Journal of Macromolecular Science Part A,
Год журнала:
2024,
Номер
61(9), С. 581 - 591
Опубликована: Июнь 24, 2024
Addressing
the
loss
of
substrate
conductivity
after
enduring
numerous
bending
stands
as
a
significant
challenge
for
flexible
electronics.
The
primary
cause
reduced
electrical
in
polymer
matrices
is
disorganization
conducting
channels
by
mechanical
stress
generated
during
repeated
stretching
cycles.
In
this
feature
article,
we
extensively
reviewed
strategies
adopted
to
control
structure
formation
networks
optimizing
filler
and
matrix
interactions
at
length
scale.
Studies,
including
our
recent
experiments,
indicate
that
fractal
assemblies
determines
stability
channels.
A
wide
range
polymers
fillers
with
different
geometries
functional
attributes
have
been
analyzed
highlight
intra
intermolecular
reinforcing
effects
address
shear
stresses
originating
substrates.
Understanding
non-bonded
between
may
lead
development
desired
formulation
inks
print
on
surfaces
next-generation
wearable
International Journal of Fatigue,
Год журнала:
2024,
Номер
188, С. 108487 - 108487
Опубликована: Июль 14, 2024
The
impact
of
mechanical
fatigue
on
load-bearing
metallic
components
and
structures
is
highly
significant,
encompassing
economy,
environment
safety
aspects.
For
nearly
200
years,
engineers
scientists
have
been
relentlessly
trying
to
avoid
failures
understand
their
causes.
last
few
decades
seen
the
prominent
advent
a
wide
range
experimental
computational
techniques
that
allowed
us
make
once-unthinkable
advances
in
this
field.
Despite
progress,
significant
number
problems
remain
unsolved.
This
short
note
pinpoints
most
critical
aspect
failure:
conditions
initiate
or
allow
propagating
cracks
form.
Specifically,
fundamentals
are
examined,
while
acknowledging
crucial
role
multiphysics
aspects
often
present
real-life
engineering
applications.
first
part
frames
problem
by
introducing
essential
concepts
exploring
mechanistic
across
different
length
scales
loading
regimes.
Subsequently,
brief
but
wide-ranging
review
highlights
current
research
trends.
foundation
sets
stage
for
identifying
outstanding
challenges
potential
future
directions
conclusive
article.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
17(9), С. 14243 - 14249
Опубликована: Фев. 19, 2025
Flexible
colloidal
quantum
dot
(QD)
optoelectronics
apply
the
superior
properties
of
QDs
to
flexible
devices,
exhibiting
unique
advantages
in
fields
imagers,
solar
cells,
displays,
wearable
sensors,
on-skin
electronics,
robotics,
and
bioimaging.
Here,
we
show
that
QD
photodiodes
(QDPDs)
with
an
ultrathin
absorber
layer
have
record
bending
stability
100,000
repetitive
cycles
devices.
The
QDPDs
obtained
a
high-quality
p-n
junction
1700
rectification
ratio.
formation
Fabry-Pérot
cavity
by
layered
stack
results
3.4-fold
enhanced
light
absorption,
while
structure
ensures
near-unity
efficient
extraction
(97%)
photogenerated
charge
carriers
from
PbS
film
upon
illumination
1330
nm
short-wavelength
infrared
light.
Finally,
suppression
capacitance
effect,
response
time
this
QDPD
can
be
as
short
20
ns,
which
is
fastest
for
QDPDs.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(9), С. 11595 - 11604
Опубликована: Фев. 21, 2024
Dielectric
elastomer
generator
(DEG),
which
consists
of
a
dielectric
(DE)
film
sandwiched
between
two
flexible
electrodes
(FEs),
has
the
advantages
lightweight,
high
energy
density,
and
conversion
efficiency,
providing
simple
feasible
solution
for
harvesting
from
human
motion
or
nature.
As
crucial
constituents
DEG,
FEs
are
expected
to
possess
excellent
conductivity
compliance.
Nevertheless,
there
is
currently
no
quantitative
characterization
method
FE
In
addition,
impact
mechanism
compliance
on
performance
fatigue
life
DEG
remains
unclear.
this
study,
dynamic
mechanical
property
(DMP)
was
used
assess
FEs,
proposed.
A
series
silicone
rubber
(SREs)
with
different
DMPs
were
designed
prepared,
stability
investigated.
The
results
indicate
that
key
achieving
lies
in
reducing
difference
magnitude
complex
modulus
phase
angle
DE,
can
significantly
reduce
interfacial
friction
extend
DEG.
Benefiting
enhanced
compliance,
full-life
density
device
increase
by
20.3
times
26.4
times,
respectively,
compared
those
commonly
carbon-based
electrodes.
ACS Sensors,
Год журнала:
2024,
Номер
9(7), С. 3671 - 3679
Опубликована: Июнь 28, 2024
Flexible
sensors
have
developed
rapidly
due
to
their
great
application
potential
in
the
intelligent
era.
However,
frequent
bending
work
requirements
pose
a
serious
challenge
mechanical
reliability
of
flexible
sensors.
Herein,
strategy
using
new
multielectrode
layout
achieve
multiple
sensing
signals
based
on
one
external
signal
is
proposed
for
first
time
improve
piezoresistive
The
consists
pair
interdigital
electrodes
and
bottom
electrode.
interdigitated
are
used
sense
change
surface
resistance
sensor,
electrode
bulk
sensor.
As
result,
without
increasing
unit
area,
allows
sensor
generate
three
response
electrical
when
an
pressure,
thus
improving
Based
layout,
highly
reliable
with
multilevel
porous
structure
obtained
by
microwave
foaming
method
template.
In
working
state
resistance,
has
22.12
kPa–1
sensitivity.
Meanwhile,
shows
55.17
Furthermore,
applied
monitor
human
pulse
speech
signals,
demonstrating
its
multisignal
output
characteristics
applications
electronics.
conclusion,
expected
greatly
promote
practical
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 12, 2025
Abstract
Patients
with
hand
dysfunction
require
joint
rehabilitation
for
functional
restoration,
and
wearable
electronics
can
provide
physical
signals
to
assess
guide
the
process.
However,
most
are
susceptible
failure
under
large
deformations
owing
instability
in
layered
structure,
thereby
weakening
signal
reliability.
Herein,
an
in‐situ
self‐welding
strategy
that
uses
dynamic
hydrogen
bonds
at
interfaces
integrate
conductive
elastomer
layers
into
highly
robust
is
proposed.
This
enables
interlocking
of
different
microstructures,
achieving
high
interfacial
toughness
(e.g.,
≈700
J
m
−2
micropyramid
layer
smallest
welding
areas)
preventing
structural
failure.
The
welded
exhibit
excellent
pressure‐sensing
performance,
including
sensitivity,
a
wide
sensing
range,
long‐term
stability,
surpassing
those
unwelded
electronics.
reliable
collection
comprehensive
pressure
during
rehabilitation,
which
beneficial
assessing
levels
patient.
Furthermore,
machine
learning‐assisted
system
using
t
‐distributed
stochastic
neighbor
embedding
artificial
neural
network
models
facilitate
home‐based
active
established,
reduces
need
frequent
hospital
visits.
analyzes
quantifies
timely
manner,
allowing
patients
adjust
training
programs
autonomously,
accelerating
