Langmuir,
Год журнала:
2024,
Номер
40(10), С. 5288 - 5296
Опубликована: Фев. 28, 2024
A
kind
of
ionic
conductive
gel
(also
named
eutectogel)
is
developed
from
an
inorganic
salt
(ZnCl2)-based
deep
eutectic
solvent
(DES).
The
ternary
DES
consists
ZnCl2,
acrylic
acid,
and
water,
cotton
linter
cellulose
introduced
into
the
system
to
tailor
its
mechanical
properties.
Enabled
by
extensive
hydrogen
bonds
ion–dipole
interactions,
obtained
eutectogel
displays
superior
conductivity
(0.33
S/m),
high
stretchability
(up
2050%),
large
tensile
strength
(1.82
MPa),
wide
temperature
tolerance
(−40
60
°C).
In
particular,
water-induced
coordination
interactions
can
tune
hydrogen/ionic
in
eutectogels,
imparting
them
with
appealing
humidity
sensing
ability
complex
extreme
conditions.
Nano-Micro Letters,
Год журнала:
2024,
Номер
17(1)
Опубликована: Ноя. 4, 2024
Abstract
Gas
sensor
is
an
indispensable
part
of
modern
society
with
wide
applications
in
environmental
monitoring,
healthcare,
food
industry,
public
safety,
etc.
With
the
development
technology,
wireless
communication,
smart
monitoring
terminal,
cloud
storage/computing
and
artificial
intelligence,
gas
sensors
represent
future
sensing
due
to
their
merits
real-time
multifunctional
early
warning
function,
intelligent
automated
feature.
Various
electronic
optoelectronic
have
been
developed
for
high-performance
analysis.
terminals
maturity
integrated
flexible
wearable
play
increasing
role
This
review
highlights
recent
advances
diverse
applications.
The
structural
components
fundamental
principles
are
described,
devices
highlighted.
Moreover,
array
intelligence
algorithms
“Internet
Things”
paradigm
introduced.
Finally,
challenges
perspectives
discussed
regarding
need
city
healthy
living.
Nano-Micro Letters,
Год журнала:
2025,
Номер
17(1)
Опубликована: Янв. 15, 2025
Abstract
The
proliferation
of
wearable
biodevices
has
boosted
the
development
soft,
innovative,
and
multifunctional
materials
for
human
health
monitoring.
integration
sensors
with
intelligent
systems
is
an
overwhelming
tendency,
providing
powerful
tools
remote
monitoring
personal
management.
Among
many
candidates,
two-dimensional
(2D)
stand
out
due
to
several
exotic
mechanical,
electrical,
optical,
chemical
properties
that
can
be
efficiently
integrated
into
atomic-thin
films.
While
previous
reviews
on
2D
primarily
focus
conventional
configurations
like
graphene,
rapid
new
opened
up
novel
applications,
particularly
in
smart
interaction
functionalities.
This
review
aims
consolidate
recent
progress,
highlight
unique
advantages
materials,
guide
future
research
by
discussing
existing
challenges
opportunities
applying
biodevices.
We
begin
in-depth
analysis
advantages,
sensing
mechanisms,
potential
applications
biodevice
fabrication.
Following
this,
we
systematically
discuss
state-of-the-art
based
various
physiological
signals
within
body.
Special
attention
given
showcasing
multi-functionality
devices,
mainly
including
self-power
supply,
diagnosis/treatment,
human–machine
interaction.
Finally,
concludes
a
concise
summary
prospective
solutions
concerning
utilization
advanced
Abstract
As
skin
bioelectronics
advances,
hydrogel
wearable
devices
have
broadened
perspectives
in
environment
sensing
and
health
monitoring.
However,
their
application
is
severely
hampered
by
poor
mechanical
self‐healing
properties,
environmental
sensitivity,
limited
sensory
functions.
Herein,
inspired
the
hierarchical
structure
unique
cross‐linking
mechanism
of
hagfish
slime,
a
self‐powered
supramolecular
hereby
reported,
featuring
high
stretchability
(>2800%
strain),
ultrafast
autonomous
capabilities
(electrical
healing
time:
0.3
s),
self‐adhesiveness
(adhesion
strength:
6.92
kPa),
injectability,
ease
shaping,
antimicrobial
biocompatibility.
It
observed
that
embedding
with
highly
hygroscopic
salt
LiCl
hydrogel,
not
only
showed
excellent
electrical
conductivity
but
also
presented
favorable
anti‐freezing
water
retention
properties
extremely
cold
environments
natural
settings.
Given
these
attributes,
served
as
multifunctional
durable
device
sensitivity
(gauge
factor:
3.68),
fast
response
time
(160
ms),
low
detection
limit,
frequency
sensitivity.
