A crew of College of Waterloo researchers has created good, superior supplies that would be the constructing blocks for a future era of soppy medical microrobots.
These tiny robots have the potential to conduct medical procedures, akin to biopsy, and cell and tissue transport, in a minimally invasive vogue. They will transfer by way of confined and flooded environments, just like the human physique, and ship delicate and lightweight cargo, akin to cells or tissues, to a goal place.
The tiny mushy robots are a most of 1 centimetre lengthy and are bio-compatible and non-toxic. The robots are product of superior hydrogel composites that embody sustainable cellulose nanoparticles derived from vegetation.
This analysis, led by Hamed Shahsavan, a professor within the Division of Chemical Engineering, portrays a holistic strategy to the design, synthesis, fabrication, and manipulation of microrobots. The hydrogel used on this work modifications its form when uncovered to exterior chemical stimulation. The flexibility to orient cellulose nanoparticles at will permits researchers to program such shape-change, which is essential for the fabrication of purposeful mushy robots.
“In my analysis group, we’re bridging the previous and new,” mentioned Shahsavan, director of the Sensible Supplies for Superior Robotic Applied sciences (SMART-Lab). “We introduce rising microrobots by leveraging conventional mushy matter like hydrogels, liquid crystals, and colloids.”
The opposite distinctive element of this superior good materials is that it’s self-healing, which permits for programming a variety within the form of the robots. Researchers can reduce the fabric and paste it again collectively with out utilizing glue or different adhesives to kind completely different shapes for various procedures.
The fabric may be additional modified with a magnetism that facilitates the motion of soppy robots by way of the human physique. As proof of idea of how the robotic would maneuver by way of the physique, the tiny robotic was moved by way of a maze by researchers controlling its motion utilizing a magnetic area.
“Chemical engineers play a vital position in pushing the frontiers of medical microrobotics analysis,” Shahsavan mentioned. “Curiously, tackling the numerous grand challenges in microrobotics requires the skillset and information chemical engineers possess, together with warmth and mass switch, fluid mechanics, response engineering, polymers, mushy matter science, and biochemical programs. So, we’re uniquely positioned to introduce progressive avenues on this rising area.”
The subsequent step on this analysis is to scale the robotic all the way down to submillimeter scales.
Shahsavan’s analysis group collaborated with Waterloo’s Tizazu Mekonnen, a professor from the Division of Chemical Engineering, Professor Shirley Tang, Affiliate Dean of Science (Analysis), and Amirreza Aghakhani, a professor from the College of Stuttgart in Germany.
