Accounts of Chemical Research,
Journal Year:
2024,
Volume and Issue:
57(19), P. 2928 - 2939
Published: Sept. 19, 2024
ConspectusCarbon
dots
(CDs),
as
a
novel
type
of
fluorescent
nanocarbon
material,
attract
widespread
attention
in
nanomedicine,
optoelectronic
devices,
and
energy
conversion/storage
due
to
their
excellent
optical
properties,
low
toxicity,
high
stability.
They
can
be
classified
graphene
quantum
dots,
carbon
carbonized
polymer
(CPDs).
Among
these,
CPDs
exhibit
tunable
structures
components
that
allow
fine-tuning
making
them
one
the
most
popular
types
CDs
recent
years.
However,
structural
complexity
stimulates
deep
exploration
relationship
between
unique
structure
luminescent
performance.
As
an
organic-inorganic
hybrid
system,
diversity
self-limited
state
cores
polymer-hybrid
shell
layers
makes
understanding
underlying
mechanisms
structure-property
relationships
very
challenging
task.
In
this
context,
elucidating
composition
factors
affect
properties
is
vital
if
enormous
potential
realized.
Achieving
controllable
with
predefined
via
adoption
specific
functionalization
strategies
prized
goal
current
researchers
field.In
Account,
we
describe
efforts
made
by
our
group
synthesis,
mechanism
analysis,
regulation,
functional
applications
CPDs,
particular
emphasis
on
design
core-shell
tailored
for
fields
optoelectronics
energy.
Specifically,
through
rational
selection
precursors,
optimization
reaction
conditions,
postmodification
have
demonstrated
it
possible
regulate
both
core
layers,
thereby
achieving
full-spectrum
emission,
yield,
persistent
luminescence,
thermally
activated
delayed
fluorescence,
laser
action
CPDs.
Furthermore,
established
structure-performance
proposed
universal
strategy
synergistic
interactions
carbon-based
surface
micronanostructures.
addition,
unveiled
luminescence
cross-linked
specifically
"cross-linking
synergistically
inducing
quantum-state
luminescence",
which
addresses
challenge
efficient
circularly
polarized
liquid
solid
phases
Subsequently,
strong
cross-linking,
dual-rigidity,
ordering
preparation
methods
were
introduced,
pioneering
emission
from
blue
near-infrared
wavelengths.
Additionally,
developed
new
"confined
composite
nanocrystals
CPDs",
leading
various
high-performance
hydrogen
evolution
catalysts
water
electrolysis.
The
not
only
possessed
but
also
enabled
efficiencies
field
conversion,
thus
maximizing
utilization
Finally,
discuss
important
trends
CPD
research
development.
Overall,
Account
summarizes
latest
advancements
years,
providing
case-studies
enable
structure-property-performance
regulation
guiding
future
expansion
application
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 23, 2024
Abstract
Highly
luminescent
carbon
dots
(CDs)
have
garnered
significant
attention
and
are
increasingly
utilized
in
various
fields.
Despite
its
importance,
there
has
been
a
lack
of
comprehensive
reviews
focusing
specifically
on
highly
CDs.
It
is
aimed
here
to
fill
that
gap
by
exploring
CDs
with
high
photoluminescence
quantum
yield
(PLQY),
starting
an
examination
the
mechanisms
underlying
The
selection
synthetic
raw
materials
preparation
methods
along
research
progress
reviewed
information
across
bands
then
statistically
summarized
several
tables.
Subsequently,
structural
features,
synthesis
methods,
purification
strategies
lead
PLQY
based
analyzing
collected
examples
Furthermore,
luminescent‐based
multifunctional
applications
bioimaging,
light‐emitting
diodes,
solar
concentrators,
lasers
introduced.
Finally,
current
landscape
evaluated,
existing
challenges
identified,
feasible
directions
proposed
for
future
development.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 2, 2025
Abstract
The
absence
of
the
enhancement
fluorescence
in
carbon
dots
(CDs)
through
doping
with
transition
metal
atoms
(TMAs)
hinders
advancement
multi‐modal
bio‐imaging
CDs
high
photoluminescence
quantum
yield
(PLQY).
Herein,
Mn‐atomically‐doped
R‐CDs
(R‐Mn‐CDs)
a
PLQY
41.3%
water
is
presented,
enabling
efficient
vivo
dual‐mode
fluorescence/magnetic
resonance
(MR)
imaging.
comprehensive
characterizations
reveal
that
incorporation
Mn
leads
to
Mn‐N
2
O
coordinating
structure,
resulting
five
significant
effects:
an
increase
sp
conjugation
domains,
reduction
band
gap,
decreased
oxidation
level,
photo‐excited
electron
numbers,
and
suppression
non‐radiative
relaxation
pathways.
Collectively,
these
factors
contribute
remarkable
R‐Mn‐CDs.
Additionally,
also
endows
R‐Mn‐CDs
superior
MR
imaging
capabilities
due
to,
which
highlights
their
promising
prospect
as
dual‐modal
platform
for
fluorescence/MR
Furthermore,
findings
indicate
introduction
various
TMAs,
such
Mn,
Zn,
Ni,
Cu,
can
universally
improve
water‐soluble
construction
TMAs─O
bonds.
