Chemistry of Materials,
Journal Year:
2019,
Volume and Issue:
31(23), P. 9887 - 9894
Published: Nov. 15, 2019
Compared
to
fluorescence
imaging
with
short-lived
emissive
probes,
the
use
of
phosphorescent
probes
conveys
advantage
long
signal
persistance
in
time
and
this
permits
one
discriminate
against
interference
from
autofluorescence.
However,
realization
room
temperature
phosphorescence
(RTP)
that
feature
ultralong
emission
lifetimes
aqueous
solution
is
still
a
challenge.
Here,
we
present
rational
strategy
for
realizing
RTP
air-saturated
media
carbon
dot-based
silica
composites
(CDs@SiO2)
which
as
1.64
s.
The
excellent
properties,
their
small
size,
water
solubility
make
CDs@SiO2
promising
material
biological
application.
We
demonstrate
efficient
reporters
both
plant
tissue
animal
cells
where
strong
autofluorescence
poses
severe
challenge
conventional,
short-lifetime
probes.
Nature Communications,
Journal Year:
2020,
Volume and Issue:
11(1)
Published: Nov. 5, 2020
Abstract
Room
temperature
phosphorescence
materials
have
inspired
extensive
attention
owing
to
their
great
potential
in
optical
applications.
However,
it
is
hard
achieve
a
room
material
with
simultaneous
long
lifetime
and
high
quantum
efficiency.
Herein,
multi-confined
carbon
dots
were
designed
fabricated,
enabling
ultralong
lifetime,
efficiency,
excellent
stability.
The
multi-confinement
by
highly
rigid
network,
stable
covalent
bonding,
3D
spatial
restriction
efficiently
rigidified
the
triplet
excited
states
of
from
non-radiative
deactivation.
as-designed
exhibit
5.72
s,
efficiency
26.36%,
exceptional
stability
against
strong
oxidants,
acids
bases,
as
well
polar
solvents.
This
work
provides
design
principles
universal
strategy
construct
metal-free
for
promising
applications,
especially
under
harsh
conditions.
Small,
Journal Year:
2021,
Volume and Issue:
18(2)
Published: Sept. 22, 2021
Abstract
Graphene
quantum
dot
(GQD)
is
one
of
the
youngest
superstars
carbon
family.
Since
its
emergence
in
2008,
GQD
has
attracted
a
great
deal
attention
due
to
unique
optoelectrical
properties.
Non‐zero
bandgap,
ability
accommodate
functional
groups
and
dopants,
excellent
dispersibility,
highly
tunable
properties,
biocompatibility
are
among
most
important
characteristics
GQDs.
To
date,
GQDs
have
displayed
significant
momentum
numerous
fields
such
as
energy
devices,
catalysis,
sensing,
photodynamic
photothermal
therapy,
drug
delivery,
bioimaging.
As
this
field
rapidly
evolving,
there
strong
need
identify
emerging
challenges
recent
advances,
mainly
because
some
novel
applications
innovations
on
ease
synthesis
not
systematically
reviewed
earlier
studies.
This
feature
article
provides
comparative
balanced
discussion
advances
synthesis,
Besides,
current
future
prospects
these
carbon‐based
nanomaterials
also
highlighted.
The
outlook
provided
review
points
out
that
research
boundless,
particularly
if
upcoming
studies
focus
purification
eco‐friendly
along
with
improving
photoluminescence
yield
production
ACS Applied Bio Materials,
Journal Year:
2019,
Volume and Issue:
2(6), P. 2317 - 2338
Published: May 6, 2019
Carbon
dots
(CDs)
are
relatively
new
and
one
of
the
most
propitious
nanomaterials
ever
known
to
humanity,
primarily
consisting
a
carbonized
carbon
core
with
heteroatoms
in
organic
functional
groups
attached.
CDs
show
various
fascinating
properties,
such
as
tunable
excitation/emission,
chemical
inertness,
photostability,
low
toxicity,
good
biocompatibility,
ease
handling,
eco-friendliness.
Due
anomalous
optical
properties
CDs,
they
have
wide
range
applications
fields
bioimaging,
biosensing,
photocatalysis,
optoelectronics,
etc.
In
this
Review,
we
intend
cover
many
strides
chemistry,
which
is
an
emerging
paradigm,
conjunction
recent
discoveries
near-infrared
fluorescence,
phosphorescence,
electroluminescence,
chirality,
antibacterial
activity.
Our
main
emphasis
will
be
on
contemporary
evolution
synthetic
strategies,
biomedical
nanomedicine
nanotheranostics.
Angewandte Chemie International Edition,
Journal Year:
2019,
Volume and Issue:
59(3), P. 1263 - 1269
Published: Nov. 12, 2019
Carbon
dots
(CDs)
with
dual-emissive,
robust,
and
aggregation-induced
RTP
characteristics
are
reported
for
the
first
time.
