Advanced Materials Technologies,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 28, 2025
Abstract
Counterfeiting
poses
an
ever‐growing
challenge,
driving
the
need
for
innovative
anti‐counterfeiting
strategies
and
technologies.
Many
solutions
focus
on
tags
characterized
by
optical
features
that
are
camouflaged
to
human
eye,
thus
discouraging
scammers.
In
this
paper,
a
QR
code
is
printed
using
commercial
printer
thin
plastic
foil
previously
coated
specific
nanocavity
consisting
of
metal‐insulator‐metal‐insulator
(MIMI)
multilayer,
possesses
unique
in
terms
light
transmission
reflection,
due
its
design.
A
layer
polymer
dispersed
liquid
crystals
(PDLC),
fabricated
camouflage
becomes,
then,
readable
only
under
thermal
conditions.
Two
were
fabricated,
each
distinct
nematic
crystal
(NLC)
with
own
nematic‐isotropic
transition
temperature.
The
combination
properties
NLCs
nanocavities
results
creation
new
type
showing
two
different
encoding
levels.
Stability
tests
such
as
immersion
water,
bending
test,
prolonged
heating
have
been
performed
ensuring
long‐term
stability
tags.
realized
security‐level
cost‐effective,
straightforward
manufacture
and,
thanks
their
flexibility,
can
be
easily
integrated
into
packaging
products.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(28)
Published: May 14, 2024
Abstract
Constructing
an
anti‐counterfeiting
material
with
non‐interference
dual
optical
modes
is
effective
way
to
improve
information
security.
However,
it
remains
challenging
achieve
multistage
secure
encryption
due
the
limited
stimulus
responsiveness
and
color
tunability
of
current
dual‐mode
materials.
Herein,
a
hydrogel
both
independently
tunable
structural
fluorescent
colors
toward
encryption,
reported.
In
this
system,
rigid
lamellar
structure
poly(dodecylglyceryl
itaconate)
(pDGI)
formed
by
shear
flow‐induced
self‐assembly
provides
restricted
domains
wherein
monomers
undergo
polymerization
form
network,
producing
color.
The
introduction
monomer
6‐acrylamidopicolinate
(6APA)
as
complexation
site
possibility
formation.
hydrogel's
angle‐dependent
can
be
controlled
adjusting
crosslinking
density
water
content.
Additionally,
fluorescence
modulated
ratio
lanthanide
ions.
Information
displayed
separately
in
different
channels
synergistically
overlayed
read
ultimate
message.
Thus,
system
based
on
devised
through
programed
decryption
process.
This
strategy
holds
tremendous
potential
platform
for
encrypting
safeguarding
valuable
authentic
field
anti‐counterfeiting.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(38)
Published: April 9, 2024
Abstract
Multifunctional
shape
memory
polymers
are
significant
for
next‐generation
intelligent
systems
as
smart
materials.
However,
their
practical
applications
limited
by
toughness,
manufacturability,
and
functional
integration
strategies.
Besides,
while
4D
printing
is
used
to
construct
deformable
devices,
the
accessible
shapes
difficulty
of
integrating
multiple
materials
hindered
development
multifunctional
devices.
Herein,
metal‐phenolic
coordination
crosslinks
tailor
tough
polyurethanes
with
intrinsic
photothermal
effect
and/or
tunable
fluorescence.
The
reversible
dissociation
complexes
upon
loading
provides
an
efficient
energy
dissipation
polymer
network.
photothermal/fluorescent
properties
target
polyurethane
can
be
effortlessly
programmed
changing
coordinated
metals
ligands.
obtained
fluorescent
displays
fluorescence
through
dissociation‐association
dynamic
bonds
thermal
stimulus.
Moreover,
relying
on
light‐triggered
hybrid
exchange
reactions
among
various
bonds,
heterogeneous
interfaces
merged
manufacture
exquisite
3D
shape‐shifting
devices
integrate
more
advanced
functions.
As
demonstrations,
photothermal‐responsive
stent,
encryption
device
produced
based
photo‐welding
instead
printing.
This
study
not
only
a
convenient
supramolecular
strategy
constructing
but
also
demonstrates
feasible
method
making
personalized
integrated
architectures.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(25)
Published: March 27, 2024
Cephalopods
evolve
the
acetylcholine-gated
actuation
control
function
of
their
skin
muscles,
which
enables
dynamic/static
multimode
display
capacities
for
achieving
perfectly
spatial
over
colors/patterns
on
every
inch
skin.
Reproduction
artificial
analogs
that
exhibit
similar
multimodal
is
essential
to
reach
advanced
information
three-dimensional
(3D)
encoding
with
higher
security
than
classic
2D-encoding
strategy,
but
remains
underdeveloped.
