Abstract
Optical
encryption
technology
demonstrates
significant
potential
for
advanced
information
security
applications
due
to
its
inherent
advantages
in
high‐speed
operation,
multidimensional
processing,
and
parallel
computation
capabilities.
However,
current
research
this
field
has
predominantly
focused
on
elementary
optical
anti‐counterfeiting
techniques
binary
coding
systems,
with
limited
exploration
of
sophisticated
methodologies.
In
study,
a
novel
strategy
is
presented
that
employs
NaYF
4
multilayer
core–shell
nanocrystals
enable
dynamic
full‐color
upconversion
(UC)
emission
modulation
under
single‐wavelength
excitation,
thereby
facilitating
high‐capacity
through
machine
learning
(ML)‐assisted
processing.
Through
systematic
investigation
UC
photophysical
mechanisms,
it
revealed
the
tunability
originates
from
both
excitation
power
dependence
pulse
width
sensitivity
mediated
by
rare
earth
ion
cross‐relaxation
processes.
The
rich
generated
these
mechanisms
been
systematically
organized
into
comprehensive
ML‐constructed
database,
functioning
as
an
“codebook”
protocols.
developed
ML
framework
exceptional
capability
identifying
subtle
signature
differences,
achieving
over
98%
recognition
accuracy
database
pattern
matching.
This
system
theoretically
enables
decryption
18
8
distinct
patterns.
These
findings
establish
new
paradigm
development
provide
critical
insights
advancing
next‐generation
systems.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 8, 2025
Abstract
In
this
study,
heterostructured
nanoparticles
based
on
lanthanide
double
perovskite
halide
are
innovatively
proposed,
which
dramatically
improved
quantum
yield
and
color
purity,
but
the
problem
of
water
stability
materials
has
also
been
solved.
The
without
surface
ligands
have
excellent
optical
properties
when
dispersed
in
water,
higher
purity
than
those
organic
solvents.
Besides,
application
potential
is
demonstrated
practical
performance
verified
by
preparing
luminescent
ink.
This
study
provides
a
new
strategy
for
enhancement
prospect
perovskite.
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(31), P. 9691 - 9699
Published: July 25, 2024
Multimodal
luminescent
materials
hold
great
promise
in
a
diversity
of
frontier
applications.
However,
achieving
the
multimodal
responsive
luminescence
at
single
nanoparticle
level,
especially
besides
light
stimuli,
has
remained
challenge.
Here,
we
report
conceptual
model
to
realize
by
constructing
both
mechanoluminescence
and
photoluminescence
nanoparticle.
We
show
that
lanthanide-doped
fluoride
nanoparticles
are
able
produce
excellent
through
X-ray
irradiation,
color-tunable
becomes
available
selecting
suitable
lanthanide
emitters
core–shell–shell
structure.
Furthermore,
design
multilayer
core–shell
nanostructure
enables
emissions
including
radioluminescence,
persistent
luminescence,
mechanoluminescence,
upconversion,
downshifting,
thermal-stimulated
simultaneously
under
multichannel
excitation
stimuli.
These
results
provide
new
insights
into
mechanism
induced
nanocrystals
contribute
development
smart
toward
imaging
encryption,
stress
sensing,
anticounterfeiting.
Chemical Reviews,
Journal Year:
2023,
Volume and Issue:
123(16), P. 10206 - 10257
Published: July 31, 2023
Using
compressive
mechanical
forces,
such
as
pressure,
to
induce
crystallographic
phase
transitions
and
mesostructural
changes
while
modulating
material
properties
in
nanoparticles
(NPs)
is
a
unique
way
discover
new
behaviors,
create
novel
nanostructures,
study
emerging
that
are
difficult
achieve
under
conventional
conditions.
In
recent
decades,
NPs
of
plethora
chemical
compositions,
sizes,
shapes,
surface
ligands,
self-assembled
mesostructures
have
been
studied
pressure
by
in-situ
scattering
and/or
spectroscopy
techniques.
As
result,
the
fundamental
knowledge
pressure–structure–property
relationships
has
significantly
improved,
leading
better
understanding
design
guidelines
for
nanomaterial
synthesis.
present
review,
we
discuss
experimental
progress
NP
high-pressure
research
conducted
primarily
over
roughly
past
four
years
on
semiconductor
NPs,
metal
oxide
perovskite
NPs.
We
focus
pressure-induced
behaviors
at
both
atomic-
mesoscales,
inorganic
property
upon
compression,
structural
pressure.
further
depth
molecular
modeling,
including
simulations
ligand
behavior,
phase-change
chalcogenides,
layered
transition
dichalcogenides,
boron
nitride,
hybrid
organic–inorganic
perovskites
These
models
now
provide
mechanistic
explanations
observations
predictive
future
design.
conclude
with
summary
our
insights
directions
exploration
transition,
coupling,
growth,
nanoelectronic
photonic
properties.
Materials Horizons,
Journal Year:
2023,
Volume and Issue:
11(2), P. 363 - 387
Published: Nov. 2, 2023
Wound
healing
is
a
complex
process
that
requires
effective
management
to
prevent
infections
and
promote
efficient
tissue
regeneration.
In
recent
years,
upconversion
nanoparticles
(UCNPs)
have
emerged
as
promising
materials
for
wound
dressing
applications
due
their
unique
optical
properties
potential
therapeutic
functionalities.
These
possess
enhanced
antibacterial
when
functionalized
with
agents,
helping
infections,
common
complication
in
healing.
