6/20/2023 0 Comments China technology sticky putty![]() He continued, “While a common application has been to add graphene to plastics in order to improve the electrical, mechanical, thermal or barrier properties, the resultant composites have generally performed as expected without any great surprises. Unusually, the resistance slowly returned close to its original value as the putty self-healed over time.” The electrical resistance of the G-putty was very sensitive to deformation with the resistance increasing sharply on even the slightest strain or impact. When we added the graphene to the silly putty, it caused it to conduct electricity, but in a very unusual way. It is different from familiar materials in that it flows like a viscous liquid when deformed slowly but bounces like an elastic solid when thrown against a surface. This material as well known as the children’s toy silly putty. Prof Coleman said, “What we are excited about is the unexpected behaviour we found when we added graphene to the polymer, a cross-linked polysilicone. Jonathan Coleman is with his graphene-putty alongside his son Oisin, trying out the novelty children’s material silly putty. It is believed that this material will find applications in a range of medical devices. The G-putty also works as a very sensitive impact sensor, able to detect the footsteps of small spiders. It showed unprecedented sensitivity as a sensor for strain and pressure, hundreds of times more sensitive than normal sensors. They mounted the G-putty onto the chest and neck of human subjects and used it to measure breathing, pulse and even blood pressure. ![]() Prof Coleman, Investigator in AMBER and Trinity’s School of Physics along with postdoctoral researcher Conor Boland, discovered that the electrical resistance of putty infused with graphene (“G-putty”) was extremely sensitive to the slightest deformation or impact. The AMBER team’s findings have been published this week in the leading journal Science*. This world first research, led by Professor Jonathan Coleman from TCD and in collaboration with Prof Robert Young of the University of Manchester, potentially offers exciting possibilities for applications in new, inexpensive devices and diagnostics in medicine and other sectors. Researchers in AMBER, the Science Foundation Ireland-funded materials science research centre, hosted in Trinity College Dublin, have used the wonder material graphene to make the novelty children’s material silly putty® (polysilicone) conduct electricity, creating extremely sensitive sensors. ![]()
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