ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(27), P. 32783 - 32791
Published: June 27, 2023
A
cost-effective
and
environmentally
friendly
approach
is
proposed
for
producing
N-
S-codoped
multicolor-emission
carbon
dots
(N-
MCDs)
at
a
mild
reaction
temperature
(150
°C)
relatively
short
time
(3
h).
In
this
process,
adenine
sulfate
acts
as
novel
precursor
doping
agent,
effectively
reacting
with
other
reagents
such
citric
acid,
para-aminosalicylic
ortho-phenylenediamine,
even
during
solvent-free
pyrolysis.
The
distinctive
structures
of
lead
to
the
increased
amount
graphitic
nitrogen
sulfur
in
MCDs.
Notably,
obtained
MCDs
exhibit
considerable
fluorescence
intensities,
their
emission
color
can
be
adjusted
from
blue
yellow.
observed
tunable
photoluminescence
attributed
variations
surface
state
N
S
contents.
Furthermore,
due
favorable
optical
properties,
good
water
solubility
biocompatibility,
low
cytotoxicity,
these
MCDs,
especially
green
dots,
are
successfully
applied
fluorescent
probes
bioimaging.
affordable
synthesis
method
employed
create
combined
remarkable
offers
promising
avenue
use
various
fields,
particularly
biomedical
applications.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2023,
Volume and Issue:
11(13), P. 5082 - 5092
Published: March 13, 2023
Using
biomass
materials
to
prepare
carbon
dots
(CDs)
has
received
significant
interest.
As
a
cheap
and
environmentally
friendly
material,
waste
leather
scrap
can
be
used
for
the
preparation
of
CDs
performance
tuning.
Herein,
is
as
precursor
reactant
fabricate
multicolor
(red,
green,
blue)
(R-CDs,
G-CDs,
B-CDs)
with
tunable
emission
wavelength
via
simple
one-step
hydrothermal/solvothermal
strategy
using
only
nitrogen
source
(p-phenylenediamine
or
o-phenylenediamine)
doping.
The
morphology,
structure,
optical
properties
were
investigated
by
transmission
electron
microscopy
(TEM),
Fourier-transform
infrared
(FT-IR)
spectroscopy,
X-ray
diffraction
(XRD),
Raman
ζ-potential
measurements,
photoelectron
spectroscopy
(XPS),
ultraviolet–visible
(UV–vis),
photoluminescence
(PL),
UV-differential
reflectance
(UV-DRS).
Results
showed
that
sizes
R-CDs,
B-CDs
are
10.0,
7.4,
2.5
nm,
respectively,
all
have
typical
crystal
plane
graphitic
structure
rich
in
chemical
groups
such
C═O,
−OH,
C–N,
etc.
detailed
characterization
comparison
three
types
confirm
size
functional
effectively
add
other
energy
levels
transitions
tuning
luminescent
CDs.
wavelengths
612,
535,
429
at
same
time,
calculated
UV–vis
DRS
2.11,
2.43,
2.58
eV,
respectively.
Because
stable
excellent
performance,
employed
ink
flexible
films.
utilization
renewable
scrap,
along
convenient
methods,
paves
way
sustainable,
cost-effective
synthesis
practical
applications
anti-counterfeiting.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(37)
Published: March 7, 2024
Abstract
Comprehensive
research
into
afterglow
emission
in
the
near‐infrared
(NIR)
region
of
carbon
dots
(CDs)
is
currently
lacking.
In
this
study,
highly
efficient
multicolor
CDs
are
synthesized
with
fluorescence
from
blue
to
NIR
using
Rhodamine
6G.
Boron
oxide
(B
2
O
3
)
employed
as
a
matrix
for
encapsulating
and
confining
CDs,
inhibiting
triplet
exciton
quenching.
Furthermore,
structural
rigidity
enhanced
due
formation
carbon‐boron
(C─B)
covalent
bonds
between
B
,
achieving
tunable
ranging
463
722
nm
lifetimes
up
801
ms.