The
core
difficulty
how
replicate
such
chemical-gated
into
soft
actuating
systems.
Herein,
this
work
proposes
develop
azobenzene-functionalized
poly(acrylamide)
(PAAm)
hydrogel
systems,
whose
upper
critical
solution
temperature
(UCST)
type
responsiveness
can
be
intelligently
programmed
or
even
gated
by
addition
hydrophilic
α-cyclodextrin
(α-CD)
molecules
reversible
association
pendant
azobenzene
moieties
via
supramolecular
host-guest
interactions.
By
employing
α-CD-gated
actuator
as
an
analogue
cephalopods'
muscle,
biomimetic
mechanically
modulated
multicolor
fluorescent
systems
are
designed,
demonstrate
a
conceptually
new
"thermal
stimulation-hydrogel
actuation-fluorescence
output"
mechanism.
Consequently,
high-security
3D-encoding
carriers
unprecedented
combination
single-input
multiple-output,
dual-mode
and
spatially
controlled
achieved.
This
bioinspired
strategy
brings
functional-integrated
features
opens
previously
unidentified
avenues
security.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 23, 2024
Abstract
Time‐resolved
photofluorochromism
constitutes
a
powerful
approach
to
enhance
information
encryption
security
but
remains
challenging.
Herein,
we
report
strategy
of
using
hydrogen
bonds
regulate
the
time
for
initiating
photofluorochromism.
In
our
strategy,
copolymers
containing
negative
photochromic
spiropyran
(NSP),
naphthalimide,
and
multiple
hydrogen‐bonding
(UPy)
units
are
designed,
which
display
photo‐switchable
fluorescence
resonance
energy
transfer
(FRET)
process
from
naphthalimide
donor
NSP
acceptor.
Interestingly,
FRET
is
locked
via
dynamic
interaction
between
ring‐opened
UPy
moieties,
resulting
in
time‐dependent
fluorescence.
The
change
can
be
finely
regulated
fraction
polymers.
Besides
novel
fluorescence,
polymers
also
take
advantage
visible‐light
triggerable,
excellent
photostability,
photoreversibility,
processability.
We
demonstrate
that
these
properties
enable
them
many
application
opportunities
such
as
fluorescent
labels
multilevel
patterns.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(34)
Published: April 11, 2024
Abstract
Luminescent
materials
are
emerging
promising
tools
for
digital
data
encoding
due
to
their
reduced
cost,
facile
reading,
robustness,
and
durability.
For
this,
the
use
of
fluorescent
systems
that
combine
multicolor
emission
with
sensitivity
external
stimuli
will
be
highly
desirable,
as
they
can
offer
rewritable
together
enhanced
encryption
security
storage
density.
Herein
a
novel
strategy
is
pioneered
reach
this
goal,
which
exploits
temperature‐responsive
properties
mixtures
regular
fluorophores
simple
organic
phase
change
(PCMs)
such
paraffins.
By
preparing
diversity
microcapsules
these
comprising
different
dyes
PCMs,
thermosensitive
pixels
prepared
in
low‐cost,
straightforward,
scalable
manner
exhibits
dynamic
behavior.
These
features
capitalized
fabricate
pixel
arrays
perform
two
advanced
operations:
high‐security
3D
information
encryption,
4D
storage.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 13, 2025
Multimode
luminescent
materials
exhibit
tunable
photon
emissions
under
different
excitation
or
stimuli
channels,
endowing
them
high
encoding
capacity
and
confidentiality
for
anti-counterfeiting
encryption.
Achieving
multimode
luminescence
into
a
stable
single
material
presents
promising
but
remains
challenge.
Here,
the
downshifting/upconversion
emissions,
color-tuning
persistent
(PersL),
temperature-dependent
multi-color
hydrochromism
are
integrated
Er3+
ions
doped
Cs2NaYbCl6
nanocrystals
(NCs)
by
leveraging
shallow
defect
levels
directed
energy
migration.
The
resulting
NCs
display
strong
static
dynamic
colorful
in
response
to
ultraviolet,
980-nm
laser,
X-ray.
Additionally,
distinct
colors
as
temperature
increases
from
330
430
K.
Surprisingly,
it
also
demonstrates
ability
of
reversible
emission
modal
color
water.
Theoretical
calculations
experimental
characterizations
reveal
that
self-trapped
exciton
state
(STEs),
chlorine
vacancy
defects,
ladderlike
4f
contribute
multimodal
luminescence.
More
importantly,
has
extremely
remarkable
environmental
stability,
which
can
be
stored
air
more
than
18
months,
showing
commercial
prospects.
This
work
not
only
gives
new
insights
lanthanide-based
metal
halide
provides
route
developing
nanomaterials
