Liquid Crystals,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 10
Published: Nov. 11, 2024
Cholesteric
liquid
crystal
(CLC)
is
particularly
remarkable
due
to
its
ability
exhibit
structural
colour.
Structural
colour
materials
offer
solutions
for
information
encryption
that
feature
good
stability,
ease
of
perceivability,
and
arbitrary
patterns.
This
work
investigates
the
temperature-dependent
variation
CLC
provides
a
quantitative
analysis
pitch
helix
twist
power
(HTP)
at
different
temperatures,
further
exploring
potential
applications
in
encryption.
By
recording
quick
response
(QR)
code
patterns
LC
Polymer
cell,
single-pattern
dual-pattern
cells
are
prepared,
their
demonstrated.
The
QR
pattern
will
be
hidden
or
revealed
as
temperature
changes
by
cell.
Additionally,
requires
polarisers
address
crosstalk
issue
under
white
light,
making
cell
safer
solution
access
control
systems.
These
results
lay
theoretical
foundation
stimulus-responsive
colours
valuable
insights
security
anti-counterfeiting
applications.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(20)
Published: April 4, 2024
Abstract
Robust
anti‐counterfeiting
techniques
aim
for
easy
identification
while
remaining
difficult
to
forge,
especially
high‐value
items
such
as
currency
and
passports.
However,
many
existing
rely
on
deterministic
processes,
resulting
in
loopholes
duplication
counterfeiting.
Therefore,
achieving
high‐level
encryption
authentication
through
conventional
has
remained
a
significant
challenge.
To
address
this,
this
work
proposes
solution
that
combined
fluorescence
structural
colors,
creating
physically
unclonable
multiplex
system
(PUMES).
In
study,
the
physicochemical
properties
of
colloidal
photonic
inks
are
systematically
adjusted
construct
comprehensive
printing
phase
diagram,
revealing
printable
region.
Furthermore,
brightness
color
saturation
inkjet‐printed
crystal
colors
optimized
by
controlling
substrate's
hydrophobicity,
printed
droplet
volume,
addition
noble
metals.
Finally,
is
incorporated
build
PUMES,
including
macroscopic
patterns,
well
microscopic
patterns.
The
PUMES
with
intrinsic
randomness
high
encoding
capacity
authenticated
deep
learning
algorithm,
which
proved
be
reliable
efficient
under
various
observation
conditions.
This
approach
can
provide
formidable
resistance
against
counterfeiting,
making
it
highly
promising
next‐generation
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 18, 2024
The
ability
to
reversibly
exhibit
structural
color
patterns
has
positioned
photonic
crystals
(PCs)
at
the
forefront
of
anti-counterfeiting.
However,
security
offered
by
mere
reversible
display
is
susceptible
illicit
alteration
and
disclosure.
Herein,
inspired
electronic
message
captcha,
bilayer
crystal
(BPC)
systems
with
integrated
decryption
verification
modules,
are
realized
combining
inverse
opal
(IO)
double
(DIO)
polyacrylate
polymers.
When
informationized
BPC
immersed
in
ethanol
or
water,
DIO
layer
displayed
encrypted
information
due
solvent-induced
ordered
rearrangement
polystyrene
(PS)
microspheres.
step
established
based
on
different
colors
IO
pattern,
which
result
from
deformation
recovery
macroporous
skeleton
induced
solvent
evaporation.
Moreover,
through
evaporation-induced
random
self-assembly
PS@SiO
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 25, 2024
Counterfeit
and
substandard
high-end
leather
products
have
inflicted
substantial
economic
damage
worldwide
tarnished
the
reputation
of
industry
as
a
whole.
Due
to
limited
security
level,
current
anti-counterfeiting
measures
are
often
vulnerable
attacks.
Physically
unclonable
function
(PUF)
is
regarded
pinnacle
protection
against
counterfeiting.
Leather,
with
distinctive
micro-nano
porous
structure
random
creasing
patterns,
serves
an
ideal
substrate
for
optical
PUF.
Here,
flexible
durable
leather-based
PUF
device
introduced
that
incorporates
fluorescent
perovskite
quantum
dots.
The
fluorescence
intensity
distributed
along
texture
offers
parametric
support
challenge-response
pairs.
Combined
self-defined
pattern,
hierarchical
authentication
realized.
In
conclusion,
this
innovation
desired
opportunity
achieving
high-security
information
traceability.
Multicolor
fluorescent
encryption
systems
that
respond
to
specific
stimuli
have
drawn
widespread
attention
data
storage
and
due
their
low
cost
facile
access.
