Various
flexible
electrodes
have
been
developed
to
fulfill
the
requirements
of
electrophysiological
monitoring.
A
key
feature
these
is
their
conformal
and
seamless
contact
with
tissues
or
skins.
Such
usually
difficult
achieve
when
detecting
signals
from
hairy
skins,
e.g.,
electroencephalogram
(EEG)
head
without
shaving
hairs
noninvasive
detection
animal
signals.
Herein,
address
this
problem,
a
composite
paste
electrode
by
mixing
polymer
matrix
conductive
nanofillers.
The
can
conformally
coat
smooth
rough
surfaces
adequate
adhesion
function
collect
It
records
signal-to-noise
ratios
comparable
those
commercial
patch
electrodes.
With
electrode,
direct
electrocardiogram
(ECG)
rabbit
skin
realized,
which
conducted
invasive
needle
High-quality
EEG
also
be
collected
areas
dense
hair,
simplifying
detection.
This
provides
convenient
comfortable
for
applications
monitoring
on
surfaces.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(35)
Published: June 21, 2024
Real-time
continuous
monitoring
of
non-cognitive
markers
is
crucial
for
the
early
detection
and
management
chronic
conditions.
Current
diagnostic
methods
are
often
invasive
not
suitable
at-home
monitoring.
An
elastic,
adhesive,
biodegradable
hydrogel-based
wearable
sensor
with
superior
accuracy
durability
real-time
human
health
developed.
Employing
a
supramolecular
engineering
strategy,
pseudo-slide-ring
hydrogel
synthesized
by
combining
polyacrylamide
(pAAm),
β-cyclodextrin
(β-CD),
poly
2-(acryloyloxy)ethyltrimethylammonium
chloride
(AETAc)
bio
ionic
liquid
(Bio-IL).
This
novel
approach
decouples
conflicting
mechano-chemical
effects
arising
from
different
molecular
building
blocks
provides
balance
mechanical
toughness
(1.1
×
10
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(32)
Published: May 6, 2024
Abstract
Conductive
hydrogels
are
gaining
significant
attention
as
promising
candidates
for
the
fabrication
materials
flexible
electronics.
Nevertheless,
improving
tensile
properties,
hysteresis,
durability,
adhesion,
and
electrochemical
properties
of
these
remains
challenging.
This
work
reports
development
a
novel
semi‐interpenetrating
network
poly(ionic
liquid)
hydrogel
named
PATV,
via
in
situ
polymerization
acrylamide,
N
‐[Tris(hydroxymethyl)methyl]
1‐vinyl‐3‐butylimidazolium
tetrafluoroborate.
The
density
functional
theory
calculations
reveal
that
acts
physical
cross–linking
points
to
construct
hydrogen‐bond
networks.
Furthermore,
networks
dissipate
energy
efficiently
quickly,
thus
stress
concentration
hysteresis
avoided.
prepared
has
low
(9%),
high
(900%),
fast
response
(180
ms),
sensitivity
(gauge
factor
=
10.4,
pressure
0.14
kPa
−1
),
wide
sensing
range
(tensile
range:
1–600%,
compression
0.1–20
kPa).
A
multifunctional
sensor
designed
based
on
enables
real‐time,
rapid,
stable
response‐ability
detection
human
movement,
facial
expression
recognition,
pronunciation,
pulse,
handwriting,
Morse
code
encryption.
assembled
triboelectric
nanogenerator
displays
an
excellent
harvesting
capability,
highlighting
its
potential
application
self‐powered
wearable
electronic
devices.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(23)
Published: Feb. 29, 2024
Abstract
Hydrogels
are
considered
as
promising
materials
for
human‐machine
interfaces
(HMIs)
owing
to
their
merits
of
tailorable
mechanical
and
electrical
properties;
nevertheless,
it
remains
challenging
simultaneously
achieve
ultrasoftness,
good
robustness
high
sensitivity,
which
the
pre‐requisite
requirements
wearable
sensing
applications.
Herein,
first
time,
this
work
proposes
a
universal
phase‐transition‐induced
bubbling
strategy
fabricate
ultrasoft
gradient
foam‐shaped
hydrogels
(FSHs)
with
stop
holes
deformability,
crack‐resistance
sensitive
conformal
HMIs.
As
typical
system,
FSH
based
on
polyacrylamide/sodium
alginate
system
shows
an
ultralow
Young's
modulus
(1.68
kPa),
increased
sustainable
strain
(1411%),
enhanced
fracture
toughness
(915.6
J
m
−2
),
improved
tensile
sensitivity
(21.77),
compressive
(65.23
kPa
−1
).
The
FSHs
used
precisely
acquiring
identifying
gesture
commands
operator
remotely
control
surgical
robot
endoscopy
electric
ship
in
first‐person
perspective
cruising,
feeding
crabs
monitoring
environmental
change
real‐time.
Journal of Materials Chemistry B,
Journal Year:
2024,
Volume and Issue:
12(28), P. 6940 - 6958
Published: Jan. 1, 2024
Conductive
hydrogels
(CHs)
with
high
sensitivity
and
multifunctional
property
are
considered
as
excellent
materials
for
wearable
devices
flexible
electronics.
Surface
synapses
internal
multilayered
structures
key
factors
highly
sensitive
pressure
sensors.
Nevertheless,
current
CHs
lack
environmental
adaptability,
perception,
instrument
portability,
which
seriously
hinders
their
application
Here,
waste
collagen
fibers
(buffing
dust
of
leather),
polyvinyl
alcohol
(PVA)
gelatin
(Gel)
were
used
the
basic
framework
hydrogel,
loaded
a
conductive
material
(silver
nanoparticles
(BD-CQDs@AgNPs))
an
anti-freezing
moisturizer
(glycerol
(Gly)),
resulting
in
organohydrogel
(BPGC-Gly).
As
temperature
humidity
sensor,
it
demonstrated
response
range
(-20-60
°C)
was
capable
rapid
(2.4
s)
recovery
(1.6
to
human
breathing.
strain/pressure
allowed
real-time
monitoring
movement
had
low-pressure
(
