Nanomaterials,
Год журнала:
2024,
Номер
14(24), С. 2008 - 2008
Опубликована: Дек. 14, 2024
In
the
growing
field
of
personalized
medicine,
non-invasive
wearable
devices
and
sensors
are
valuable
diagnostic
tools
for
real-time
monitoring
physiological
biokinetic
signals.
Among
all
possible
multiple
(bio)-entities,
pH
is
important
in
defining
health-related
biological
information,
since
its
variations
or
alterations
can
be
considered
cause
effect
disease
disfunction
within
a
system.
this
work,
an
innovative
(bio)-electrochemical
flexible
sensor
was
proposed
by
realizing
three
electrodes
(working,
reference,
counter)
directly
on
polyimide
(Kapton)
sheet
through
implementation
CO2
laser
writing,
which
locally
converts
polymeric
into
laser-induced
graphene
material
(LIG
electrodes),
preserving
inherent
mechanical
flexibility
Kapton.
A
uniform
distribution
nanostructured
PEDOT:PSS
deposited
via
ultrasonic
spray
coating
onto
LIG
working
electrode
as
active
sensing.
With
pH-sensitive
PEDOT
coating,
showed
good
sensitivity
defined
linear
Nernstian
slope
(75.6
±
9.1)
mV/pH,
across
range
from
1
to
7.
We
demonstrated
capability
use
during
dynamic
experiments,
thus
concluded
that
device
suitable
guarantee
immediate
response
repeatability
measuring
same
OCP
values
correspondence
with
applied.
Emergent Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 10, 2025
Abstract
Methanol,
a
toxic
volatile
compound,
poses
significant
threats
to
human
health
and
the
environment.
Traditional
methanol
sensors
require
high
operating
temperatures,
exhibit
poor
selectivity,
have
limited
long-term
stability,
which
restricts
their
application
in
portable
monitoring
devices.
This
study
proposes
flexible
chemoresistive
gas
sensor
based
on
laser-induced
graphene
(LIG)
electrodes
cobalt
phthalocyanine
(CoPc)-
multi-walled
carbon
nanotubes
(MWCNT)
composite.
Experimental
results
demonstrate
that
achieves
an
excellent
sensitivity
of
0.589
Ω/ppm
low
limit
detection
165
ppb
over
wide
range
10–1000
ppm,
covering
international
exposure
limits.
Moreover,
exhibits
selectivity
towards
comparison
other
interfering
organic
compounds
(e.g.,
ethanol,
isopropanol,
acetone).
Under
500
ppm
methanol,
response
time
(τ45)
is
5
s,
recovery
(τ85)
108
hysteresis
only
2.77%.
The
synergistic
effects
three-dimensional
porous
structure
LIG,
conductivity
MWCNT,
electron
transfer
characteristics
between
CoPc
molecules
collectively
optimize
charge
transport
adsorption
efficiency,
enabling
achieve
sensing
performance
at
room
temperature.
Additionally,
it
shows
also
outstanding
stability
30
days,
with
degradation
rate
less
than
4.25%.
These
attributes
indicate
LIG-CoPc/MWCNT
holds
great
potential
industrial
safety
environmental
applications
while
providing
critical
technological
support
for
development
high-performance,
low-power
sensors.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 15, 2025
Experimental
determination
of
band
structures
monolayer
transition
metal
dichalcogenides
(TMDCs)
is
crucially
important
in
the
design
and
tailoring
properties
TMDCs.
Resonant
tunneling
spectroscopy
(RTS)
an
effective
technique
to
probe
low-dimensional
systems
by
measuring
density
states
(DOS)
energy
dispersions.
Here,
we
report
investigation
structure
MoS2
(ML-MoS2)
a
gate-controlled
resonant
diode.
Three
distinct
kinks
are
observed
characteristic
current-voltage
curves
at
0.47,
0.70,
0.81
V,
respectively,
which
correspond
conduction
local
minimum
ML-MoS2
K,
Q1,
Q2
points.
When
applying
large
positive
gate
voltage
enhance
conductivity,
three
shift
lower
bias
0.10,
0.32,
0.39
excellent
agreement
with
theoretical
calculations.
Our
work
offers
more
precise
way
explore
electronic
TMDCs
using
RTS.
