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
%).
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.
Journal of Physics Conference Series,
Год журнала:
2024,
Номер
2837(1), С. 012049 - 012049
Опубликована: Окт. 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.
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,
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
%).