The
green–yellow
composite
exhibits
an
impressive
quantum
yield
37.67%
while
demonstrating
thermally
activated
delayed
(TADF).
Thus,
coated
onto
alternating‐current
light‐emitting
diode
(BAC‐LED)
fabricate
white
AC‐LED,
which
successfully
prepared
Commission
Internationale
de
L'Eclairage
(CIE)
at
coordinates
(0.32,
0.34),
accompanied
by
color
rendering
index
(CRI)
reaching
81.1.
bright
compensates
zero‐point
flickering
BAC‐LED,
resulting
stable
gentle
emission.
potential
applications
these
luminescent
materials
optoelectronic
devices
undoubtedly
widened
remarkable
advancement.
Applied Physics Reviews,
Journal Year:
2024,
Volume and Issue:
11(2)
Published: April 19, 2024
Zero-dimensional
(0D)
nano-carbons,
including
graphene
quantum
dots,
nanodiamonds,
and
carbon
represent
the
new
generation
of
carbon-based
nanomaterials
with
exceptional
properties
arising
from
diverse
phenomena,
such
as
surface,
size,
edge
effects,
which
strongly
depend
on
carbon–carbon
bond
configuration
(sp2,
sp3,
a
mixture
sp2
sp3)
particle
size.
Their
unique
physicochemical
properties,
optical,
electronic,
magnetic,
reactivity,
catalytic
are
valuable
for
energy
conversion
storage,
sensing,
catalysis,
optoelectronic
devices,
modern
nanotechnologies,
biomedical,
many
other
applications.
This
review
aims
to
provide
insights
into
distinctive
effects
0D
nano-carbon
microstructures
their
that
crucial
cutting-edge
fundamental
studies
broad
range
multifunctional
The
key
synthesis
methods
different
types
nano-carbons
current
advances
characterization
computational
techniques
study
structures
structure–property
relationships
also
discussed.
concludes
status,
challenges,
future
opportunities
in
this
rapidly
developing
research
field.
Polymers,
Journal Year:
2022,
Volume and Issue:
14(11), P. 2153 - 2153
Published: May 25, 2022
Although
there
is
significant
progress
in
the
research
of
carbon
dots
(CDs),
some
challenges
such
as
difficulty
large-scale
synthesis,
complicated
purification,
low
quantum
yield,
ambiguity
structure-property
correlation,
electronic
structures,
and
photophysics
are
still
major
obstacles
that
hinder
commercial
use
CDs.
Recent
advances
modification,
characterization,
applications
CDs
summarized
this
review.
We
illustrate
examples
to
correlate
process
parameters,
compositions,
properties,
performances
CDs-based
materials.
The
synthesis
approach,
purification
methods,
modification/doping
methods
for
also
presented.
Moreover,
kilogram-scale
fabrication
given.
properties
performance
can
be
tuned
by
incubation
time
precursor
ratio,
laser
pulse
width,
average
molar
mass
polymeric
precursor.
Surface
passivation
has
a
influence
on
particle
sizes
factors
affect
CDs,
polarity-sensitive
fluorescence
effect
concentration-dependent
multicolor
luminescence,
together
with
size
surface
states
synchrotron
near-edge
X-ray
absorption
fine
structure
(NEXAFS)
test
been
proved
useful
tool
explore
correlation
among
structural
features,
photophysics,
emission
bioimaging,
sensing,
therapy,
energy,
fertilizer,
separation,
security
authentication,
food
packing,
flame
retardant,
co-catalyst
environmental
remediation
were
reviewed
article.
Furthermore,
roles
doped
their
composites
these
demonstrated.
ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(4), P. 2478 - 2490
Published: Feb. 6, 2023
Multicolor
carbon
dots
(MCDs)
have
been
receiving
great
attention
because
of
their
controllable
fluorescence,
which
can
be
applied
as
novel
optical
sources.
However,
the
preparation
MCDs
is
complex
and
corresponding
mechanism
still
unclear.
Here,
using
o-phenylenediamine
l-tryptophan
precursors,
a
facile
one-step
synthesis
(green,
yellow,
orange)
proposed
through
reaction
time
engineering
strategy.
