Medical Design Briefs - February 2021 - 30

and they can transmit data wirelessly.
With these desirable properties, the
novel strain sensors can potentially be
used for a wide range of applications.
" Performance of conventional strain
sensors has always been limited by the
nature of sensing materials used, and
users have limited options of customizing the sensors for specific applications, "
says Chen, who is from NUS Chemical

and Biomolecular Engineering. " In this
work, we have developed a facile strategy
to control the surface textures of
MXenes, and this enabled us to control
the sensing performance of strain sensors for various soft exoskeletons. The
sensor design principles developed in
this work will significantly enhance the
performance of electronic skins and soft
robots. "

Ten times more sensitive than conventional technologies, these lightweight strain sensors can be
incorporated into rehabilitation gloves to improve their sensitivity and performance. (Credit: NUS)

■ Precision Manufacturing
One area where the novel strain sensors could be put to good use is in precision manufacturing, where robotic arms
are used to carry out intricate tasks, such
as fabricating fragile electronic products
like microchips.
These strain sensors can be coated on
a robotic arm like an electronic skin to
measure subtle movements as they are
stretched. When placed along the joints
of robotic arms, the strain sensors allow
the system to understand precisely how
much the robotic arms are moving and
their current position relative to the resting state. Current off-the-shelf strain sensors do not have the required accuracy
and sensitivity to carry out this function.
Conventional automated robotic arms
used in precision manufacturing require
external cameras aimed at them from
different angles to help track their
positioning and movement. The ultrasensitive strain sensors will help improve
the overall safety of robotic arms by providing automated feedback on precise
movements with an error margin below
one degree and remove the need for
external cameras as they can track posi-

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Medical Design Briefs, February 2021
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Medical Design Briefs - February 2021

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