ACS Photonics,
Journal Year:
2024,
Volume and Issue:
11(8), P. 3239 - 3249
Published: July 15, 2024
Metal
thin
films
on
soft
polymers
provide
a
unique
opportunity
for
resistance-based
strain
sensors.
A
mechanical
mismatch
between
the
conductive
film
and
flexible
substrate
causes
cracks
to
open
close,
changing
electrical
resistance
as
function
of
strain.
However,
very
randomness
formation,
shape,
length,
orientation,
distance
adjacent
limits
sensing
range
well
repeatability.
Herein,
we
present
breakthrough:
Zerogap
sensor
(ZSS),
whereby
lithography
eliminates
violent
tearing
process
inherent
in
conventional
crack
sensors
allows
short
periodicity
gaps
with
gentle
sidewall
contacts,
critical
high
enabling
operation
over
an
unprecedentedly
wide
range.
Our
achieves
gauge
factor
15,000
at
external
εext
=
18%,
highest
known
value.
With
uniform
four-to-ten
thousand
nanometer
widths
characterized
by
strain,
this
approach
has
far
reaching
implications
future
whose
is
limited
only
that
substrate,
non-violent
operations
always
remain
below
tensile
limit
metal.
International Journal of Extreme Manufacturing,
Journal Year:
2024,
Volume and Issue:
6(6), P. 062003 - 062003
Published: July 20, 2024
Abstract
Triboelectric
nanogenerators
(TENGs)
stand
at
the
forefront
of
energy
harvesting
innovation,
transforming
mechanical
into
electrical
power
through
triboelectrification
and
electrostatic
induction.
This
groundbreaking
technology
addresses
urgent
need
for
sustainable
renewable
solutions,
opening
new
avenues
self-powered
systems.
Despite
their
potential,
TENGs
face
challenges
such
as
material
optimization
enhanced
triboelectric
effects,
scalability,
improving
conversion
efficiency
under
varied
conditions.
Durability
environmental
stability
also
pose
significant
hurdles,
necessitating
further
research
towards
more
resilient
Nature
inspired
TENG
designs
offer
promising
solutions
by
emulating
biological
processes
structures,
mechanisms
plants
textured
surfaces
animal
skins.
biomimetic
approach
has
led
to
notable
improvements
in
properties,
structural
designs,
overall
performance,
including
robustness.
The
exploration
bio-inspired
unlocked
possibilities
harvesting,
sensing,
wearable
electronics,
emphasizing
reduced
consumption
increased
innovative
design.
review
encapsulates
advancements
nature
TENGs,
highlighting
integration
principles
overcome
current
limitations.
By
focusing
on
augmented
biodegradability,
self-healing
capabilities,
pave
way
versatile
solutions.
Materials Horizons,
Journal Year:
2024,
Volume and Issue:
11(20), P. 5070 - 5080
Published: Jan. 1, 2024
Soft
and
stretchable
strain
sensors
have
found
wide
applications
in
health
monitoring,
motion
tracking,
robotic
sensing.
There
is
a
growing
demand
for
amphibious
environments,
such
as
implantable
sensors,
wearable
swimmers/divers,
underwater
sensors.
However,
developing
sensitive,
stretchable,
robust
sensor
remains
challenging.
This
work
presents
an
encapsulated
sensor.
The
conductive
layer,
made
of
silver
nanowires
embedded
below
the
surface
polydimethylsiloxane,
was
sandwiched
by
two
layers
thermoplastic
polyurethane.
Periodic
sharp
cuts
were
introduced
to
change
direction
flow
from
across
along
path
defined
opening
cracks.
crack
advancing
controlled
unique
combination
weak/strong
interfaces
within
sandwich
structure.
cut
design
interfacial
interactions
between
investigated.
exhibited
high
gauge
factor
up
289,
linear
sensing
response,
fast
response
time
(53
ms),
excellent
robustness
against
over-strain,
stability
after
16
000
loading
cycles
20
days
aqueous
saline
solution.
functionality
this
demonstrated
tracking
fish,
undertaking
language
recognition
underwater,
monitoring
blood
pressure
porcine
aorta.
illustrates
promising
potential
both
use
surgically
applications.
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 15, 2025
The
rapid
development
of
wearable
technology,
flexible
electronics,
and
human–machine
interaction
has
brought
about
revolutionary
changes
to
the
fields
motion
analysis
physiological
monitoring.
Sensors
for
detecting
human
signals
have
become
a
hot
topic
current
research.
Inspired
by
muscle
fiber
structure,
this
paper
proposed
highly
stable
strain
sensor
that
was
composed
stretchable
Spandex
fibers
(SPF),
multiwalled
carbon
nanotubes
(MWCNTs),
silicone
rubber
(Ecoflex).
This
adopted
an
immersion
coating
process
in
which
MWCNTs
were
conformally
deposited
on
SPF,
Ecoflex
filled
into
interstices,
completing
encapsulation
filling
SPF
construct
three-dimensional
conductive
network.
Thanks
Ecoflex,
contact
between
during
stretching
avoided,
resulting
significant
change
resistance.
sensitivity
reached
54.84,
is
10
times
higher
than
before
with
range
up
70%.
also
prevented
detachment
stretching,
improving
mechanical
stability.
can
be
easily
attached
surface
skin
rapidly
monitor
various
signals.
Furthermore,
related
manipulator
through
wireless
Bluetooth
realize
intelligent
control
manipulator.
work
not
only
provided
more
precise
data
monitoring
method
medical
but
offered
innovative
solution
control.