This
research
provides
valuable
theoretical
insights
into
mechanisms
underlying
induced
by
TMAs
offers
guidance
future
design
CDs.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 17, 2025
Abstract
Carbon
dots
(CDs)
serve
as
a
novel,
non‐toxic,
cost‐effective,
and
highly‐stable
solution‐processable
nanolaser
material.
However,
compared
to
commonly
used
commercial
laser
dyes,
CDs
exhibit
lower
photoluminescence
quantum
yields
(PLQYs),
radiation
transition
rates,
gain
coefficients.
Consequently,
this
leads
higher
thresholds
that
significantly
impede
the
expansion
of
practical
applications
for
CDs.
Therefore,
enhancing
performance
is
crucial
in
guiding
design
CD
materials
promoting
their
applications.
Herein,
Rhodamine
B
(RhB)
employed
sole
precursor
synthesis
full‐color
(FCDs)
with
vibrant
blue,
green,
yellow,
red,
NIR
(denoted
B‐CDs,
G‐CDs,
Y‐CDs,
R‐CDs,
NIR‐CDs)
fluorescence
through
cross‐linking,
polymerization,
carbonization
processes.
The
(PL)
spectra
ranged
from
434
703
nm.
Notably,
PLQYs
FCDs
are
improved
due
cross‐linked
enhanced
emission
(CEE)
effects.
Green,
achieved
exhibited
superior
stabilities
than
RhB.
Furthermore,
cytotoxicity
tests
confirm
possess
toxicity
This
study
not
only
validates
applicability
CEE
developing
multicolor
but
also
advances
application
miniaturized
lasers
based
on
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
Abstract
Biological
lasers,
representing
innovative
miniaturized
laser
technology,
hold
immense
potential
in
the
fields
of
biological
imaging,
detection,
sensing,
and
medical
treatment.
However,
reported
gain
media
for
lasers
encounter
several
challenges
complex
preparation
procedures,
high
cost,
toxicity
concerns,
limited
biocompatibility,
stability
issues
along
with
poor
processability
tunability.
These
drawbacks
have
impeded
sustainable
development
lasers.
Carbon
dots
(CDs),
as
a
novel
solution‐processable
materials
characterized
by
facile
preparation,
low
toxicity,
excellent
stability,
easy
modification,
luminescence
tuning
capabilities
outstanding
performance.
Consequently,
they
find
extensive
applications
diverse
such
biology,
photoelectricity,
Henceforth,
are
particularly
suitable
constructing
This
paper
provides
comprehensive
review
on
classification
application
existing
while
emphasizing
advantages
CDs
compared
to
other
media.
Furthermore,
it
presents
latest
progress
made
utilizing
forecasts
both
promising
prospects
based
CDs.
study
aims
enhance
understanding
CD
foster
advancements
field
Small Structures,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 15, 2024
Carbon
dots
(CDs)
have
attracted
much
attention
for
applications
in
photonics
and
optoelectronics
because
of
their
high
emission
efficiency
ease
synthesis.
Although
studies
solution
are
well
established,
solid‐state
less
common
optical
quenching
phenomena
that
critically
affect
CDs.
Herein,
the
synthesis
amorphous
CDs
from
citric
acid,
operating
as
hosts
dye
molecules,
incorporation
into
organic–inorganic
silica
matrices
through
a
fast
photo‐induced
polymerization
process
reported.
The
photocurable
sol
composition
allows
easy
dispersion
nanometer‐sized
scattering
centers,
such
titania
or
gold
nanoparticles
(NPs),
which
been
incorporated,
along
with
CDs,
nanocomposites.
combination
high‐brightness
nanoscatterers
hybrid
achieving
investigating
random
lasing
processes
occurring
orange‐red
range
visible
spectrum.
In
situ‐grown
NPs
contribute
to
significant
improvement
lasing,
enabling
an
narrow
5
nm
laser
threshold
low
0.3
mJ
pulse
−1
.
present
approach
reveals
technological
scientific
potential
when
embedded
disordered
active
media.
Currently,
carbon
dots
(CDs)
with
room-temperature
phosphorescence
(RTP)
show
bright
prospects
in
multiple
fields,
owing
to
their
tunable
wavelengths
and
large
Stokes
shifts.
Howbeit,
obtaining
the
long-lived
efficient
RTP
of
CDs
still
encounters
a
different
kind
challenge.
Here,
we
originally
prepared
(CDs@β-GPA)
β-guanidinopropionic
acid
diethylenetriamine
pentamethylene
phosphonic
acid,
CDs@β-GPA
exhibited
obvious
green
when
fixed
on
filter
paper.
Importantly,
introduction
boric
(BA)
into
resulted
stabilized
triplet
excitons
by
forming
composite
CDs@β-GPA/BA
through
covalent
coupling,
optical
band
gap
was
effectively
reduced
nonradiative
transitions
were
inhibited,
thus
leading
significantly
prolonged
lifetime
up
1.35
s.
Meanwhile,
also
acquired
phosphorescent
emission
excited
visible
light.
This
strategy
may
broaden
approaches
produce
long-lifetime
high-efficiency
material.
Moreover,
successfully
employed
fields
fingerprint
detection
advanced
information
encryption.
