The Journal of Chemical Physics,
Journal Year:
2024,
Volume and Issue:
161(12)
Published: Sept. 23, 2024
Scintillators
are
materials
that
convert
ionizing
radiation
in
the
form
of
particles
or
photons
into
low-energy
ultraviolet
to
near-infrared
spectral
range.
This
work
reviews
efforts
use
colloidal
nanocrystals
as
scintillator
materials.
To
date,
research
on
scintillators
has
focused
doped
phosphor
systems,
quantum
dots
and
related
structures,
perovskite-based
nanocrystals.
Among
various
material
classes
forms,
semiconductor
stand
out
thanks
their
appealing
fluorescence
properties,
yet
understanding
radioluminescence
cathodoluminescence
is
incomplete.
review
discusses
fundamental
limits
design
challenges
toward
achieving
high
brightness,
fast
speed,
durable
performance
with
nanocrystal
scintillators.
First,
this
describes
basic
principles
efficiency
limitations
scintillation,
particularly
large
influence
multiple
exciton
generation
many
species,
well
metrics.
Second,
methods
for
measurement
described.
Third,
we
results
main
scintillators,
including
particles,
perovskites,
doped-phosphor
particles.
Fourth,
scintillation
imaging
discussed
terms
relevant
metrics
obtained
using
Finally,
note
strengths
weaknesses
discuss
potential
areas
further
development.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 21, 2025
Efficiency
and
emission
rate
are
two
traditionally
conflicting
parameters
in
radiation
detection,
achieving
their
simultaneous
maximization
can
significantly
advance
ultrafast
time-of-flight
(ToF)
technologies.
In
this
study,
it
is
demonstrated
that
goal
attainable
by
harnessing
the
giant
oscillator
strength
(GOS)
inherent
to
weakly
confined
perovskite
nanocrystals,
which
enables
superradiant
scintillation
under
mildly
cryogenic
conditions
align
seamlessly
with
ToF
It
shown
radiative
acceleration
due
GOS
encompasses
both
single
multiple
exciton
dynamics
arising
from
ionizing
interactions,
further
enhanced
suppressed
non-radiative
losses
Auger
recombination
at
80
K.
The
outcome
420
ps
lifetime
light
yield
of
≈10
000
photons/MeV
for
diluted
NC
solutions,
all
without
losses.
Temperature-dependent
light-guiding
experiments
on
test-bed
nanocomposite
scintillators
finally
indicate
light-transport
capability
remains
unaffected
accumulation
band-edge
GOS.
These
findings
suggest
a
promising
pathway
toward
developing
nanotechnological
optimized
output
timing
performance.
Journal of Applied Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 8, 2025
ABSTRACT
This
study
explores
the
scintillation
characteristics
of
Ce
3+
‐doped
YAG
nanoparticles
embedded
in
a
polystyrene
(PS)
matrix.
Composite
films
(YAG‐PS)
were
previously
synthesized
via
solvent
casting,
varying
YAG:Ce/PS
mass
ratio.
The
light
yield
(SLY)
was
assessed
using
comparative
approach,
where
nanocomposite
sample
detectors
irradiated
with
137
Cs
source
(662
keV)
and
measured
an
XP2020Q
photomultiplier
tube
as
photodetector,
NaI:Tl
single‐crystal
scintillator
serving
reference
detector.
Decay
kinetics
evaluated
Thomas
Bollinger
method,
while
coincidence
timing
resolution
determined
511
keV
annihilation
photons
from
22
Na
source.
findings
indicate
strong
correlation
between
SLY
synthesis
parameters,
optimal
23,780
±
4700
ph/MeV
achieved
at
YAG/PS
ratio
40
wt%.
Additionally,
fast
decay
component
improved
to
61
1.4
ns,
reached
674
ps,
demonstrating
enhanced
performance
for
radiation
detection.
highlights
influence
YAG:Ce
loading
on
properties
YAG‐PS
nanocomposites.