The
structural
analyses
combined
with
theoretical
calculations
are
performed
to
disclose
synthetic
fluorescence
mechanisms
MCDs.
result
shows
that
increasing
improves
graphitization
degree
surface
states,
making
emission
wavelength
red-shifted.
In
addition,
white-emissive
CDs
(w-CDs)
easily
obtained
same
precursors.
structure
properties
w-CDs
further
confirm
importance
states
in
controlling
emissive
color
CDs.
Based
on
properties,
explored
for
water
detection
organic
solvents
multiple
anticounterfeiting/information
encryption.
Moreover,
multicolor
light-emitting
devices
(LEDs)
successfully
fabricated
based
MCD/PVP
composition
coated
365
nm
chips.
particular,
high-performance
white
(WLEDs)
directly
from
Commission
Illumination
(CIE)
coordinates
(0.32
0.35)
CRI
87.2,
similar
standard
w-LEDs.
ACS Sensors,
Journal Year:
2023,
Volume and Issue:
8(3), P. 1161 - 1172
Published: Feb. 16, 2023
Mitochondria
play
significant
roles
in
maintaining
a
stable
internal
environment
for
cell
metabolism.
Hence,
real-time
monitoring
of
the
dynamics
mitochondria
is
essential
further
understanding
mitochondria-related
diseases.
Fluorescent
probes
provide
powerful
tools
visualizing
dynamic
processes.
However,
most
mitochondria-targeted
are
derived
from
organic
molecules
with
poor
photostability,
making
long-term
challenging.
Herein,
we
design
novel
probe
based
on
carbon
dots
high
performance
tracking.
Considering
that
targeting
ability
CDs
related
to
surface
functional
groups,
which
generally
determined
by
reaction
precursors,
successfully
constructed
O-CDs
emission
at
565
nm
through
solvothermal
treatment
m-diethylaminophenol.
The
bright
quantum
yield
12.61%,
mitochondria-targeting
ability,
and
good
stability.
possess
(12.61%),
specific
outstanding
optical
Owing
abundant
hydroxyl
ammonium
cations
surface,
showed
obvious
accumulation
colocalization
coefficient
up
0.90
remained
steady
even
after
fixation.
Besides,
compatibility
photostability
under
various
interruptions
or
long-time
irradiation.
Therefore,
preferable
tracking
mitochondrial
behavior
live
cells.
We
first
observed
fission
fusion
behaviors
HeLa
cells,
then,
size,
morphology,
distribution
physiological
pathological
conditions
were
clearly
recorded.
More
importantly,
different
interactions
between
lipid
droplets
during
apoptosis
mitophagy
This
study
provides
potential
tool
exploring
other
organelles,
promoting
research
Chemical Engineering Journal,
Journal Year:
2023,
Volume and Issue:
470, P. 144042 - 144042
Published: June 20, 2023
Osteosarcoma
(OS),
the
most
common
pediatric
malignant
bone
tumor,
has
been
stagnant
in
its
current
treatment
status
due
to
highly
heterogeneous,
aggressive,
and
lethal
nature.
Herein,
we
developed
multi-element
charge-transfer
co-doped
carbon
dots
(CDs)
as
dual-mode
contrast
agents
for
OS
models
using
hydrothermal
carbonization.
The
obtained
P,
W
CDs,
W,
Hf
CDs-1,
CDs-2
have
high
long-wavelength
quantum
yields
(16.5,
27.3,
14.2%)
N,
N-dimethylformamide
solution,
which
can
be
attributed
presence
of
valence
electrons
doped
metal
ions
or
hydrochloride,
promotes
radiative
recombination
formation
holes.
Moreover,
CDs-1
exhibited
higher
biocompatibility,
good
143B
cell
imaging,
fluorescence/CT
imaging
performance
Balb/C
tumor-bearing
mice
compared
CDs-2.
In
addition,
biodistribution
pharmacokinetic
results
further
indicate
that
apparent
advantages
tracking
biosafety
excellent
potential
a
agent.