However,
existing
are
limited
by
materials,
restricting
depth.
This
study
uses
DNA
molecules
as
materials
offer
exceptional
specificity
depth
within
sequences.
With
inkjet-printed
microarrays
on
a
solid-phase
interface,
multicolor
system
based
hybridization
strand
displacement
is
developed,
achieving
an
with
high
flexibility.
strands,
modified
different
labels,
delivered
onto
interfaces
containing
self-assembled
monolayer
(SAM)
via
inkjet
printing,
forming
microarrays.
Data
achieved
through
the
of
strands
for
presentation
interference
SAM
at
interface
between
solid
phase
droplets.
Interference
can
be
removed
decryption.
The
this
determined
design
sequences
combination
multiple
showcasing
its
outstanding
ability.
Meanwhile,
high-throughput
printing
accelerates
writing
process,
further
enhancing
efficiency.
reaction
in
microarrays,
provides
scalable
robust
strategy
high-depth
efficient
encryption.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 5, 2025
Abstract
One‐dimensional
photonic
crystals
(1D
PCs)
emerged
as
superb
sensing
platforms
due
to
their
high
sensitivity
environmental
changes.
However,
effectively
translating
the
microscopic
interactions
between
covalent
organic
frameworks
(COFs)
and
analytes
into
macroscopic
optical
responses
via
1D
PCs
for
intuitive
detection
presents
a
significant
challenge.
Here,
we
propose
stepwise‐induced
synthesis
strategy
that
first
time
achieves
size‐controlled
of
uniform
nanoscale
COFs
(60–80
nm),
leading
high‐quality
COF
layer.
This
advancement
enables
COF‐based
exhibit
diverse
color
variations
controllable
saturation.
Notably,
excellent
compatibility
layer
with
inorganic
oxides,
polymers,
metal‐organic
(MOFs)
results
in
these
exhibiting
bright
colors.
Crucially,
introducing
mesoporous
materials
achieve
deep
integration
adsorption
recognition
functions
volatile
compounds
(VOCs).
The
fabricated
COF/MOF
PC
allows
differentiation
12
VOCs
visually
detects
at
different
concentrations
(0–80
g
m
−
3
)
through
changes,
response
under
1
s.
In
particular,
can
be
transferred
flexible
substrates
while
retaining
VOC
visual
sensing.
These
attributes
highlight
potential
real‐time
monitoring
industrial
environments.
Science Advances,
Journal Year:
2025,
Volume and Issue:
11(8)
Published: Feb. 19, 2025
Electrochromic
effect
refers
to
the
electrically
tunable
coloration
of
a
matter.
Emerging
see-through
color-tunable
applications
pose
synergetic
demand
on
electrochromic
device,
concurrently
having
ultralow
field
driving,
operation
in
transmissive
mode,
and
high-purity
interference
colors
sci-fi
perception.
However,
such
an
device
remains
elusive.
Herein,
we
invent
electro-interference-color
based
two-dimensional
titania
liquid
crystals
(2D
TiO
2
LCs),
demonstrating
record-high
electroresponse
sensitivity
~1.5
×
10
−7
square
meters
per
volt
among
all
wide-bandgap
media.
Consequently,
works
under
electric
6
3
volts
meter
(three
orders
magnitude
lower
than
that
conventional
operates
mode
with
~85%
transparency,
displays
pure
colors.
The
serves
as
good
example
fabricate
diverse
chromatic
conceptually
demonstrated
smart
windows
functions
privacy
protection,
energy
saving,
artistic
presentation
well
transparent
display.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 5, 2025
Photonic
materials
possess
tunable
optical
properties
and
have
been
widely
utilized
for
healthcare
applications.
These
enable
the
detection
of
physical
physiological
bio-signals
via
modulated
output
characteristics,
such
as
wavelength
shifts,
fluorescence
emission,
light
scattering.
When
further
synthesized
into
functional
photonic
inks,
multimodal
devices
epidermal,
minimally
invasive,
implantable
bio-sensing
can
be
constructed
in
facile
printable
manners.
This
review
first
introduces
different
geometries
their
unique
properties.
To
feasible
fabrication
multi-functional
biosensing
versatile
platforms,
synthesis
inks
as-printed
are
then
illustrated.
Subsequently,
advances
breakthroughs
to
construct
integrated
systems
wearable
applications
displayed,
especially
sensing
facilitate
personalized
remote
healthcare.
Finally,
challenges
achieving
mechanical
stability,
eliminated
degradation,
enhanced
biocompatibility
dynamic
biological
environments,
scalable
production
discussed,
along
with
prospects
toward
reliable
intelligent
