Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 7, 2024
Abstract
Multimodal
upconversion
and
downshifting
circularly
polarized
luminescent
materials
hold
significant
potential
for
optical
anticounterfeiting
applications
due
to
their
exceptional
chiroptical
properties.
However,
constructing
these
within
a
single
emitter
remains
challenging.
In
this
study,
conceptual
model
of
multimodal
upconversion/downshifting
luminescence
(CPL)
is
realized
nanoparticle.
A
new
type
nanoparticles
with
multilayer
core–shell
architecture
fabricated,
capable
delivering
luminescence,
when
excited
by
980
nm
laser.
Utilizing
co‐assembly
strategy,
CPL
emission,
covering
broad
emission
range
from
ultraviolet
(UV)
the
second
near‐infrared
(NIR‐II)
region,
can
be
at
supramolecular
level.
These
properties
closely
follow
chirality
host
matrix
are
strongly
dependent
on
distribution
mode
films.
The
behavior
enabled
cutting‐edge
encryption
including
information
encryption.
This
work
introduces
novel
approach
designing
opens
avenues
development
functional
materials.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 13, 2025
Abstract
Halide
perovskites
(HPs),
emerging
as
a
noteworthy
class
of
semiconductors,
hold
great
promise
for
an
array
optoelectronic
applications,
including
anti‐counterfeiting,
light‐emitting
diodes
(LEDs),
solar
cells
(SCs),
and
photodetectors,
primarily
due
to
their
large
absorption
cross
section,
high
fluorescence
efficiency,
tunable
emission
spectrum
within
the
visible
region,
tolerance
lattice
defects,
well
adaptability
solution‐based
fabrication
processes.
Unlike
luminescent
HPs
with
band‐edge
emission,
trivalent
rare‐earth
(RE)
ions
typically
emit
low‐energy
light
through
intra‐4f
optical
transitions,
characterized
by
narrow
spectra
long
lifetimes.
When
fused,
cooperative
interactions
between
REs
endow
resulting
binary
composites
not
only
properties
inherited
from
parent
materials
but
also
introduce
new
attributes
unattainable
either
component
alone.
This
review
begins
fundamental
characteristics
REs,
followed
particular
focus
on
impact
electronic
structures
associated
energy
transfer
The
advanced
synthesis
methods
utilized
prepare
HPs,
RE‐doped
compounds,
are
overviewed.
Furthermore,
potential
applications
summarized
across
diverse
domains,
high‐fidelity
anticounterfeiting,
bioimaging,
LEDs,
photovoltaics,
photodetection,
photocatalysis,
conclude
remaining
challenges
future
research
prospects.
Nanoscale,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
The
luminescent
properties
of
β-Ga
2
O
3
:Dy
3+
enable
the
development
optical
PUF
tags
with
exceptional
encoding
capacity,
solar-blind
response,
and
thermal
stability,
making
them
highly
effective
for
anti-counterfeiting
encryption
applications.
ACS Applied Materials & Interfaces,
Journal Year:
2025,
Volume and Issue:
17(9), P. 14360 - 14366
Published: Feb. 19, 2025
Luminescent
encrypted
labels
can
effectively
solve
the
problem
of
counterfeiting.
However,
they
suffer
from
complex
design
and
fabrication,
low
space
utilization,
limited
capacity
information.
Herein,
we
create
multilayer
infrared
luminescent
encryption
using
femtosecond-laser-activated
Er-doped
silicon.
In
comparison
with
other
annealing
techniques
that
treat
whole
sample
at
once,
femtosecond
lasers
have
a
high
spatial
precision
flexibility,
which
locally
anneal
Si,
generating
stable
controllable
multilayered
photoluminescent
patterns.
It
therefore
significantly
enhance
security
increase
information
storage
capacity.
This
work
demonstrates
low-cost,
high-capacity,
high-security
label
great
application
value.
Fs-laser-annealed
silicon
is
also
promising
material
to
realize
quantum
light
sources
or
gain
materials
for
communication
band.
