New robot does 'the worm' when temperature changes

New robot does 'the worm' when temperature changes
A new gelatinous robot that crawls, powered by nothing more than temperature change and clever design, brings “a kind of intelligence” to the field of soft robotics. Credit: Aishwarya Pantula/Johns Hopkins University

A new gelatinous robot that crawls, powered by nothing more than temperature change and clever design, brings "a kind of intelligence" to the field of soft robotics.

The inchworm-inspired work is detailed today in Science Robotics.

"It seems very simplistic but this is an object moving without batteries, without wiring, without an external power supply of any kind—just on the swelling and shrinking of gel," said senior author David Gracias, a professor of chemical and at Johns Hopkins University.

"Our study shows how the manipulation of shape, dimensions and patterning of gels can tune morphology to embody a kind of intelligence for locomotion."

Soft robots made of hydrogel are made to crawl during temperature changes. Credit: Aishwarya Pantula/Johns Hopkins University

Robots are made almost exclusively of like metals and plastics, a fundamental obstacle in the push to create robots ideal for human biomedical advancements.

Water-based gels, which feel like gummy bears, are one of the most promising materials in the field of soft robotics. Researchers have previously demonstrated that gels that swell or shrink in response to temperature can be used to create smart structures.

Soft robots made of hydrogel are made to crawl with temperature change. Credit: Aishwarya Pantula/Johns Hopkins University

Here, the Johns Hopkins team demonstrated for the first time, how swelling and shrinking of gels can be strategically manipulated to move robots forward and backward on , or to essentially have them crawl in certain directions with an undulating, wave-like motion.

The gelbots, which were created by 3D printing for this work, would be easy to mass produce. Gracias foresees a range of practical future applications, including moving on surfaces through the to deliver targeted medicines. They could also be marine robots, patrolling and monitoring the ocean's surface.

New robot does 'the worm' when temperature changes
Gel robots feel like gummy bears. Credit: Aishwarya Pantula/Johns Hopkins University

Gracias hopes to train the gelbots to crawl in response to variations in human biomarkers and biochemicals. He also plans to test other worm and marine organism-inspired shapes and forms and would like to incorporate cameras and sensors on their bodies.

More information: Aishwarya Pantula et al, Untethered unidirectionally crawling gels driven by asymmetry in contact forces, Science Robotics (2022). DOI: 10.1126/scirobotics.add2903. www.science.org/doi/10.1126/scirobotics.add2903

Journal information: Science Robotics
Citation: New robot does 'the worm' when temperature changes (2022, December 14) retrieved 25 February 2024 from https://techxplore.com/news/2022-12-robot-worm-temperature.html
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