Moreover,
applicability
this
further
demonstrated
long‐term
sensing,
remote
medical
communication,
underwater
communication.
Overall,
findings
pave
way
for
sustainable
development
hydrogel‐based
are
self‐powered,
durable,
offer
performance,
adaptability,
multi‐sensory
capabilities.
Advanced Functional Materials,
Год журнала:
2023,
Номер
34(6)
Опубликована: Окт. 24, 2023
Abstract
Highly
sensitive
and
wearable
gas
sensors
are
highly
demanded
on
account
of
their
widespread
application
in
health
environmental
monitoring.
However,
the
sensing
performance
conventional
room‐temperature
prone
to
fluctuate
or
even
fail
under
changing
humidity,
temperature
putting
into
water,
thus
severely
limiting
practical
applications.
Herein,
a
porous
elastomer‐encapsulated
hydrogel‐based
oxygen
sensor
is
designed
with
impressive
various
conditions,
including
high
precision
(at
ppm
level),
wide
detection
range
(from
5
90%
O
2
),
excellent
repeatability,
selectivity,
long‐term
stability,
breathability,
waterproofing.
The
hydrophobic
elastomer
film
prevents
water
molecules
from
intruding
evaporating
great
extent,
making
device
resistant
humidity
interference
applicable
underwater
operation.
Benefiting
intrinsic
stretchability
both
hydrogel
films
strong
interfacial
bonding,
final
can
be
stretched
up
100%
strain.
By
integrating
wireless
circuit
module,
wearable/portable
system
for
real‐time
monitoring
environment
demonstrated,
realizing
timely
convenient
assessment
respiratory
rate,
tissue
oxygen,
ambient
dissolved
oxygen.
Biosensors,
Год журнала:
2023,
Номер
13(8), С. 823 - 823
Опубликована: Авг. 15, 2023
Hydrogel-based
wearable
electrochemical
biosensors
(HWEBs)
are
emerging
biomedical
devices
that
have
recently
received
immense
interest.
The
exceptional
properties
of
HWEBs
include
excellent
biocompatibility
with
hydrophilic
nature,
high
porosity,
tailorable
permeability,
the
capability
reliable
and
accurate
detection
disease
biomarkers,
suitable
device–human
interface,
facile
adjustability,
stimuli
responsive
to
nanofiller
materials.
Although
biomimetic
three-dimensional
hydrogels
can
immobilize
bioreceptors,
such
as
enzymes
aptamers,
without
any
loss
in
their
activities.
However,
most
suffer
from
low
mechanical
strength
electrical
conductivity.
Many
studies
been
performed
on
electroactive
nanofillers,
including
biomacromolecules,
carbon-based
materials,
inorganic
organic
nanomaterials,
tackle
these
issues.
Non-conductive
even
conductive
may
be
modified
by
well
redox
species.
All
modifications
led
design
development
efficient
nanocomposites
biosensors.
In
this
review,
both
conductive-based
non-conductive-based
derived
natural
synthetic
polymers
systematically
reviewed.
main
synthesis
methods
characterization
techniques
addressed.
behavior
discussed
detail.
Finally,
prospects
potential
applications
biosensing,
healthcare
monitoring,
clinical
diagnostics
highlighted.
ABSTRACT
Flexible
sensors
exhibit
the
properties
of
excellent
shape
adaptability
and
deformation
ability,
which
have
been
applied
for
environmental
monitoring,
medical
diagnostics,
food
safety,
smart
systems,
human–computer
interaction.
Cellulose‐based
hydrogels
are
ideal
materials
fabrication
flexible
due
to
their
unique
three‐dimensional
structure,
renewability,
ease
processing,
biodegradability,
modifiability,
good
mechanical
properties.
This
paper
comprehensively
reviews
recent
advances
cellulose‐based
in
construction
sensor
applications.
The
characteristics,
mechanisms,
advantages
prepared
by
physical
cross‐linking,
chemical
cross‐linking
respectively
analyzed
summarized
detail.
focus
then
turns
research
development
hydrogel
sensors,
including
sensing
(pressure/strain,
humidity/temperature,
optical
sensing),
(chromium,
copper,
mercury
ion
sensing,
toxic
gas
nitrite
biosensing
(glucose,
antibody,
cellular
sensing).
Additionally,
limitations
along
with
key
challenges
future
directions,
discussed.
It
is
anticipated
that
this
review
will
furnish
invaluable
insight
advancement
novel
green,
facilitate
integration
as
a
fundamental
component
multifunctional
technologies,
thereby
expediting
design
innovative
near
future.
