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 Materials Letters,
Journal Year:
2023,
Volume and Issue:
5(10), P. 2739 - 2746
Published: Sept. 8, 2023
Smart
sensors
capable
of
detecting
NH3
at
sub-ppb
levels
are
important
for
human
health
in
our
daily
life.
Here,
we
demonstrate
a
surface
acoustic
wave
(SAW)
sensor
based
on
ZnO@MXene
hybrid
heterostructure
ultrahigh
gas
detection
under
UV
illumination
room
temperature
(RT).
Under
illumination,
the
SAW
not
only
significantly
enhances
frequency
response
(Δf
≈
32.24
kHz/20
ppm)
but
also
effectively
improves
selectivity
with
low
limit
(89.41
ppb),
short
response/recovery
times
(92/104
s),
long-term
stability,
and
robust
sensitivity
various
relative
humidity
conditions
(dark)
to
RT.
These
unique
sensing
properties
might
be
attributed
enriched
functional
groups,
oxygen
vacancies,
excellent
charge
transfer
Schottky
barrier
via
band
bending,
which
is
explained
using
an
energy
theory
mechanism.
Overall,
current
study
offers
strategic
insights
designing
light-activated
high-performance
SAW-based
RT
safety
assurance
environmental
monitoring.
Chemosensors,
Journal Year:
2024,
Volume and Issue:
12(3), P. 43 - 43
Published: March 5, 2024
The
NH3
sensor
is
of
great
significance
in
preventing
leakage
and
ensuring
life
safety.
In
this
work,
the
Pd-decorated
ZnO
hexagonal
microdiscs
are
synthesized
using
hydrothermal
annealing
processes,
gas
fabricated
based
on
microdiscs.
gas-sensing
test
results
show
that
Pd-ZnO
has
a
good
response
to
gas.
Specifically,
it
linear
within
0.5–50
ppm
at
optimal
operating
temperature
230
°C.
addition,
exhibits
repeatability,
short
time
(23.2
s)
humidity
resistance
(10–90%
relative
humidity).
This
work
provides
useful
reference
for
developing
an
sensor.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(3), P. 3229 - 3238
Published: Jan. 29, 2024
Detecting
trace-level
nitrogen
dioxide
(NO2)
in
real
time
is
critical
due
to
its
adverse
impact
on
human
health
and
the
environment.
However,
achieving
a
fast
response,
high
sensitivity
selectivity,
excellent
stability
NO2
detection
remains
challenge.
Two-dimensional
(2D)
metal
chalcogenides
are
promising
for
gas
sensing,
but
their
practical
use
thwarted
by
issues
like
insufficient
recovery
poor
stability.
As
an
alternative,
it
anticipated
that
2D
oxychalcogenides,
emerging
class
of
gas-sensing
semiconductor
materials,
offer
favorable
characteristics.
In
this
work,
p-type
gallium
oxyselenide
nanosheets
tailored
with
various
oxygen
concentrations
synthesized
regulating
annealing
temperature
selenide.
We
find
sensor
based
GaSe0.31O0.69
exhibits
highest
response
58.28%
10
ppm
at
room
temperature.
addition,
has
more
than
times
higher
interfering
gases.
More
importantly,
material
exhibited
outstanding
long-term
(up
4
months)
demonstrated
reversible
This
work
paves
cost-effective
way
development
room-temperature
sensors,
exhibiting
exceptional
Sensors,
Journal Year:
2023,
Volume and Issue:
23(20), P. 8648 - 8648
Published: Oct. 23, 2023
With
a
rising
emphasis
on
public
safety
and
quality
of
life,
there
is
an
urgent
need
to
ensure
optimal
air
quality,
both
indoors
outdoors.
Detecting
toxic
gaseous
compounds
plays
pivotal
role
in
shaping
our
sustainable
future.
This
review
aims
elucidate
the
advancements
smart
wearable
(nano)sensors
for
monitoring
harmful
pollutants,
such
as
ammonia
(NH3),
nitric
oxide
(NO),
nitrous
(N2O),
nitrogen
dioxide
(NO2),
carbon
monoxide
(CO),
(CO2),
hydrogen
sulfide
(H2S),
sulfur
(SO2),
ozone
(O3),
hydrocarbons
(CxHy),
fluoride
(HF).
Differentiating
this
from
its
predecessors,
we
shed
light
challenges
faced
enhancing
sensor
performance
offer
deep
dive
into
evolution
sensing
materials,
substrates,
electrodes,
types
sensors.
Noteworthy
materials
robust
detection
systems
encompass
2D
nanostructures,
nanomaterials,
conducting
polymers,
nanohybrids,
metal
semiconductors.
A
dedicated
section
dissects
significance
circuit
integration,
miniaturization,
real-time
sensing,
repeatability,
reusability,
power
efficiency,
gas-sensitive
material
deposition,
selectivity,
sensitivity,
stability,
response/recovery
time,
pinpointing
gaps
current
knowledge
offering
avenues
further
research.
To
conclude,
provide
insights
suggestions
prospective
trajectory
nanosensors
addressing
extant
challenges.