These
insights
provide
foundation
optimizing
scintillators
applications
such
detection
medical
imaging.
Abstract
Organic–inorganic
hybrid
manganese(II)
halide
glasses
exhibit
advantages
such
as
exceptional
optical
transparency,
straightforward
preparation
processes,
and
potential
for
large‐scale
production.
However,
the
crystallization
phenomenon
easily
occurring
in
this
glass
material
can
induce
a
marked
reduction
which
significantly
compromises
its
X‐ray
imaging
performance.
Herein,
cationic
substituent
regulation
strategy
is
developed
to
improve
glassy
stability
of
halides.
By
replacing
phenyl
group
Ph‐Mn
cation
with
methylcyclohexyl
substituent,
novel
MCy‐Mn
successfully
synthesized.
Such
substitution
effectively
weaken
both
cation–anion
interactions
π
–
stacking
within
lattice,
resulting
remarkable
melting
point
(T
m
).
Moreover,
inherent
rigid
structure
also
confers
an
elevated
transition
temperature
g
Consequently,
resultant
crystal
demonstrates
high
T
/T
ratio
0.82.
Besides,
fabricated
scintillation
exhibits
spatial
resolution
19.3
lp
mm
−1
has
achieved
3D
reconstruction.
As
anticipated,
outstanding
environmental
stability,
no
observed
after
being
exposed
atmospheric
conditions
30
days.
This
work
provides
valuable
insights
development
high‐stability
metal
glasses.
Nature-inspired
strategies
dominate
the
current
marine
green
antifouling;
nevertheless,
a
single
biomimetic
antifouling
strategy
has
limitations
in
static
or
dynamic
environment.
Inspired
by
fluorescent
corals
and
squids,
this
study
integrated
CsPbX3/CsPbBr3
(X
=
Cl
I)
perovskite
homojunctions
with
photocatalytic
properties
into
low-surface-energy
hydration-containing
polyurethane.
This
establishes
synergistic
mechanism
utilizing
fluorescence
catalysis
low
surface
energy
hydration
layer
while
further
exploring
regulatory
principles
of
performance
using
different
colored
fluorescence.
The
presence
facilitates
separation
transfer
homojunction
charge,
formation
hydrated
significantly
enhances
release
reactive
oxygen
species,
•O2-
1O2
free
radicals
playing
crucial
role.
In
addition,
coating
can
fluoresce
nine
colors,
blue-green
exhibiting
most
effective
properties.
is
attributed
to
higher
photon
blue
light,
which
stimulates
photosensitive
substances
within
bacteria
generate
damaging
cell
membranes
DNA
biofouling
thereby
achieving
an
effect.
research
thus
provides
promising
pathway
for
development
highly
efficient
coatings.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 8, 2024
Abstract
The
recent
emergence
of
quantum‐confined
nanomaterials
in
the
field
radiation
detection,
particular
lead
halide
perovskite
nanocrystals,
offers
scalability
and
performance
advantages
over
conventional
materials.
This
development
raises
fundamental
questions
about
mechanism
scintillation
itself
at
nanoscale
role
particle
size,
arguably
most
defining
parameter
quantum
dots.
Understanding
this
is
crucial
for
design
optimization
future
nanotechnology
scintillators.
In
work,
these
open
are
addressed
by
theoretically
experimentally
studying
size‐dependent
CsPbBr
3
nanocrystals
using
a
combination
Monte
Carlo
simulations,
spectroscopic,
radiometric
techniques.
results
show
that
simultaneous
effects
energy
deposition,
(multi‐)exciton
population,
light
emission
under
ionizing
excitation,
typical
confined
particles,
combine
to
maximize
efficiency
time
larger
due
greater
stopping
power
reduced
Auger
decay.
agreement
between
theory
experiment
produces
fully
validated
descriptive
model
predicts
yield
kinetics
without
free
parameters,
providing
guidance
rational
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 9, 2024
Abstract
Lead
halide
perovskite
nanocrystals
(LHP‐NCs)
incorporated
within
polymer
matrices
have
emerged
as
promising
materials
for
various
photonic
applications.
