Scientists have developed electronic devices that may self-destroy on demand when heated, a step towards greatly reducing electronic waste and
boosting property in device manufacturing.
They also developed a radio-controlled trigger that could remotely activate self-destruction on demand. "We have demonstrated electronics that are there when you want them and gone when you do not need them anymore," same professor Scott R White from the University of Illinois.
"This is a way of making sustainability within the materials that are utilized in modern electronics. This was our initial attempt to use an environmental stimulus to trigger destruction," said White.
White's group teamed up with John A Rogers, director of the frederick Seitz Materials Laboratory at Illinois. Rogers' group has pioneered transient devices that dissolve in water, with applications for biomedical implants.
Together, the 2 research groups have tackled the problem of using other triggers to break down devices, as well as ultraviolet radiation, heat and mechanical stress. The goal is to search out ways in which to disintegrate the devices so that manufacturers can recycle costly materials from used or obsolete devices roughly that the devices might break down in a landfill, researchers said.
The heat-triggered devices use magnesium circuits printed on very thin, flexible materials. The researchers trap microscopic droplets of a weak acid in wax, and coat the devices with the wax. once the devices are heated, the wax melts, releasing the acid. The acid dissolves the device quickly and completely.
To remotely trigger the reaction, researchers embedded a radio-frequency receiver and an inductive heating coil within the device. The user can send a signal to cause the coil to heat up, that melts the wax and dissolves the device. "This work demonstrates the extent to which clever chemistries can qualitatively expand the breadth of mechanisms in transience, and thus the range of potential applications," Rogers said.
The researchers can control how fast the device degrades by tuning the thickness of the wax, the concentration of the acid, and the temperature. they can design a tool to self-destruct within twenty seconds to a few of minutes once heat is applied.
The devices can also degrade in steps by encasing different|completely different} parts in waxes with different melting temperatures. this gives more precise control over which parts of a device are operative, making possibilities for sophisticated devices that can sense something in the setting and respond to it, researchers said.
The research was published in the journal Advanced Materials.
boosting property in device manufacturing.
They also developed a radio-controlled trigger that could remotely activate self-destruction on demand. "We have demonstrated electronics that are there when you want them and gone when you do not need them anymore," same professor Scott R White from the University of Illinois.
"This is a way of making sustainability within the materials that are utilized in modern electronics. This was our initial attempt to use an environmental stimulus to trigger destruction," said White.
White's group teamed up with John A Rogers, director of the frederick Seitz Materials Laboratory at Illinois. Rogers' group has pioneered transient devices that dissolve in water, with applications for biomedical implants.
Together, the 2 research groups have tackled the problem of using other triggers to break down devices, as well as ultraviolet radiation, heat and mechanical stress. The goal is to search out ways in which to disintegrate the devices so that manufacturers can recycle costly materials from used or obsolete devices roughly that the devices might break down in a landfill, researchers said.
The heat-triggered devices use magnesium circuits printed on very thin, flexible materials. The researchers trap microscopic droplets of a weak acid in wax, and coat the devices with the wax. once the devices are heated, the wax melts, releasing the acid. The acid dissolves the device quickly and completely.
To remotely trigger the reaction, researchers embedded a radio-frequency receiver and an inductive heating coil within the device. The user can send a signal to cause the coil to heat up, that melts the wax and dissolves the device. "This work demonstrates the extent to which clever chemistries can qualitatively expand the breadth of mechanisms in transience, and thus the range of potential applications," Rogers said.
The researchers can control how fast the device degrades by tuning the thickness of the wax, the concentration of the acid, and the temperature. they can design a tool to self-destruct within twenty seconds to a few of minutes once heat is applied.
The devices can also degrade in steps by encasing different|completely different} parts in waxes with different melting temperatures. this gives more precise control over which parts of a device are operative, making possibilities for sophisticated devices that can sense something in the setting and respond to it, researchers said.
The research was published in the journal Advanced Materials.
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