ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(48), P. 33097 - 33104
Published: Nov. 18, 2024
Hydrochromic
materials
undergo
magical
color
changes
when
interacting
with
water
and
are
receiving
widespread
attention
for
their
frontier
applications
such
as
sensing
information
security.
The
hydrochromic
effect
is
observable
in
perovskite
via
the
mechanism
of
water-induced
fluorescence
quenching.
However,
due
to
isolation,
achieving
a
perovskite-polymer
composite
remains
elusive,
notwithstanding
its
importance
potentially
commercial-ready
material.
Here,
we
demonstrate
perovskite-polymer-based
porous
nonsolvent-induced
phase
separation
method,
comprising
FA2PbBr4/poly(vinylidene
fluoride)
(FA
=
formamidinium).
naturally
formed
pores
serve
microchannels,
facilitating
moisture
diffusion.
penetrated
induces
transition
material
from
nonfluorescent
two-dimensional
FA2PbBr4
fluorescent
three-dimensional
FAPbBr3.
This
work
has
developed
composites,
enabling
various
chromatic
conceptually
demonstrated
custom-made
fingerprint
labels,
quick
response
code
anticounterfeiting
encrypted
document
protections,
water-ink
inkjet
printing.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
Abstract
Luminescent
responsive
heterostructures
with
region‐domained
emission
and
integrated
responsiveness
exhibit
great
potential
in
information
security,
but
always
suffer
from
the
direct
exposure
of
fingerprint
at
initial
state,
making
it
easy
to
decode
hidden
confidential
information.
Herein,
first
monochromatic
hydrogen‐bonded
organic
framework
(HOF)
are
reported
based
on
VIA‐group‐based
hybridization
toward
fully‐covert
photonic
barcodes.
Designed
HOF
blocks
different
VIA‐group
elements
via
a
configuration‐assimilation‐based
assembly
method
generate
intrinsic
heterostructures.
Differentiated
electronegativity
endows
each
block
distinct
bonding
stability,
which
triggers
actions
same
stimuli,
finally
forming
multicolor
mode
state.
These
can
effectively
hide
information,
further
demonstrates
coding
capability
as
high‐security
anti‐counterfeiting
labels.
findings
offer
novel
insight
exploitation
smart‐responsive
hetero‐HOF
systems
for
advanced
encryption
anticounterfeiting
applications.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 13, 2025
Abstract
Perovskite
quantum
dots
(PQDs)
are
promising
materials
for
photonic
and
optoelectronic
devices,
relying
on
efficient
reliable
patterning
methods.
However,
the
complex
process
poor
stability
of
PQDs
restrict
their
practical
applications.
Here,
a
patterning‐induced
encapsulation
strategy
(PIE‐PQDs)
is
demonstrated
directly
into
thin
polystyrene
(PS)
film.
The
prepared
PQDs@PS
composite
film
displays
excellent
air
(30d,
92%),
UV
resistance
85%),
water
(30d,88%).
Notably,
even
in
harsh
environments
such
as
acid/alkali/alcohol
aqueous
solution,
still
preserves
high
luminescence.
A
binary
solvent
engineering
induced
to
precisely
control
distribution
inside
polymer
film,
resulting
morphologically
controllable
microstructures
optical
information
encryption.
Patterned
can
be
compatible
with
diverse
substrates
including
silicon,
glass,
paper,
plastic
feature
This
method
shows
universal
situ
protection
approach
integrating
flexible
substrates,
offering
significant
potential
display,
data
storage,
encryption,
anti‐counterfeiting.
Chemical Society Reviews,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
This
review
focuses
on
stimuli-responsive
material
(SRM)-based
data
protection,
emphasizing
the
integration
of
intricate
logic
and
algorithms
in
SRM-constructed
hardware.
It
also
discusses
current
challenges
future
directions
field.
Applied Physics Letters,
Journal Year:
2025,
Volume and Issue:
126(13)
Published: March 1, 2025
Inorganic
crystals
doped
with
luminescent
ions
have
attracted
considerable
interest
due
to
their
abundant
luminescence
spectra.
Particularly,
these
materials
can
show
highly
variable
in
response
external
stimuli,
rendering
widespread
applications
ranging
from
super-resolution
techniques
high-security
information
encryption.
In
this
Perspective,
we
highlight
the
recent
developments
of
controlling
optical
inorganic
under
various
including
light,
temperature,
water/humidity,
and
mechanical
force.
Moreover,
delve
into
underlying
mechanism
discuss
relevant
applications,
simultaneously
pointing
out
challenges
future
directions
for
designing
superior
stimuli-responsive
materials.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 7, 2024
Abstract
Mechanoluminescence
(ML),
which
generates
an
optical
response
to
external
mechanical
stimuli,
shows
promise
for
high‐end
stress
sensing,
flexible
optoelectronic
skin,
dynamic
visualization,
and
anti‐counterfeiting
applications.
Near‐infrared
(NIR)
light
possesses
the
advantages
of
high
tissue
penetration
capability
can
be
absorbed
by
certain
organic
molecules,
thus
NIR‐ML
materials
have
potential
applications
in
biomechanics
imaging,
nondestructive
composition
analysis,
etc.
However,
their
practical
are
limited
emission
wavelengths
bandwidths
materials.
In
this
study,
a
series
double
perovskites
A
2
MSbO
6
:Cr
3+
(A
=
Sr,
Ba;
M
Ga,
Sc)
is
reported
with
self‐recoverable
emissions.
By
modulating
composition,
ML
coverage
tuned
from
NIR‐I
NIR‐II
(700
nm
over
1200
nm),
adjusted
full
width
at
half
maximum
163
nm.
addition,
under
ultrasonic
stimulation,
these
emitted
NIR
light,
Sr
ScSbO
penetrating
5
mm
beef
tissue.
This
study
expands
library
sources
spectral
range,
thereby
promoting
new
Applied Physics Letters,
Journal Year:
2024,
Volume and Issue:
125(3)
Published: July 15, 2024
The
correlated
color
temperature
(CCT)
of
lighting
is
closely
related
to
human
emotions.
However,
there
still
a
relative
lack
white
light
emitting
devices
(W-LEDs)
with
tunable
CCT
meet
application
demands
in
different
scenarios.
Here,
we
develop
W-LED
based
on
multiple
emissive
centers
carbon
dots
(CDots)
synthesized
through
controlled
thermal
carbonization
citric
acid
and
urea.
reaction
at
160
°C
for
4
h
results
amorphous
CDots,
which
exhibit
excitation
wavelength
dependent
photoluminescence
(PL)
containing
two
peaks
446
520
nm.
by
increasing
the
duration,
crystalline
CDots
are
obtained,
show
broad
PL
peaking
650
Based
their
complementary
spectral
ranges,
an
extremely
high
rendering
index
96
demonstrated.
Moreover,
both
365
405
nm
electroluminescent
chips
designed.
shifts
from
cold
warm
white,
when
switch
This
adjustable
can
create
harmonious,
enjoyable,
safe
environment
scenes.
