Results in Surfaces and Interfaces,
Год журнала:
2024,
Номер
16, С. 100267 - 100267
Опубликована: Авг. 1, 2024
A
highly
sensitive
electrochemical
method
for
the
determination
of
L-
Cysteine
(L-cys)
was
developed
using
a
glassy
carbon
electrode
(GCE)
modified
with
composite
bimetallic
gadolinium
oxide
(Gd2O3)
and
stannous
(SnO2)
embedded
on
multi-walled
nanotubes
(MWCNT).
This
shows
excellent
electrocatalytic
activity
toward
oxidation
L-cys
in
phosphate
buffer
solution
(0.1
M,
pH
7).
The
proposed
showed
linear
range
0.011
μM–27.7
μM,
sensitivity
0.048
μA
μM−1
cm−2
detection
limit
(LOD)
5.993
nM.
X-Ray
diffraction
analysis
(XRD),
Field
Emission
Scanning
Electron
Microscopy
(FE-SEM),
Energy-Dispersive
X-ray
Analysis
(EDAX)
performed
to
characterize
all
synthesized
materials
prior
fabrication.
Linear
sweep
voltammetry
(LSV)
account
rise
anodic
peak
potential
concluding
current
conductivity.
Differential
pulse
(DPV)
also
confirm
results.
work
introduces
simple
easy
approach
L-cys.
Electrochemical
impedance
spectroscopy
(EIS)
Cyclic
(CV)
employed
fabricated
used
investigate
redox
properties
this
at
various
scan
rates.
low-cost
nanomaterial
has
wide
stability
reproducibility.
practical
applicability
sensor
confirmed
by
sensing
real
samples,
possessing
satisfactory
recoveries
(95.8
%
107.1
%).
Micro and Nanosystems,
Год журнала:
2024,
Номер
16(4), С. 255 - 263
Опубликована: Авг. 22, 2024
Background:
Green
synthesis
refers
to
the
environmentally
friendly
methods
of
producing
materials,
typically
using
sustainable
and
non-toxic
reagents.
Carbon
Quantum
Dots
(CQDs)
are
a
new
class
carbon
nanomaterials
composed
discrete,
quasi-spherical
nanoparticles
with
sizes
below
10
nm.
Objective:
The
CQDs
were
made
from
bark
Ficus
religiosa
(FR)
tree.
Barks
collected
FR
served
as
source
for
process
due
its
unique
bioactive
composition.
Methods:
tree
barks
collected,
completely
washed
ethanol
DI
H2O,
dried
at
50°C
in
hot
air
oven.
After
that,
was
cut
into
small
pieces
ground
well.
powder
(200
mg)
mixed
100
mL
H2O
heated
60°C
60
min.
transferred
an
autoclave
175°C
12
h.
Results:
UV-Vis,
FT-IR,
FE-SEM,
EDS,
elemental
mapping,
fluorescence
spectroscopy
used
characterization
CQDs.
Moreover,
showed
wide
emission
spectrum
ranging
280
400
nm
by
adjusting
excitation
wavelengths.
Fe3+
ions
had
higher
quenching
impact
on
compared
other
heavy
metal
ions.
Fluorescence
measurements
that
this
CQD-based
method
could
detect
lowest
limit
detection
(LOD)
2.07
μM
linear
0-70
Fe3+.
Conclusion:
This
novel
fluorescent
CQDs-based
be
selective
real-world
water
samples.
Micro and Nanosystems,
Год журнала:
2024,
Номер
16(3), С. 183 - 189
Опубликована: Июнь 20, 2024
Background:
Nickel-titanium
(NiTi)
orthodontic
wires
are
widely
used
in
dental
corrective
procedures
due
to
their
high
mechanical
properties
and
cost-effectiveness.
However,
they
prone
oral
corrosion,
leading
deterioration,
aesthetic
issues,
potential
health
concerns.
Objective:
This
study
aims
improve
the
corrosion
resistance
durability
of
NiTi
by
employing
zirconium
dioxide
(ZrO2)
Nafion
coating
with
goal
enhancing
wire
performance.
Methods:
Two
types
were
evaluated:
a
standard,
unmodified
as
control
another
treated
electrodeposited
ZrO2
film
(Naf)
coating.
Surface
analysis
was
conducted
using
various
techniques,
including
Field
Emission
Scanning
Electron
Microscopy
(FESEM)
Energy
Dispersive
X-ray
Spectroscopy
(EDX)
analysis.
Results:
The
uncoated
exhibited
rate
4.436×
10-1
mm/year,
whereas
Naf/ZrO2-coated
showed
4.068×
indicating
that
Naf/ZrO2
acted
protective
layer.
Additionally,
layer
provided
poor
electrical
conductivity,
resulting
slightly
higher
impedance
compared
bare
NiTi.
served
barrier,
which
significantly
enhanced
improved
lifespan.
Conclusion:
Electro-modification
through
deposition
overall
wires,
offering
promising
advancement
for
use
orthodontics.
underscores
enhance
longevity
wires.