However,
challenges
persist
in
achieving
high‐quality
nanocomposites
due
to
low
monomer
conversion
yields,
restricted
LHP‐NCs
loadings,
and
difficulty
maintaining
NCs
integrity
post‐polymerization.
A
novel
protocol
synthesizing
LHP‐NCs/poly(methyl
methacrylate)
a
single
step
via
the
NC‐initiated
photoinduced
electron
transfer‐reversible
addition‐fragmentation
chain
transfer
(PET‐RAFT)
method
is
presented.
Polymerization
initiation
mediated
by
surfaces
under
blue
light
enables
fabrication
of
homogeneous
with
loadings
up
7%
w/w
≈90%
even
presence
oxygen.
This
process
preserves
optical
quality
passivates
surface
defects,
resulting
exhibiting
near
unity
luminescence
efficiencies.
The
potential
this
approach
producing
highly
loaded
radiation
detection
validated
radioluminescence
measurements
showing
yield
values
6000
ph
MeV
−1
fast
scintillation
dynamics
effective
lifetime
490
ps,
promise
time‐of‐flight
radiometry.
Journal of Physics Materials,
Journal Year:
2024,
Volume and Issue:
8(1), P. 015007 - 015007
Published: Dec. 12, 2024
Abstract
Cesium
lead
halide
nanocrystals
(NCs)
and
their
nanocomposites
have
attracted
a
lot
of
attention
in
the
field
radiation
detection
thanks
to
excellent
luminescent
properties,
especially
potential
for
fast
timing.
However,
most
research
on
focuses
low
loadings
(around
1
wt%)
which
is
insufficient
detecting
high-energy
X-rays
or
γ
-rays.
There
been
only
few
reports
exploring
materials
with
higher
but
all
limited
success
terms
transparency
final
material.
In
our
work,
we
present
cesium
NCs
loading
up
40
wt%.
We
employ
innovative
surface
functionalization
enhance
dispersion
within
matrix,
thereby
improving
material
transparency.
display
NC
matrix
using
confocal
photoluminescence
microscopy
then
characterise
radioluminescent
properties
bromide
(CPB)
bromochloride
varying
chloride
content.
To
asses
performance
as
detectors,
measure
timing
capabilities
under
X-rays.
Our
findings
reveal
significant
improvement
time
resolution
from
previously
published
300
ps
CPB
polymer
215
ps.
When
combined
increased
stopping
power
high
content,
this
advancement
holds
great
promise
practical
applications,
e.g.
time-of-flight
positron
emission
tomography
computed
energy
physics.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 23, 2024
Abstract
The
emerging
metal
halide
perovskites
are
challenging
the
traditional
scintillators
in
field
of
radiation
detection
and
radiography.
However,
they
lack
capability
for
remote
real‐time
monitoring
imaging
confined
hostile
conditions.
To
address
this
issue,
details
on
an
inorganic
scintillating
glass
fiber
incorporating
perovskite
quantum
dots
(QDs)
as
highly
efficient
pixelated
emitters
reported,
while
fibers
themselves
serve
at
same
time
low‐loss
waveguides,
enabling
long‐distance
underwater
X‐ray
detection.
multi‐color
emissions
controllable
sensitivities
endow
CsPbX
3
(X
=
Cl,
Br,
I)
QD
with
potential
wearable
visualized
indicators.
Furthermore,
these
can
be
regularly
arranged
into
a
array
plate
thickness
7.5
mm
to
enhance
absorption
imaging.
Leveraging
light‐guiding
character
fibers,
5
×
lengths
up
11
cm
has
demonstrated
This
study
offers
novel
platform
development
detectors
imagers
radiation.
