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•WHAT is Transient Electronics?
•HOW are Transient Electronics made
•HOW can Transient Electronics b used
•WHERE can we use such Electronics?
•Transient devices are
enviromental friendly and
• they have promising
devices and others.
• nanomembranes are thin enough to dissolve in a few days or
weeks, depending on their thickness, in only a few droplets of water.
•Yet they are thick enough to enable high-quality semiconductor
devices, such as transistors, diodes and others.
• The devices are encapsulated in layers of silk, collected from
silkworm cocoons, dissolved and recrystallized.
• By carefully controlling the crystal structure of the silk, the
researchers can control the dissolution rate
What does magnesium replace in the circuit?
Copper or aluminum — it is the conductor. Its conductivity is not quite
as good as copper's, so you take a slight hit there, but it's water-soluble.
It is also a common ingredient in multivitamin tablets, so it's another
type of material that's good for circuits and probably not bad for the
Three application areas appear particularly
• First are medical implants that perform important diagnostic
or therapeutic functions for a useful amount of time and then
simply dissolve and reabsorb in the body.
WHAT do these circuits do?
•These circuits are designed to mitigate the effects of surgical site
•to treat them with transient electronics in the form of a kind of
appliqué that goes into the body at the site of the surgery just before
the patient is sewn up.
•It heats the site of the surgery about 5 degrees centigrade — a change
in temperature that is sufficient to kill bacteria
•Once the wound is healed the circuit reabsorbs in the body as
it dissolves in the bio fluids.
•The circuits gets power wirelessly. device has a special antenna built into
it, and we can expose it to radio-frequency radiation from an external
source through the skin. That energy can power the heater device.
• Second are environmental
monitors, such as wireless
sensors that are dispersed
after a chemical spill, that
degrade over time to
eliminate any ecological
•Third are consumer
electronic systems or sub-
components that are
compostable, to reduce
electronic waste streams
generated by devices that
are frequently upgraded,
such as cellphones or other
John Rogers, the University of Illinois at Urbana-Champaign
professor project head:
it’s a new concept, so there are lots of opportunities, many of
which we probably have not even identified yet. These findings
open up entirely new areas of application, and associated
directions for research in electronics.”
• Transient electronics offer robust performance
comparable to current devices but they will fully
reabsorb into their environment at a prescribed
time ranging from minutes to years, depending on
•devices that could change the way we think of
our gadgets, as well as introduce new capabilities
for medical implants and even spy gear.