Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: May 31, 2024
Abstract
The
rapid
development
of
the
Internet
Things
and
artificial
intelligence
technologies
has
increased
need
for
wearable,
portable,
self-powered
flexible
sensing
devices.
Triboelectric
nanogenerators
(TENGs)
based
on
gel
materials
(with
excellent
conductivity,
mechanical
tunability,
environmental
adaptability,
biocompatibility)
are
considered
an
advanced
approach
developing
a
new
generation
sensors.
This
review
comprehensively
summarizes
recent
advances
in
gel-based
TENGs
sensors,
covering
their
principles,
properties,
applications.
Based
requirements
working
mechanism
characteristic
advantages
gels
introduced.
Design
strategies
performance
optimization
hydrogel-,
organogel-,
aerogel-based
systematically
summarized.
In
addition,
applications
human
motion
sensing,
tactile
health
monitoring,
human–machine
interaction,
other
related
fields
Finally,
challenges
discussed,
feasible
proposed
to
guide
future
research.
Advanced Science,
Journal Year:
2023,
Volume and Issue:
10(28)
Published: Aug. 6, 2023
Hydrogels
with
tailor-made
swelling-shrinkable
properties
have
aroused
considerable
interest
in
numerous
biomedical
domains.
For
example,
as
swelling
is
a
key
issue
for
blood
and
wound
extrudates
absorption,
the
transference
of
nutrients
metabolites,
well
drug
diffusion
release,
hydrogels
high
capacity
been
widely
applicated
full-thickness
skin
healing
tissue
regeneration,
delivery.
Nevertheless,
fields
adhesives
internal
soft-tissue
healing,
bioelectronics,
non-swelling
play
very
important
functions
owing
to
their
stable
macroscopic
dimension
physical
performance
physiological
environment.
Moreover,
negative
behavior
(i.e.,
shrinkage)
can
be
exploited
drive
noninvasive
closure,
achieve
resolution
enhancement
hydrogel
scaffolds.
In
addition,
it
help
push
out
entrapped
drugs,
thus
promote
release.
However,
there
still
has
not
general
review
constructions
applications
from
viewpoint
properties.
Therefore,
this
summarizes
tactics
employed
so
far
tailoring
applications.
And
relatively
comprehensive
understanding
current
progress
future
challenge
different
features
provided
potential
clinical
translations.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(21)
Published: Feb. 27, 2023
Abstract
It
is
essential
and
of
great
significance
to
impart
high
mechanical
performance,
environmental
stability,
sensitivity
emerging
flexible
temperature
sensors.
In
this
work,
polymerizable
deep
eutectic
solvents
are
designed
prepared
by
simply
mixing
N‐cyanomethyl
acrylamide
(NCMA)
containing
an
amide
group
a
cyano
in
the
same
side
chain
with
lithium
bis(trifluoromethane)
sulfonimide
(LiTFSI),
obtain
supramolecular
polyNCMA/LiTFSI
gels
after
polymerization.
These
exhibit
excellent
performance
(tensile
strength
12.9
MPa
fracture
energy
45.3
kJ
m
−2
),
strong
adhesion
force,
high‐temperature
responsiveness,
self‐healing
ability,
shape
memory
behavior
due
reversible
reconstruction
ability
hydrogen
bonds
cyano‐cyano
dipole‐dipole
interactions
gel
network.
addition,
also
demonstrate
good
stability
3D
printability.
To
verify
its
application
potential
as
sensor,
gel‐based
wireless
monitor
developed
displays
outstanding
thermal
(8.4%/K)
over
wide
detection
range.
The
preliminary
result
suggests
promising
PNCMA
pressure
sensor.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(28)
Published: Feb. 10, 2023
Abstract
The
emergence
of
plastic
electronics
satisfies
the
increasing
demand
for
flexible
electronics.
However,
it
has
caused
severe
ecological
problems.
Flexible
based
on
natural
materials
are
to
hopefully
realize
“green”
and
eco‐friendly
concept.
Herein,
recent
advances
in
design
fabrication
green
reviewed.
First,
this
review
comprehensively
introduces
various
derivatives,
focusing
particularly
fibroin
silk,
wood
paper,
plants,
biomass.
Second,
techniques
modifying
materials,
including
physical
chemical
methods,
presented,
after
which
their
merits
demerits
thoroughly
discussed.
