ACS Sensors,
Journal Year:
2024,
Volume and Issue:
9(12), P. 6833 - 6843
Published: Nov. 14, 2024
Ionic
conductive
hydrogel-based
temperature
sensors
have
emerged
as
promising
candidates
due
to
their
good
stretchability
and
biocompatibility.
However,
the
unsatisfactory
sensitivity,
sluggish
response/recovery
speed,
poor
environmental
stability
limit
applications
for
accurate
long-term
health
monitoring
robot
perception,
especially
in
extreme
environments.
To
address
these
concerns,
here,
stretchable
based
on
a
double-side
elastomer-encapsulated
thin-film
organohydrogel
(DETO)
architecture
are
proposed
with
impressive
performance.
It
is
found
that
water–polyol
binary
solvent,
film,
sandwiched
device
structure
play
important
roles
sensing
By
modifying
composition
of
solvent
thicknesses
elastomer
films,
DETO
microsensors
realize
thickness
only
380
μm,
unprecedented
sensitivity
(37.96%/°C),
fast
response
time
(6.01
s)
recovery
(10.53
s),
wide
detection
range
(25–95.7
°C),
(40%
strain),
which
superior
those
conventional
sensors.
Furthermore,
displays
negligible
dehydration
prolonged
operation
duration.
With
attributes,
wearable
sensor
exploited
real-time
various
physiological
signals
such
human
skin
respiration
patterns
well
perception
robots.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 26, 2024
Abstract
Wearable
strain
sensors,
capable
of
continuously
detecting
human
movements,
hold
great
application
prospects
in
sign
language
gesture
recognition
to
alleviate
the
daily
communication
barriers
deaf
and
mute
community.
However,
unsatisfactory
sensing
performance
(such
as
low
sensitivity,
narrow
detection
range,
etc.)
wearing
discomfort
severely
hinder
their
practical
application.
Here,
high‐performance
breathable
hydrogel
sensors
are
proposed
by
introducing
an
adjustable
localized
crack
a
closed‐loop
connected
fiber
encapsulated
porous
elastomer
films.
Upon
loading/unloading
external
strain,
dynamic
opening/closing
pre‐cut
causes
rapid
switching
conductive
path,
resulting
sharp
changes
resistance
high
sensitivity.
Consequently,
hydrogel‐based
crack‐effect
sensor
exhibits
superb
sensitivity
(GF
up
3930),
broad
range
(from
0.02%
80%),
fast
response/recovery
time
(78/52
ms),
repeatability,
structural
stability.
Based
on
capability
accurately
detect
various
strains
across
full
wireless
system
is
developed
achieve
accuracy
98.1%
encoding
decoding
gestures
with
assistance
machine
learning,
providing
robust
platform
for
efficient
intelligibility
barrier‐free
communication.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 5, 2025
Abstract
Stretchable
multimodal
electronic
skin
(e‐skin)
has
attracted
intensive
research
interest
but
faces
great
challenges
related
to
strain
interference,
crosstalk
issues,
and
integration
of
multiple
sensitive
materials.
Herein,
a
stretchable
strain‐isolated
(SSIM)
e‐skin
capable
concurrently
sensitively
monitoring
temperature,
humidity,
UV
light,
oxygen,
while
also
possessing
self‐compensation
capability
is
developed.
The
SSIM
sensing
platform
created
by
chemically
anchoring
polyethylene
terephthalate
onto
polydimethylsiloxane
through
silane
treatment
form
island‐bridge
structures.
This
method
effectively
isolates
improves
interfacial
adhesion,
achieving
state‐of‐the‐art
low
interference
0.2%
an
adhesion
energy
exceeding
300
J
m
−
2
(13.4
times
that
the
untreated
material),
ensuring
e‐skin's
stable
operation
even
under
dynamic
stretching.
To
mitigate
fabrication
complexity,
single
hydrogel
film
employed
facilitate
self‐compensating
various
mechanisms
physical
isolations.
can
simultaneously
monitor
several
environmental
physiological
signals
with
minimized
without
from
body
movements.
It
enables
remote
respiration
wireless
circuitry,
highlighting
its
substantial
potential
in
health
monitoring,
medical
diagnostics,
neurorehabilitation.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 30, 2025
Abstract
In
the
wake
of
COVID‐19
pandemic,
there
is
an
increased
demand
for
humidity
sensors
that
can
accurately
detect
targets
without
direct
contact,
driving
advancements
in
contactless
human‐machine
interaction
(HMI)
and
non‐invasive
medical
diagnostics.
However,
it
difficult
traditional
individual
to
acquire
field
information
reliable
HMI.
Here,
ionogel
film‐based
flexible
fast‐response
sensing
array
developed
via
a
scalable,
efficient,
modified
spin‐coating‐based
fabrication
strategy
accurate
detection
distribution.
By
optimizing
structure
constitution
hydrophobic
films,
display
ultrafast
response
recovery
time
(0.65/0.85
s),
broad
range
(11‐98%
RH),
long‐term
stability
(120
days),
excellent
repeatability,
flexibility,
environmental
tolerances.
Thanks
one‐time
scalable
fabrication,
units
exhibit
superior
uniformity,
as
device‐to‐device
deviation
reduced
one‐ninth
compared
multi‐batch
methods.
With
aid
machine
learning
algorithms,
this
realizes
not
only
identification
various
subtle
breath
abnormalities
(e.g.,
oral
breathing,
apnea,
left
right
nasal
congestions)
by
conformally
attaching
wearable
masks,
but
also
precise
HMI
applications
anti‐interference
gesture
recognition
wireless
control
intelligent
executive
terminals).
