Micro and Nanosystems,
Journal Year:
2024,
Volume and Issue:
16(4), P. 247 - 254
Published: Aug. 22, 2024
Background:
NiTi
(nickel-titanium)
alloy
wires
are
widely
used
in
orthodontics
due
to
their
unique
properties,
such
as
shape
memory
and
superelasticity.
However,
these
can
be
susceptible
corrosion
the
oral
environment,
which
compromise
mechanical
performance
longevity.
Zinc
tetraphenyl
porphyrin
(ZnTPP)
is
a
inhibitor
that
forms
protective
layer
on
aluminum
oxide
(Al2O3)
surface,
acting
barrier
against
corrosive
agents.
Objective:
The
electrodeposition
of
sacrificial
Al2O3
with
ZnTPP
was
carried
out
onto
Ni-
Ti
orthodontic
wire
enhance
resistance.
Methods:
10
mM
nitrate
dissolved
mL
0.1
M
phosphate
buffer
solution
(PBS),
an
electrolyte.
Firstly,
by
using
cyclic
voltammetry
potential
scanning
between
0
-2.0
V
at
scan
rate
50
mV/s
for
cycles.
Secondly,
1
PBS
ethanol
(1:1)
prepared
Electrodeposition
Al2O3/NiTi
achieved
through
window
Results:
ZnTPP/Al2O3/NiTi
displayed
potentiodynamic
polarization
resistance
412931
Ω,
high
stability
compared
bare
(396421
Ω).
Additionally,
measured
0.254
mm/year,
notably
lower
than
(0.540
mm/year).
This
decrease
attributed
presence
ZnTPP/Al2O3
film,
renders
electrically
insulative
significantly
increases
its
impedance
wire.
Conclusion:
bilayer
coating
has
proven
improve
wires.
Thus,
materials
considered
archwires
improved
stability.
Journal of Physics Conference Series,
Journal Year:
2024,
Volume and Issue:
2837(1), P. 012049 - 012049
Published: Oct. 1, 2024
Abstract
Nicotine
has
garnered
considerable
attention
in
health
science
due
to
its
increasing
detrimental
effects
on
human
health,
stemming
from
presence
as
a
neuroactive
compound
tobacco.
The
precise
identification
of
nicotine
biological
and
medical
samples
is
imperative
for
screening
patients
afflicted
with
neurodegenerative
diseases
resulting
tobacco
addiction.
This
research
endeavors
develop
facile
electrochemical
sensor
tailored
detection.
For
analysis,
glassy
carbon
electrode
(GCE)
was
modified
graphene/TiO
2
(Gr/TiO
)
nanocomposite.
Initially,
as-synthesized
Gr/TiO
nanocomposite
characterized
by
field-emission
scanning
electron
microscopy
(FE-SEM),
EDS,
E-Mapping,
UV-Visible
Spectroscopy.
Secondly,
GCE
prepared
which
displayed
high
electrocatalytic
activity
towards
physiological
condition.
new
showed
an
excellent
response
peak
currents
associated
the
oxidation
exhibited
linear
increase
relative
spiked
concentrations.
Finally,
fabricated
provided
satisfactory
stability,
reproducibility
during
analysis
nicotine.
Thus,
we
believe
that
this
composite
material
can
be
considered
development
sensors
detection
various
samples.
Nano LIFE,
Journal Year:
2024,
Volume and Issue:
15(02)
Published: July 11, 2024
Dopamine
(DA)
is
an
important
neurotransmitter
and
has
been
linked
to
several
neurological
diseases.
Due
its
biological
significance,
electrochemical
detection
of
dopamine
become
a
hot
topic
research.
Herein,
by
using
gold
nanoparticles
(Au
NPs)
made
through
green
synthesis,
we
demonstrate
unique
method
for
the
sensitive
DA.
A
Strobilanthes
kunthiana
leaves
extract
was
used
as
reducing
stabilizing
agent
during
sustainable
synthesis
Au
NPs.