Green
comprising
electrical
wires/electrodes,
antennas,
thermal
management
devices,
transistors,
memristors,
sensors,
energy‐harvesting
energy‐storage
displays,
actuators,
electromagnetic
shielding,
integration
systems,
described
detail.
Finally,
perspectives
existing
challenges
opportunities
employ
presented.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(15)
Published: Feb. 7, 2023
Abstract
The
conductive
hydrogels
always
suffered
from
high
internal
friction,
large
hysteresis,
and
low
capability
of
accurately
predicting
physical
deformation,
which
seriously
restricted
their
application
in
smart
wearable
devices.
To
address
these
problems,
solvent
molecules
are
directionally
inserted
into
the
polymer
molecule
chains
via
bridge
effect
to
effectively
reduce
molecular
friction.
Moreover,
swelling
is
also
combined
eliminate
temporary
entanglements
hydrogel
system.
cooperation
between
swollen
endows
prepared
polyacrylamide
(PAM)/laponite/H
3
BO
/ethylene
glycol
(Eg)
organohydrogel
(PLBOH)
ultralow
hysteresis
(1.38%,
ε
=
100%),
ultrafast
response
(≈10
ms),
linearity
whole‐strain‐range
(
R
2
0.996)
with
a
great
sensitivity
GF
2.68
at
strain
range
0–750%).
Meanwhile,
PL
10
B
30
OH
exhibits
long‐term
stability,
excellent
stretchability,
dissipated
energy.
Furthermore,
assembled
triboelectric
nanogenerator
(TENG)
displays
an
outstanding
energy
harvesting
performance
output
voltage
200
V
size
20
mm
×
mm.
sensors
can
monitor
small
facial
expressions
human
movements,
indicating
tremendous
applications
self‐powered
intelligent
flexible
electronics
under
harsh
environmental
conditions.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(29)
Published: March 31, 2023
Advances
in
emerging
technologies
for
wireless
collection
and
the
timely
analysis
of
various
information
captured
by
wearable
devices
are
growing
interest.
Herein,
a
crosslinked
ionic
hydrogel
prepared
facile
photocuring
process
is
proposed,
which
allows
to
be
further
incorporated
into
two
integrated
systems
pressure
monitoring
applications.
The
device
exhibits
simplified
structure
effectively
sharing
functional
layers,
rather
than
conventional
separate
combinations,
offering
salient
performance
iontronic
sensing
electrochromic
properties
simultaneously
quantify
visualize
pressure.
developed
smart
patch
system
demonstrated
monitor
physiological
signals
real-time
utilizing
user
interface
remote
portable
equipment
with
Bluetooth
protocol
on-site
displays.
Moreover,
passive
based
on
magnetic
coupling
effect
designed,
can
operate
free
from
battery
acquire
multiple
information.
It
envisioned
that
strategies
would
hold
enormous
potential
flexible
electronics,
versatile
platforms,
on-body
networks.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
unknown
Published: Dec. 31, 2023
Abstract
Ionogels,
composed
of
ionic
liquids
and
supporting
networks,
possess
a
plethora
exceptional
properties,
including
nonvolatility,
remarkable
thermal
electrochemical
stability,
elevated
mechanical
strength,
as
well
outstanding
conductivity.
Based
on
these
extraordinary
characteristics,
ionogels
have
found
extensive
applications
in
diverse
fields
encompassing
functional
materials,
sensors,
soft
electronics,
solid
electrolytes,
biomedicine.
In
recent
years,
witnessed
significant
advancements
emerged
highly
popular
subject
matter.
Consequently,
this
review
provides
comprehensive
overview
the
latest
progress
made
realm
ionogels.
The
preparation
methods
are
initially
introduced
following
concise
introduction.
Subsequently,
properties
ionogels,
high
low
temperature
resistance,
conductivity,
stimuli‐response
self‐healing
recyclability
their
structure‐property
relationships,
comprehensively
discussed.
Moreover,
utilization
skins,
adhesions
other
domains
also
elaborated
upon
extensively.
Finally,
after
succinct
summary,
challenges
prospects
regarding
future
development
thoroughly
deliberated.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(21)
Published: Nov. 22, 2023
Abstract
Hydrogels
have
emerged
as
powerful
building
blocks
to
develop
various
soft
bioelectronics
because
of
their
tissue‐like
mechanical
properties,
superior
bio‐compatibility,
the
ability
conduct
both
electrons
and
ions,
multiple
stimuli‐responsiveness.
However,
hydrogels
are
vulnerable
damage,
which
limits
usage
in
developing
durable
hydrogel‐based
bioelectronics.
