Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 12, 2024
Abstract
Stimuli‐responsive
surfaces
have
garnered
intensive
research
attention
in
addressing
the
challenges
of
severe
information
leakage
problems,
but
they
exhibit
limitations
terms
intricate
preparation
and
compatibility.
Herein,
study
reports
a
time‐dependent
wrinkled
surface
controlled
by
photo‐induced
stress
relaxation
azobenzene‐
containing
crosslinked
polymer
network
comprised
furan‐containing
(PEA‐Fu)
maleimide‐substituted
azobenzene
(AZO‐2MI)
as
skin
layer.
Two
kinds
induced
two
networks
(thermal‐
UV‐induced)
can
be
prepared
Diels‐Alder
reaction
UV‐induced
radical
coupling
reaction,
exhibiting
distinct
amplitude
decrease
rate
resulted
from
different
photo‐isomerization
azobenzene.
By
UV
preprogramming
with
photomasks,
various
wrinkle
patterns
are
obtained
identified
at
specific
times
under
450
nm
irradiation.
The
time
window
for
read
out
preset
through
boundary
conditions
to
achieve
multi‐level
encryption.
Furthermore,
written
camouflaged
another
“false”
regional‐selective
irradiation
irradiation,
which
offers
new
method
protection.
Based
on
distinctive
characteristics
excellent
stability,
this
responsive
bright
prospects
Science Advances,
Journal Year:
2024,
Volume and Issue:
10(48)
Published: Nov. 29, 2024
Hybrid
organic-inorganic
molecular
ferroelectrics
have
emerged
as
promising
materials
for
multifunctional
piezoelectric
devices.
However,
they
present
challenges
in
practical
applications
because
of
their
inherent
brittleness
and
poor
ductility.
Herein,
we
a
flexible
mechano-optical
dual-responsive
ferroelectric
composite
by
incorporating
trimethylchloromethyl
ammonium
(TMCM)–MnCl
3
into
styrene
ethylene
butylene
(SEBS)
matrix.
The
SEBS/TMCM-MnCl
exhibits
excellent
stretchable
mechanical
properties
(tensile
strain
>1300%,
thickness
30
μm),
piezoelectricity,
photoluminescence,
enabling
advanced
visual-tactile–fused
anticounterfeiting
encryption
applications.
Anticounterfeiting
antitampering
tags
are
developed
to
judge
whether
the
valued
items
true
or
tampered
with
based
on
pattern
recognition
response,
respectively.
Additionally,
high-security
password
keyboards
featuring
triple-layer
designed,
offering
more
combinations
(524,288
times
greater
than
those
traditional
devices
relying
solely
digital
encryption)
enhanced
security
reliability
against
cracking
attempts.
This
work
can
inspire
designs
optoelectronic
enable
intelligent
human-machine
interfaces,
information
security,
robotics.
Angewandte Chemie,
Journal Year:
2023,
Volume and Issue:
135(48)
Published: Oct. 11, 2023
Abstract
Information
security
has
gained
increasing
attention
in
the
past
decade,
leading
to
development
of
advanced
materials
for
anti‐counterfeiting,
encryption
and
instantaneous
information
display.
However,
it
remains
challenging
achieve
high
with
simple
procedures
low‐energy
stimuli.
Herein,
a
series
strain/temperature‐responsive
liquid
crystal
elastomers
(LCEs)
are
developed
dual‐modal,
multi‐level
real‐time,
rewritable
transient
The
as‐prepared
polydomain
LCEs
can
change
from
an
opaque
state
transparent
under
strain
or
temperature
stimuli,
transition
strains
temperatures
highly
dependent
on
concentration
long‐chain
flexible
spacers.
encrypted
by
different
LCE
inks
be
decrypted
specific
temperatures,
protection
security.
Furthermore,
combination
phase
photothermal
effect
multi‐walled
carbon
nanotubes
(MWCNTs),
we
achieved
repeatable
display
using
near‐infrared
(NIR)
light
as
pen
writing.
This
study
provides
new
insight
into
versatility
broad
applications.
