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.
Micro and Nanosystems,
Journal Year:
2024,
Volume and Issue:
16(3), P. 183 - 189
Published: June 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.
Luminescence,
Journal Year:
2024,
Volume and Issue:
39(8)
Published: Aug. 1, 2024
Abstract
Since
the
beginning
of
nanoscience
and
nanotechnology,
carbon
dots
(CDs)
have
been
foundational
idea
dominated
growth
nano‐field.
CDs
are
an
intriguing
platform
for
utilization
in
biology,
technology,
catalysis,
other
fields
thanks
to
their
numerous
distinctive
structural,
physicochemical,
photochemical
characteristics.
several
already
created,
they
assessed
based
on
synthesis
process,
luminescence
Due
biocompatibility,
less
toxic
effects,
most
significantly
fluorescent
features
contrast
nanostructures,
benefits.
This
review
focuses
recent
advancements
characterization,
applications,
techniques
used
made
from
natural
sources.
It
will
also
direct
scientists
creation
a
technique
adjustable
that
is
more
practical,
effective,
environmentally
benign.
With
low
toxicity
cost,
meeting
new
era's
requirements
selectivity
sensitivity
detection
sensing
various
things,
such
as
biomaterial
sensing,
enzymes,
chemical
contamination,
temperature
sensing.
Its
variety
properties,
optical
chemiluminescence,
morphological
analysis,
make
it
good
option
use
bioimaging,
drug
delivery,
biosensors,
cancer
diagnosis.
Micro and Nanosystems,
Journal Year:
2024,
Volume and Issue:
16(4), P. 255 - 263
Published: Aug. 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.