Self‐healing
aim
endow
with
property
repairing
specific
functions
after
failure,
thus
improving
durability,
reliability,
longevity.
This
review
discusses
recent
advances
self‐healing
hydrogels,
from
mechanisms,
material
chemistry,
strategies
for
properties
improvement
hydrogel
materials,
design,
fabrication,
applications
bioelectronics,
including
wearable
physical
biochemical
sensors,
supercapacitors,
flexible
display
devices,
triboelectric
nanogenerators
(TENGs),
implantable
etc.
Furthermore,
persisting
challenges
hampering
development
prospects
proposed.
is
expected
expedite
research
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(22)
Published: March 15, 2023
Hydrogels
have
entered
the
spotlight
for
applications
in
soft
electronics.
It
is
essential
and
challenging
to
obtain
hydrogels
that
can
function
properly
under
varying
environmental
circumstances,
is,
30-90%
relative
humidity
(RH)
-20
40
°C
due
their
intrinsic
nature
lose
absorb
water
upon
variations
temperature.
In
this
work,
a
green
solvent,
solketal,
introduced
into
poly
3-dimethyl-2-(2-methylprop-2-enoyloxy)ethyl
azaniumyl
propane-1-sulfonate
(poly(DMAPS))
zwitterionic
hydrogels.
Compared
glycerol,
solketal
endows
with
greater
possibility
further
modification
as
well
improved
content
mechanical
performance
consistency
over
RH.
Encouragingly,
optimized
hydrogel
demonstrates
its
unique
merits
dielectric
layer
iontronic
sensors,
featuring
non-leaky
ions,
high
sensitivity
(1100
kPa-1
),
wide
humidity,
temperature
range
applicability.
A
wide-humidity
healable
stretchable
electrode
attained
by
combining
substrate
Ag
paste.
full-device
highly-sensitive
sensor
developed.
This
study
pioneering
work
tackles
broad
applicability
issue
of
hydrogels,
ion-leakage-free
ionic
skins
dielectrics.
The
outcomes
will
considerably
promote
advancements
fields
electronics
sensors.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(16)
Published: Jan. 23, 2024
Abstract
With
the
commercialization
of
first‐generation
flexible
mobiles
and
displays
in
late
2010s,
humanity
has
stepped
into
age
electronics.
Inevitably,
soft
multifunctional
sensors,
as
essential
components
next‐generation
electronics,
have
attracted
tremendous
research
interest
like
never
before.
This
review
is
dedicated
to
offering
an
overview
latest
emerging
trends
sensors
their
accordant
future
development
(R&D)
directions
for
coming
decade.
First,
key
characteristics
predominant
target
stimuli
are
highlighted.
Second,
important
selection
criteria
introduced.
Next,
materials/structures
identified.
Specifically,
R&D
these
envisaged
based
on
trends,
namely
i)
decoupling
multiple
stimuli,
ii)
data
processing,
iii)
skin
conformability,
iv)
energy
sources.
Finally,
challenges
potential
opportunities
discussed,
new
insights
prospects
fast‐emerging
technology.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(23)
Published: March 6, 2023
Abstract
Stress
concentration
and
hysteresis
often
occur
in
polymer
hydrogels
under
large
deformation,
affecting
their
mechanical
properties,
durability.
Here,
a
new
spatial
confinement
gelation
strategy
is
proposed
for
fabrication
of
hysteresis‐free
hydrogels,
stress
avoided.
Experimental
results
theoretical
calculations
confirm
that
the
hydratability
difference
between
salts
chains
leads
to
by
control
over
ratio
bound
free
water.
Spatial
acts
place
physical
cross‐linking
chains,
which
slide
dissipate
energy
effectively
avoid
hysteresis,
resulting
ultra‐tough
with
fatigue
resistance.
This
also
universal
preparing
different
monomers
salts.
Taking
prepared
PAM‐CaCl
2
hydrogel,
it
displays
only
0.13%
during
load‐unload
cycles,
even
1000%
strain.
lowest
value
among
reported
date.
Along
excellent
resistance,
water
retention,
antifreeze,
water‐assisted
healing
ability,
this
hydrogel
shows
good
performance
resistant
capacitive
strain
sensors.
Moreover,
fishtail‐shaped
operates
as
bionic
muscle
drive
fish
at
forward
speed
16.3
cm
s
−1
,
when
voltage
0.1
V
applied.
