Advanced Physics Research,
Journal Year:
2024,
Volume and Issue:
3(7)
Published: May 9, 2024
Abstract
High‐energy
blue
light
is
highly
detrimental
to
health
as
it
can
penetrate
the
lens
into
retina,
potentially
causing
atrophy
or
even
death
of
retinal
pigment
epithelial
cells.
To
prevent
harmful
effects
high‐energy
on
our
health,
here
preparation
a
photoconversion
film
specifically
designed
block
reported,
which
composed
green‐emissive
carbon
dots
(G‐CDs)
with
high
photoluminescence
quantum
yield
(PLQY
=
95%)
dispersed
in
polyvinyl
alcohol
(PVA)
matrix.
Notably,
such
(named
G‐CDs@PVA)
not
only
converts
an
incident
laser
short
wavelength
fluorescence
longer
wavelength,
but
also
exhibits
concentration‐dependent
(0,
10,
20,
and
30
wt.%)
barrier
rate
intensity.
With
increase
concentration
G‐CDs
film,
well
maximum
intensity
green
emission
are
increased.
When
reaches
wt.%,
G‐CDs@PVA
achieves
up
97%.
Furthermore,
attached
light‐emitting
diode
(LED)
chip
explore
its
practical
application
field
blocking
damage.
ChemElectroChem,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 6, 2025
Abstract
Electroanalytical
techniques
are
powerful
tools
in
biological
sensing
because
of
their
sensitivity
and
versatility.
In
recent
decades,
great
attention
has
been
given
to
the
fabrication
electroactive
nanomaterial‐based
biosensors.
this
context,
carbon
quantum
dots
(CQDs)
have
received
special
used
develop
many
sensors
remarkable
advantages
such
as
high
photostability,
solubility
stability
water,
biocompatibility,
photoluminescence
emission
intensities,
simple
methods
synthesis.
Since
they
very
small
size,
surface
area
volume
ratios
which
turn
can
allow
good
catalytic
activities
working
electrodes
electrochemical
reactions.
Being
motivated
by
these
advantages,
work
we
prepared
two
types
(CQD‐COOH
CQD‐NH
2
)
them
modify
screen
printed
(SPCEs)
for
detection
Troponin
I
(cTnI).
These
dot
–
modified
SPCE
immunosensors
offered
promising
results
determination
cTnI
with
a
limit
62
pg/mL
171
pg/mL,
respectively.
This
approach
sensor
design
further
offers
valuable
insights
into
construction
paper
based
new
carbon‐based
nanomaterials
other
biomarkers
various
diseases.
Research Square (Research Square),
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 13, 2025
Abstract
Carbon
quantum
dots
(CQDs)
with
photoluminescence
properties
have
been
widely
recognized,
however,
their
inherent
surface-enhanced
Raman
scattering
(SERS)
activity
is
rare
reported.
Herein,
we
propose
a
type
of
band-gap-tunable
CQDs
derived
from
metal-phenolic
network
(MPN)
that
exhibits
excellent
SERS
performance.
MPN-CQDs
may
be
the
ideal
nonmetallic
substrates
to
accurately
elucidate
chemical
mechanism
(CM)
due
simply
controllable
bandgap
structure.
By
screening
doped
metal
elements
MPN,
can
realize
optimal
effect
maximum
enhancement
factor
5.5×104,
also
exhibit
outstanding
reproducibility
and
stability.
We
then
systematically
disclose
interfacial
photo-induced
charge
transfer
process
corresponding
migration
pathways
between
analyte.
This
class
finally
applied
for
detection
hemoglobin
high
sensitivity;
further
combined
machine
learning
algorithm,
successfully
achieved
precise
identification
heterogeneity
hemoglobin.
first
evidence
tunable
performance
in
CQDs,
which
offers
facile
avenue
in-depth
understanding
CM
materials.
Journal of Spectroscopy,
Journal Year:
2025,
Volume and Issue:
2025(1)
Published: Jan. 1, 2025
A
novel
fluorescence
sensor
based
on
molybdenum‐doped
carbon
quantum
dots
(Mo‐CQDs)
was
developed
to
determine
lemon
yellow
in
beverages.
Mo‐CQDs
were
prepared
from
β‐cyclodextrin(carbon
source)
and
ammonium
molybdate
through
a
bottom‐up,
one‐step
hydrothermal
synthesis.
The
composition
structure
of
determined
using
transmission
electron
microscopy,
x‐ray
energy
spectrum
analysis,
FT‐IR.
amount
involved
the
reaction
pH
system
optimized
optimal
conditions.
quantitative
standard
curve
established
quenching
effect
Mo‐CQDs,
allowing
determination
beverage
samples.
experimental
results
show
that
successfully
at
180°Cover
24
h,
exhibiting
good
optical
properties.
Lemon
effectively
quenches
peak
460
nm
when
excited
330
phosphate
buffer
solution
(PBS,
=
6.0).
degree
presents
linear
relationship
between
0.10
100.00
μmol/L
(
R
2
0.9955),
detection
limit
is
0.03
S
/
N
3).
average
recovery
rate
actual
samples
102.05%,
relative
deviation
0.72%.
consistent
with
those
obtained
HPLC,
demonstrating
satisfactory
content
various
beverages,
suggesting
application
prospect.
The Analyst,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Carbon
dots
(CDs)
are
a
type
of
carbon-based
nanoparticle
(NP)
that
have
risen
in
popularity
due
to
their
unique
tuneable
physicochemical
and
optical
properties.
