Sensors,
Journal Year:
2024,
Volume and Issue:
24(2), P. 405 - 405
Published: Jan. 9, 2024
We
discuss
the
implementation
challenges
of
gas
sensing
systems
based
on
low-frequency
noise
measurements
chemoresistive
sensors.
Resistance
fluctuations
in
various
materials,
a
frequency
range
typically
up
to
few
kHz,
can
enhance
by
considering
its
intensity
and
slope
power
spectral
density.
The
issues
resistive
sensors,
specifically
two-dimensional
materials
exhibiting
gas-sensing
properties,
are
considered.
present
measurement
setups
noise-processing
methods
for
detection.
sensors
show
DC
resistances
requiring
different
flicker
approaches.
Separate
used
hundred
kΩ
with
much
higher
values.
Noise
highly
(e.g.,
MoS2,
WS2,
ZrS3)
prone
external
interferences
but
be
modulated
using
temperature
or
light
irradiation
enhanced
sensing.
Therefore,
such
considerable
interest
ACS Omega,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 16, 2025
Monitoring
ultralow
nitrogen
dioxide
(NO2)
concentrations
is
crucial
for
air
quality
management
and
public
health.
However,
the
existing
NO2
gas
sensors
have
several
defects,
like
high
cost
power
consumption,
exhibit
poor
selectivity.
This
study
addresses
these
challenges
by
presenting
a
novel
hexadecafluorinated
iron
phthalocyanine-reduced
graphene
oxide
(FePcF16-rGO)
covalent
hybrid
sensor
detection.
innovative
approach,
which
overcomes
limitations
of
fabrication
cost,
energy
efficiency,
selectivity,
significant
step
forward
in
technology.
The
demonstrates
exceptional
sensitivity
toward
(15.14%
response
100
ppb)
with
rapid
60
s
UV
light-induced
recovery.
Additionally,
exhibits
selectivity
NO2,
achieving
limit
detection
(LOD)
8.59
ppb.
approach
paves
way
developing
cost-effective,
energy-efficient,
miniature
monitoring
devices
improved
environmental
enhanced
safety
workplaces
where
exposure
concern.
Sensors,
Journal Year:
2025,
Volume and Issue:
25(4), P. 1208 - 1208
Published: Feb. 16, 2025
The
Cr-doped
CeO2
nanomaterials
were
prepared
by
a
simple
hydrothermal
method.
Morphological
analysis
revealed
that
Cr
doping
altered
the
morphology
and
size
of
particles.
Gas
sensing
tests
results
showed
Cr/Ce-2
has
highest
response
(Ra/Rg
=
15.6
@
10
ppm),
which
was
12.58
times
higher
than
pure
sensor.
Furthermore,
optimal
operating
temperature
reduced
from
210
°C
to
170
°C.
sensor
also
displayed
outstanding
repeatability
gas
selectivity.
improved
performance
can
be
attributed
its
smaller
grain
porosity
compared
CeO2.
In
addition,
oxygen
vacancies
played
pivotal
role
in
improving
gas-sensing
performance.
present
work
provides
new
CeO2-based
gas-sensitive
material
for
detection
n-butanol.
Sensors,
Journal Year:
2024,
Volume and Issue:
24(2), P. 405 - 405
Published: Jan. 9, 2024
We
discuss
the
implementation
challenges
of
gas
sensing
systems
based
on
low-frequency
noise
measurements
chemoresistive
sensors.
Resistance
fluctuations
in
various
materials,
a
frequency
range
typically
up
to
few
kHz,
can
enhance
by
considering
its
intensity
and
slope
power
spectral
density.
The
issues
resistive
sensors,
specifically
two-dimensional
materials
exhibiting
gas-sensing
properties,
are
considered.
present
measurement
setups
noise-processing
methods
for
detection.
sensors
show
DC
resistances
requiring
different
flicker
approaches.
Separate
used
hundred
kΩ
with
much
higher
values.
Noise
highly
(e.g.,
MoS2,
WS2,
ZrS3)
prone
external
interferences
but
be
modulated
using
temperature
or
light
irradiation
enhanced
sensing.
Therefore,
such
considerable
interest