The
TA-CDs
prepared
via
hydrothermal
treatment
of
trimellitic
acid
exhibit
unique
white
prompt
yellow
emissions
in
solid
state
under
UV
excitation
(365
nm)
on
off,
respectively.
emission
powder
should
be
resulted
from
formation
a
new
excited
triplet
due
to
their
aggregation,
is
blue
fluorescence
dual-emissive
nature.
was
highly
stable
grinding,
which
very
rare
amongst
traditional
pure
organic
materials.
To
employ
TA-CDs,
advanced
anti-counterfeiting
information
encryption
methodologies
(water-stimuli-response
producing
RTP)
were
preliminarily
investigated.
Small,
Journal Year:
2020,
Volume and Issue:
16(48)
Published: Nov. 3, 2020
Abstract
Carbon‐based
quantum
dots
(CQDs),
including
spherical
carbon
and
graphene
dots,
are
an
emerging
class
of
photoluminescent
(PL)
materials
with
unique
properties.
Great
progress
has
been
made
in
the
design
fabrication
high‐performance
CQDs,
however,
challenge
developing
solid‐state
PL
CQDs
have
aroused
great
interest
among
researchers.
A
clear
mechanism
is
basis
for
development
light
emission
also
a
prerequisite
realization
multiple
practical
applications.
However,
extremely
complex
structure
CQD
greatly
limits
understanding
CQDs.
So
far,
variety
models
proposed
to
explain
but
they
not
unified.
This
review
summarizes
current
from
perspective
energy
band
theory
electronic
transitions.
In
addition,
common
strategies
realizing
summarized.
Furthermore,
applications
fields
light‐emitting
devices,
anti‐counterfeiting,
fingerprint
detection,
etc.,
proposed.
Finally,
brief
outlook
given,
highlighting
problems,
directions
Small,
Journal Year:
2020,
Volume and Issue:
16(19)
Published: April 13, 2020
Abstract
Carbon
dots
(CDs),
with
excellent
optical
property
and
cytocompatibility,
are
an
ideal
class
of
nanomaterials
applied
in
the
field
biomedicine.
However,
weak
response
CDs
near‐infrared
(NIR)
region
impedes
their
practical
applications.
Here,
UV–vis–NIR
full‐range
responsive
fluorine
nitrogen
doped
(N‐CDs‐F)
designed
synthesized
that
own
a
favorable
donor‐π‐acceptor
(D‐π‐A)
configuration
exhibit
two‐photon
(λ
ex
=
1060
nm),
three‐photon
1600
four‐photon
2000
nm)
excitation
upconversion
fluorescence.
D‐π‐A‐conjugated
prepared
by
solvothermal
synthesis
under
assistance
ammonia
fluoride
reported
endowed
larger
multiphoton
absorption
(MPA)
cross
sections
(3PA:
9.55
×
10
−80
cm
6
s
2
photon
−2
,
4PA:
6.32
8
3
−3
)
than
conventional
organic
compounds.
Furthermore,
N‐CDs‐F
show
bright
deep‐red
to
NIR
fluorescence
both
vitro
vivo,
can
even
stain
nucleoli
tumor
cells.
A
plausible
mechanism
is
proposed
on
basis
strong
inter‐dot
intra‐dot
hydrogen
bonds
through
NH···F
facilitate
expanding
conjugated
sp
domains,
thus
not
only
result
lower
highest
occupied
molecular
orbital‐lowest
unoccupied
orbital
energy
level
but
also
MPA
those
undoped
CDs.
Nanoscale,
Journal Year:
2018,
Volume and Issue:
11(14), P. 6584 - 6590
Published: Dec. 19, 2018
A
facile
synthetic
route
to
realize
RGB
full-color
ultralong
afterglow
and
triple-mode
emissions
in
carbon-dot-based
anti-counterfeiting
inks
was
developed
herein.
Angewandte Chemie International Edition,
Journal Year:
2019,
Volume and Issue:
59(25), P. 9986 - 9991
Published: Nov. 19, 2019
Abstract
Photoactivation
in
CdSe/ZnS
quantum
dots
(QDs)
on
UV/Vis
light
exposure
improves
photoluminescence
(PL)
and
photostability.
However,
it
was
not
observed
fluorescent
carbon
(CDs).
Now,
photoactivated
fluorescence
enhancement
fluorine
nitrogen
co‐doped
(F,N‐doped
CDs)
is
presented.
At
1.0
atm,
the
intensity
of
F,N‐doped
CDs
increases
with
UV
irradiation
(5
s–30
min),
accompanied
a
blue‐shift
emission
from
586
nm
to
550
nm.
exhibit
when
exposed
under
high
pressure
(0.1
GPa).
show
reversible
piezochromic
behavior
while
applying
increasing
(1.0
atm
9.98
GPa),
showing
pressure‐triggered
aggregation‐induced
range
atm–0.65
GPa.
The
broadens
versatility
ambient
high‐pressure
conditions
enhances
their
anti‐photobleaching.