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.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 13, 2025
Abstract
Phosphorescent
materials
offer
a
promising
approach
to
information
encryption
due
their
long
luminescence
lifetimes
and
high
signal‐to‐noise
ratios.
However,
fixed
phosphorescent
patterns
are
vulnerable
imitation
over
time,
limiting
effectiveness
in
advanced
encryption.
Here,
time‐division
multiplexing
physical
unclonable
function
(TDM‐PUF)
label
utilizing
multicolor
carbon
dots
(CDs)
is
proposed
that
leverages
variations
wavelength
lifetime
construct
time‐resolved,
multidimensional
cryptographic
protocols.
Efficient
multi‐color
phosphorescence
CDs
achieved
by
enhancing
intersystem
crossing,
suppressing
non‐radiative
transitions
through
confinement
effects,
regulating
emission
spectra
via
energy
transfer.
The
random
spatial
distribution
unpredictable
emissions
of
significantly
enhance
the
complexity
PUF
system,
thereby
fortifying
its
defenses
against
mimicry
attacks.
Furthermore,
this
system
exhibits
multiple
optical
responses
allowing
correct
recognition
only
at
specified
time
nodes,
achieving
time‐resolved
anti‐counterfeiting.
Finally,
segmenting
labels
based
on
color
channels,
non‐overlapping
multi‐time
segments
achieved,
enabling
highly
secure
multiplexed
study
provides
competitive
anti‐counterfeiting
inspires
development
novel
strategies.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 7, 2024
Abstract
Multimodal
upconversion
and
downshifting
circularly
polarized
luminescent
materials
hold
significant
potential
for
optical
anticounterfeiting
applications
due
to
their
exceptional
chiroptical
properties.
However,
constructing
these
within
a
single
emitter
remains
challenging.
In
this
study,
conceptual
model
of
multimodal
upconversion/downshifting
luminescence
(CPL)
is
realized
nanoparticle.
A
new
type
nanoparticles
with
multilayer
core–shell
architecture
fabricated,
capable
delivering
luminescence,
when
excited
by
980
nm
laser.
Utilizing
co‐assembly
strategy,
CPL
emission,
covering
broad
emission
range
from
ultraviolet
(UV)
the
second
near‐infrared
(NIR‐II)
region,
can
be
at
supramolecular
level.
These
properties
closely
follow
chirality
host
matrix
are
strongly
dependent
on
distribution
mode
films.
The
behavior
enabled
cutting‐edge
encryption
including
information
encryption.
This
work
introduces
novel
approach
designing
opens
avenues
development
functional
materials.
Aggregate,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 5, 2024
ABSTRACT
Physically
unclonable
functions
(PUFs)
are
essential
for
anticounterfeiting.
Creating
high‐stability,
multimode,
and
secure
labels
remains
challenging.
Herein,
we
present
a
novel
self‐assembly
method
modulating
the
optical
signals
of
rare‐earth
(RE)
complexes
via
interactions
with
Ag
nanoparticles
(Ag‐NPs).
Initially,
engineered
positively
charged
Eu
3+
complex
([EuL
3
]
),
which
promotes
negatively
Ag‐NPs
to
form
Eu/Ag‐NPs
composites.
The
assembly
induces
surface
plasmon
effect
that
boosts
luminescent
quantum
yield
Raman
signal
intensities,
modifies
luminescence
lifetime
[EuL
.
Crucially,
these
micron‐scale
can
be
applied
substrates,
facilitating
high‐resolution
acquisition
diverse
information
encoding
within
limited
space.
Validation
experiments
reveal
PUF
crafted
using
exhibit
inherent
randomness
uniqueness,
along
stable
repeatable
output.
strategic
Ag‐NPs,
mediated
by
,
effective
modulation
material
properties,
paves
way
advancing
high‐resolution,
high‐information‐density
solutions
in
anticounterfeiting
technologies.
