronics. They described centimeter-scale biomachines in the journal Science Robotics.
“The integration of microelectronics enables the fusion of the worlds of biology and electronics, both of which have many unique advantages and could serve many future medical, sensing and environmental applications. We will be able to manufacture these electronic biobots and machines,” said the study. Co-leader Rashid Bashir is an Illinois professor of bioengineering and dean of the Grainger College of Engineering.
Bashir’s group is pioneering the development of biobots, small biological robots powered by mouse muscle tissue grown on 3D-printed soft polymer scaffolds. They demonstrated his walking biobot in 2012 and light-activated biobot in 2016. Photoactivation has given researchers some control, but the question of how to deliver light pulses to biobots outside the laboratory has limited their practical application.
The answer to that question comes from flexible bioelectronics pioneer Professor John A. Rogers of Northwestern University. His team helped integrate tiny wireless his microelectronics and battery-free micro LEDs. This allowed the researcher to remotely control his eBiobot.
“This unusual combination of technology and biology opens up enormous opportunities to create artificial systems that are self-repairing, learning, evolving, communicating, and self-organizing. Rogers, Professor of Surgery and Director of the Quarry Simpson Institute for Bioelectronics, said:
To give biobots the freedom of movement needed for practical applications, researchers set out to eliminate bulky batteries and tethering wires. The eBiobot uses a receiving coil to collect power and provide a regulated output voltage to power a micro LED, says Zhengwei Li, co-first author and assistant professor of biomedical engineering at the University of Houston. says Mr.
Researchers can send a wireless signal to the eBiobot that pulses an LED. The LEDs stimulate light-sensitive artificial muscles to contract, moving polymer legs to make the machine “walk.” The micro LEDs are targeted to activate specific parts of the muscle, directing the eBiobot in the desired direction.
Researchers used computational modeling to optimize the eBiobot’s design and component integration for robustness, speed, and operability. Mattia Gazzola, a professor of mechanical science and engineering in Illinois, led the simulation and design of the eBiobot. The iterative design of the scaffold and his additive 3D printing enabled a rapid cycle of experimentation and performance improvement, says Gazzola and co-first author, who is a postdoctoral researcher in Gazzola’s lab. Xiaotian Zhang said.
The eBiobot is the first wireless bio-hybrid machine that combines living tissue, microelectronics and 3D printed soft polymers.
Image courtesy of Kim Young-deok
This design allows for the future integration of additional microelectronics, such as chemical and biological sensors, or 3D-printed scaffolding parts for functions such as pushing or transporting anything the biobot encounters. co-author Youngdeok Kim said. A graduate student in Illinois.
By integrating electronic sensors and biological neurons, the eBiobots could sense and respond to environmental toxins, disease biomarkers, and more, researchers say.
“By developing the first-ever hybrid bioelectronic robot, we are entering a new paradigm of applications for healthcare innovation, such as in situ biopsy and analysis, minimally invasive surgery, and even cancer detection within the human body. It opens the door for the world,” said Li. Said.
Original: Microelectronics let researchers remotely control biological robots
Than: University of Illinois at Urbana-Champaign | Northwestern University