They
can
serve
carriers
controlled
drug
delivery,
enabling
targeted
release
of
agents
the
site,
allowing
tailored
treatment
optimal
conditions.
ability
convert
near-infrared
(NIR)
light
into
visible
and/or
ultraviolet
(UV)
regions,
making
them
suitable
(photothermal
therapy
photodynamic
therapy)
diagnostic
applications.
context
healing,
these
be
combined
other
such
hydrogels,
fibers,
metal-organic
frameworks
(MOFs),
graphene
oxide,
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(15), P. 4580 - 4587
Published: April 4, 2024
Photon
upconverison
has
attracted
a
substantial
amount
of
interest
in
diverse
fields
due
to
its
characteristic
anti-Stokes
emissions.
However,
obtaining
intense
emission
under
low-power
laser
irradiation
remained
challenge.
Here
we
report
mechanistic
design
activator–sensitizer
alloyed
nanoparticles
achieve
bright
upconversion
weak
infrared
irradiation.
This
allows
nearest
sensitizer–activator
separation
facilitate
efficient
energy
transfer
that
results
remarkably
enhanced
(>2
orders
magnitude)
0.26
W
cm–2
compared
the
Er
sublattice,
and
quantum
yield
also
shows
20-fold
increase.
Interestingly,
exhibit
gradual
change
color
with
an
increase
Yb3+
content,
moreover,
their
colors
can
be
dynamically
controlled
by
simply
modulating
excitation
power
pulse
widths.
Such
show
great
promise
for
application
near-infrared
photodetector.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(11)
Published: Jan. 16, 2024
Abstract
The
development
of
blue/green/red
tricolor
upconversion
(UC)
phosphors
under
invisible
light
irradiation
has
attracted
significant
interest
in
emerging
applications
such
as
anti‐counterfeiting,
three‐dimensional
(3D)
optical
data
storage,
and
solid‐state
3D
displays.
In
this
study,
a
series
LiYO
2
:RE
3+
,Yb
(RE
=
Tm,
Ho,
Eu)
are
successfully
prepared
via
first
precipitation
process
followed
by
calcination,
completely
optimized
for
efficient
UC
luminescence
with
980
nm
laser
excitation.
Mechanisms
involving
two‐
or
three‐photon
absorption
processes
low‐phonon‐energy‐suppressed
multi‐phonon
relaxation
have
been
proposed
Ho
(Eu
)/Yb
Tm
/Yb
codoping,
respectively.
addition,
the
RE
(Yb
)
concentration‐induced
phase
transition
host
is
discussed
interesting
possibilities
spectral
regulation.
Based
on
broad
color
gamut
achieved
phosphor
mixture,
homochromatic
polychromatic
metamerisms
experimentally
fabricated
screen
printing
high‐level
anti‐counterfeiting
information
security.
Moreover,
proof‐of‐concept
demonstration,
prototypes
storage
volumetric
displays
constructed
embedding
mixtures
their
printed
patterns
polydimethylsiloxane.
It
believed
that
continuous
exploration
excitation
metamerism
can
promote
security
advanced
display
technologies.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(9), P. 11217 - 11227
Published: Feb. 22, 2024
Single
particle
tracking
(SPT)
is
a
powerful
technique
for
real-time
microscopic
visualization
of
the
movement
individual
biomolecules
within
or
on
surface
living
cells.
However,
SPT
often
suffers
from
suboptimal
performance
photon-emitting
labels
used
to
tag
interest.
For
example,
fluorescent
dyes
have
poor
photostability,
while
quantum
dots
suffer
blinking
that
hampers
track
acquisition
and
interpretation.
Upconverting
nanoparticles
(UCNPs)
recently
emerged
as
promising
anti-Stokes
luminescent
label
SPT.
In
this
work,
we
demonstrated
targeted
using
UCNPs.
this,
synthesized
30
nm
diameter
doped
UCNPs
coated
them
with
amphiphilic
polymers
decorated
polyethylene
glycol
chains
make
water-dispersible
minimize
their
nonspecific
interactions
Coated
highly
homogeneous
in
brightness
(as
confirmed
by
single
investigation)
were
functionalized
immunoglobulin
E
(IgE)
biotin−streptavidin
strategy.
Using
these
IgE-UCNP
labels,
tracked
high-affinity
IgE
receptors
(FcεRI)
membrane
RBL-2H3
mast
cells
at
37
°C
presence
absence
antigen
obtained
good
agreement
literature.
Moreover,
FcεRI-IgE
receptor-antibody
system
directly
compare
UCNP-based
organic
(AlexaFluor647)
(QD655).
Due
photostability
well
backgroundless
continuous
luminescence,
trajectories
UCNP
are
no
longer
limited
photophysics
but
only
dynamics
and,
particular,
out
field
view
and/or
focal
plane.
APL Materials,
Journal Year:
2024,
Volume and Issue:
12(3)
Published: March 1, 2024
The
luminescent
properties
of
some
materials
undergo
significant
changes
under
compression.
High
pressure
generated
by
a
diamond
anvil
cell
(DAC)
is
often
used
as
an
external
stimulus
to
explore
the
relationship
between
structures
and
materials,
provide
traceable
color
structural
changes,
quantify
environment
in
which
are
located.
Under
high
pressure,
luminous
intensity
or
has
important
potential
applications
fields
such
safety
detection,
information
storage,
optoelectronic
devices,
mechanical
sensing.
Recently,
many
phenomena
pressure-induced
luminescence
enhancement
have
been
discovered
DAC,
commonly
referred
emission
enhancement.
In
this
review,
recent
collected,
role
promoting
DAC
was
revealed
discussed,
helps
design
with
specific
characteristics
provides
perspective
for
in-depth
research
on
photophysical
behavior
materials.
