“The encapsulated rubidium then oxidises vigorously, releasing heat to vaporise the polycarbonate shell and decompose the sodium bifluoride. Ved Gund led the research as a graduate student in the Cornell SonicMEMS Lab, and said the thermal reaction can be triggered remotely by using radio waves to open graphene-on-nitride valves that keep the chemicals sealed in the cavities. The advance from Cornell is said to use a silicon-dioxide microchip attached to a polycarbonate shell that contains microscopic cavities filled with rubidium and sodium biflouride, chemicals that can thermally react and decompose the microchip. Others disintegrate when they reach a specific temperature, requiring a heating element and power source to be attached. No harmful by-products are released upon vaporisation, so engineers from Cornell University and Honeywell Aerospace foresee biomedical and environmental applications along with data protection.Īccording to Cornell, some transient electronics use soluble conductors that dissolve when contacted by water, requiring the presence of moisture. This ability to self-destruct is fundamental to transient electronics, in which key portions of a circuit, or the whole circuit itself, can discreetly disintegrate or dissolve. Engineers have developed a new way of triggering electronic circuits to self-destruct, an advance that could help protect sensitive data and one day be used in biomedicine.
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