AI News, Graphene Paper Transforms Into Tiny Origami Robots
Graphene Paper Transforms Into Tiny Origami Robots
A tiny sheet of graphene “paper” smaller than a human fingernail can behave like anorigami robot that folds and walks on command.
Demonstrations of the origami bots included graphene paper scooting across a surface like an inchworm, a tiny self-folding box, and a small graphene hand engineered with knuckle joints so that it couldgraspan object.
All the graphene paper movement wasactivated by either laser light or heat thattriggered contractions in certain parts of the graphene sheet, say the Donghua University team that animated the strips of carbon.They detailed their efforts in a paper published in the6 November2015 online issue of the journal Science Advances.
Left unmolested, the GO-PDA layers would remain flat because they were swollen with water molecules.But when light or heat was applied,the GO-PDA layers would release the water molecules, causing it to shrink and forcing the layers of rGO that formed the rest of the graphene paper to bend.
“We thought it would be more interesting that an origami device not only folds itself, but also can move on its own, likean origami crane can fly or an origami dragon can walk,” Wang said.“This would be an embryo of anovel kind of robot, in our opinion.” It took barely 200 milliseconds for the sheet programmed to become abox to respondto near-infrared laser light and begin folding up.
Wang envisions suchwork aiding“development of next-generation industrial mechanical actuators” and leading to new types of remotely-controlled microrobots, microfluidic chemical analysis, tissue engineering, and artificial muscles.
The flatpack that folds itself: Scientists create tiny origami graphene paper that can turn into a box, grab objects and even walk
The researchers were able to get the graphene to move along a surface using a similar motion to a worm. They also created a tiny, self-folding box as well as a small graphene hand that could grab objects.
'The bending behaviour of this paper is programmable so that we can use it to make this device walk and turn - and fold into designed shapes - simply remote-controlled by gentle light or heat,' said Hongzhi Wang, a materials scientist and engineer at Donghua University told IEEE Spectrum.
'This would be an embryo of a novel kind of robot, in our opinion.' As well as robots, such material could create 'smart clothing' that is able to change shape dependent on the environment.
'Therefore we are also interested in developing a nano-sized, all-graphene origami device.' Scientists have attempting to create tiny, origimi robots in the past. In July, for instance, a team from MIT's Computer Science and Artificial Intelligence Laboratory and the Technische Universität München designed a self-folding robot that was just two thirds of an inch (1.7cm) in length.
The robot was made from a sheets of PVC and laser-cut layers of polystyrene and paper with a magnet inside it. Once heated, it folded into an origami shape in less than a minute. In a video, the robot can be seen zipping around at speeds of one-and-a-half inches (between three and four centimetres) per second, swimming, climbing slopes and pushing double its weight, by vibrating.
Self-Folding Minirobots Possible with Origami-Inspired Graphene
Origami-inspired graphene paper that can fold itself could be used to create anything from miniature robots to artificial muscles, according to a new study.
Scientists from Donghua University in China have demonstrated that gently heating a sheet of graphene paper, which is extraordinarily strong (about 200 times stronger than steel by weight), could make it fold into a device that is able to walk forward and backward.
The research could help scientists develop self-folding structures and devices for modern applications, including wirelessly controlled micro robots, artificial muscles and devices for tissue engineering, said Jiuke Mu, a Ph.D.
Mu told Live Science, giving the example of smart clothing, "which could change its shape and style in response to body temperature, environmental changes or other gentle stimulations.”
Careful placement of these treated sections made it possible to create various self-folding objects, including the walking device, a self-assembling box and an artificial hand that can grasp and hold objects five times heavier than itself.
The researchers determined the 3D shape into which the paper folds simply by altering the placement and width of the specially treated areas, with wider sections bending more than narrower ones.
The caterpillarlike walking device was created by building a rectangular sheet of graphene paper with three treated bands running across it that got progressively wider from front to back.
Self-folding materials have become a major topic of research in recent years, with particular focus on so-called active polymers, materials that convert other forms of energy into mechanical work.
The researchers used GO nanosheets as building blocks to construct larger sheets before carrying out what's known as a reduction reaction to remove oxygen atoms from the GO.
Folding Graphene Like Origami May Allow Us To Wear Sensors In Our Skin
Material scientists have found a way to apply the ancient art of kirigami –
The material, first produced in the lab in 2003, has impressive electrical, thermal and mechanical properties, which makes it potentially useful in applications ranging from new electronic devices to additives in paints and plastics.
gold pad (the dark square which measures a few 10’s of microns) is being pushed by a micromanipulator and is attached to a graphene spring By using a sophisticated measuring technique, where an infrared laser is used to apply pressure to the gold pad on the graphene film, it is possible to measure the level of displacement of the graphene film.
Using photolithography, a method of transferring geometric shapes on a mask to a surface, as the “cutting scissors”, the team showed that it is possible to create a series of springs, hinges and stretchable graphene transistors.
Working in a water and soap solution, large sheets of graphene can dramatically crumpled like soft paper, and return to their original shape This ability to maintain graphene’s electrical properties is down to its lattice structure, which does not undergo much change during the stretching of the spring.
For example, by replacing the gold pads with a ferromagnetic material, such as iron, the sheets could be manipulated in a magnetic field, creating complex motions such as twists.
Being able to create new metamaterials, engineered to have properties not usually found in natural materials, could open the door to many new types of tools.
Stretchable electrodes would allow highly conformable or flexible electronics and sensors to be incorporated into synthetic skin or flesh, such as in robots or artificial limbs, while retaining full functionality.