Several
characterizations
including
UV–Visible
spectroscopy
(absorption
peak
at
540
nm),
Fourier-Transform
Infrared
Spectroscopy
(FT-IR),
X-Ray
Diffraction
(XRD),
Field
Emission
Scanning
Electron
Microscopy
(FE-SEM)
(average
particle
size
31
Energy
Dispersive
(EDAX),
Elemental
Mapping
(E-MAP)
Electrochemical
Impedance
(EIS)
have
characterize
synthesized
Moreover,
techniques
like
amperometry
Cyclic
Voltammetry
(CV)
were
confirm
stability
linearity
NPs-based
sensor
determination
The
linear
range
found
be
from
0.1
[Formula:
see
text]M
356
with
limit
text]M.
Results in Surfaces and Interfaces,
Journal Year:
2024,
Volume and Issue:
16, P. 100267 - 100267
Published: Aug. 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
%).
Journal of the Chinese Chemical Society,
Journal Year:
2024,
Volume and Issue:
71(8), P. 852 - 861
Published: Aug. 1, 2024
Abstract
The
application
of
iron
oxide
quantum
dots
(IOQDs)
in
this
study
led
to
the
development
a
straightforward,
easy,
and
selective
approach
for
cytosine
sensing.
To
examine
capability
IOQDs
detecting
nucleobases,
attempts
have
been
made
gain
insight
into
characteristics
IOQDs,
including
UV/Vis
spectroscopic
analysis,
infrared
spectroscopy,
fluorescence
transmission
electron
microscopy,
powder‐XRD.
We
introduced
with
mean
particle
size
distribution
5.71
±
0.08
nm
by
harnessing
turn‐on
phenomenon.
fostering
response
was
triggered
presence
cytosine.
In
comparison,
other
nucleobases
did
not
further
induce
signal
IOQDs.
It
concluded
that
hydrogen
bonding
bridging
carboxylate
hydroxyl
groups
on
surface
QDs
amine
results
elevation
fluorescence.
Micro and Nanosystems,
Journal Year:
2024,
Volume and Issue:
16(4), P. 247 - 254
Published: Aug. 22, 2024
Background:
NiTi
(nickel-titanium)
alloy
wires
are
widely
used
in
orthodontics
due
to
their
unique
properties,
such
as
shape
memory
and
superelasticity.
However,
these
can
be
susceptible
corrosion
the
oral
environment,
which
compromise
mechanical
performance
longevity.
Zinc
tetraphenyl
porphyrin
(ZnTPP)
is
a
inhibitor
that
forms
protective
layer
on
aluminum
oxide
(Al2O3)
surface,
acting
barrier
against
corrosive
agents.
Objective:
The
electrodeposition
of
sacrificial
Al2O3
with
ZnTPP
was
carried
out
onto
Ni-
Ti
orthodontic
wire
enhance
resistance.
Methods:
10
mM
nitrate
dissolved
mL
0.1
M
phosphate
buffer
solution
(PBS),
an
electrolyte.
Firstly,
by
using
cyclic
voltammetry
potential
scanning
between
0
-2.0
V
at
scan
rate
50
mV/s
for
cycles.
Secondly,
1
PBS
ethanol
(1:1)
prepared
Electrodeposition
Al2O3/NiTi
achieved
through
window
Results:
ZnTPP/Al2O3/NiTi
displayed
potentiodynamic
polarization
resistance
412931
Ω,
high
stability
compared
bare
(396421
Ω).
Additionally,
measured
0.254
mm/year,
notably
lower
than
(0.540
mm/year).
This
decrease
attributed
presence
ZnTPP/Al2O3
film,
renders
electrically
insulative
significantly
increases
its
impedance
wire.
Conclusion:
bilayer
coating
has
proven
improve
wires.
Thus,
materials
considered
archwires
improved
stability.
