Journal of Optical Technology,
Journal Year:
2024,
Volume and Issue:
91(6), P. 429 - 429
Published: June 1, 2024
Subject
of
study.
Lead-free
perovskite
nanocrystals
(LFPNCs),
their
main
characteristics,
synthesis
methods,
and
optical
properties
are
examined.
Aim
The
aim
is
to
analyze
the
state-of-the-art
research
data
on
methods
LFPNCs.
In
addition,
formation
processes
LFPNCs,
dependence
nanocrystal
size
photoluminescence
quantum
yield
(PLQY)
parameters
(such
as
method,
temperature,
ligand
type)
determined.
Main
results.
LFPNCs
analyzed
based
LaMer
cluster
growth
models.
According
data,
primary
for
preparing
these
(NCs)
hot-injection
ligand-assisted
reprecipitation
(LARP).
Evidently,
average
increases
with
increasing
reaction
temperature.
For
NCs
synthesized
by
LARP,
temperature
100°C
leads
a
slight
decrease
in
yield.
However,
prepared
hot-injection,
PLQY
remains
independent
Additionally,
using
oleic
acid
results
narrow
distribution
NCs,
whereas
mixture
ligands
exhibiting
highest
PLQY.
Practical
significance.
literature
analysis
show
that
LARP
method
most
promising
synthesizing
owing
its
ease
implementation,
energy
efficiency,
scalability.
produced
this
can
be
applied
active
materials
sensor
technologies,
photovoltaics,
optoelectronic
devices.
Small,
Journal Year:
2024,
Volume and Issue:
20(47)
Published: Aug. 20, 2024
In
recent
years,
the
progress
toward
lighting
miniaturization
is
focused
on
luminescent
nanomaterials.
Among
them,
fluorescent
carbon
dots
(CDs)
are
receiving
increasing
attention
thanks
to
their
astonishing
optical
properties
complemented
by
intrinsic
biocompatibility
and
low
toxicity.
The
CDs
can
be
easily
dispersed
in
water,
organic
solvents
or
incorporated
polymeric
matrices,
preserving
emission
properties.
However,
relationship
between
structural
still
not
fully
elucidated,
motivating
a
consistent
research
effort
for
comprehension
of
features.
Nevertheless,
demonstrate
efficient
gain
materials
lasing,
high
quantum
yield
(QY),
tunability
visible
near
infrared
(NIR)
range,
short
lifetimes,
absorption
cross
section,
even
if
synthetic
reproducibility,
reaction
spectral
width
may
limit
effective
exploitation.
This
review
summarizes
latest
advancements
investigation
characteristic
that
make
laser
action
possible,
illustrating
geometries
lasing
random
both
solution
solid
state,
few
currently
demonstrated
breakthroughs.
While
journey
application
long,
potential
CD-based
sources
promising
various
technological
fields
futuristic
perspectives
will
discussed.
ACS Applied Bio Materials,
Journal Year:
2025,
Volume and Issue:
8(2), P. 1493 - 1502
Published: Jan. 31, 2025
Bioimaging
probes
based
on
carbon
dots
(CDs)
can
become
a
useful
replacement
for
existing
commercial
probes,
benefiting
clinical
diagnostics.
While
the
development
of
dual-mode
CD-based
magnetic
resonance
imaging
(MRI),
which
provides
ability
photoluminescence
(PL)
detection
at
same
time,
is
ongoing,
several
challenges
have
to
be
addressed.
First,
most
still
emit
shorter
wavelengths
(blue/green
spectral
range),
harmful
biological
objects
or
very
low
PL
intensity
in
window
tissue
transparency
(red/near-infrared
range).
Second,
relaxation
characteristics
proposed
are
similar
only
slightly
larger
than
those
contrast
agents.
Herein,
we
introduce
probe
allowing
simultaneous
and
MRI
analysis,
CDs
doped
with
gadolinium
ions
(Gd3+)
peak
red
(640
nm),
quantum
yield
up
24%,
high
longitudinal
transverse
relaxivities
reaching
25.76
40.57
L
mmol-1
s-1,
respectively.
Moreover,
Gd-doped
show
good
biocompatibility,
was
studied
H9c2
4T1
cell
lines
viability
above
70%.
The
developed
red-emissive
utilized
as
efficient
nontoxic
measurements
carried
out
simultaneously.
Nanomaterials,
Journal Year:
2025,
Volume and Issue:
15(4), P. 272 - 272
Published: Feb. 11, 2025
Nanomaterials,
including
quantum
dots,
have
gained
more
and
attention
in
the
past
few
decades
due
to
their
extraordinary
properties
that
make
them
useful
for
many
applications,
ranging
from
catalysis,
energy
generation
storage,
biotechnology,
medicine
informatics.
Mathematical
descriptions
of
phenomena
which
nanostructures
are
involved
great
demand
because
they
may
be
utilized
purpose
controlling
these
(e.g.,
growth
with
certain
sizes,
shapes,
other
properties).
Such
models
distinct
nature,
calculations
first
principles,
ordinary
partial
differential
equations,
machine
learning
(including
artificial
intelligence)
as
well.
The
aim
this
article
is
review
most
important
computational
mathematical
approaches
description
control
processes
involving
nanostructures.
Chemical Science,
Journal Year:
2025,
Volume and Issue:
16(10), P. 4195 - 4212
Published: Jan. 1, 2025
The
physico-chemical
properties
of
'bottom-up'
carbon
dots
synthesized
from
small
molecules
feature
both
generalities,
such
as
sp2-networked
and
core-surface
energy
transfer,
heterogeneities,
due
to
the
unpredictable
location
heteroatoms
often
non-crystalline
structure.
Here
we
focus
our
review
on
three
aspects
these
systems:
(1)
coupling
characterization
with
bottom-up
synthesis
identify
remove
confounding
byproducts
or
hydrogen-rich
polymers;
(2)
single-particle
obtain
unambiguous
information
highlight
distribution
around
ensemble
average;
(3)
electronic
structure
how
it
can
help
elucidate
origin
important
optical
absorption
fluorescence
a
heterogeneous
dots.
