Nanomaterials,
Journal Year:
2024,
Volume and Issue:
14(8), P. 719 - 719
Published: April 19, 2024
Nowadays,
metal
oxide
semiconductor
gas
sensors
have
diverse
applications
ranging
from
human
health
to
smart
agriculture
with
the
development
of
Internet
Things
(IoT)
technologies.
However,
high
operating
temperatures
and
an
unsatisfactory
detection
capability
(high
sensitivity,
fast
response/recovery
speed,
etc.)
hinder
their
integration
into
IoT.
Herein,
a
ternary
heterostructure
was
prepared
by
decorating
WO3
nanoplates
Au
SnO2
nanoparticles
through
facial
photochemical
deposition
method.
This
employed
as
sensing
material
for
3-hydroxy-2-butanone
(3H-2B),
biomarker
Listeria
monocytogenes.
These
Au/SnO2–WO3
nanoplate-based
exhibited
excellent
response
(Ra/Rg
=
662)
25
ppm
3H-2B,
which
24
times
higher
than
that
pure
at
140
°C.
Moreover,
3H-2B
sensor
showed
ultrafast
recovery
speed
well
selectivity.
performances
could
be
attributed
rich
active
interfaces
transport
carriers
in
nanoplates.
Furthermore,
wireless
portable
equipped
assembled,
tested
using
known
concentrations
study
possibilities
real-time
monitoring
food
quality
safety.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: June 13, 2023
Highly
efficient
gas
sensors
able
to
detect
and
identify
hazardous
gases
are
crucial
for
numerous
applications.
Array
of
conventional
single-output
is
currently
limited
by
problems
including
drift,
large
size,
high
cost.
Here,
we
report
a
sensor
with
multiple
chemiresistive
potentiometric
outputs
discriminative
detection.
Such
applicable
wide
range
semiconducting
electrodes
solid
electrolytes,
which
allows
tailor
optimize
the
sensing
pattern
tuning
material
combination
conditions.
The
performance
boosted
equipping
mixed-conducting
perovskite
electrode
reverse
polarity.
A
conceptual
dual
sensitive
achieves
superior
three-dimensional
(sub)ppm
discrimination
humidity
seven
(2-Ethylhexanol,
ethanol,
acetone,
toluene,
ammonia,
carbon
monoxide,
nitrogen
dioxide),
enables
accurate
early
warning
fire
hazards.
Our
findings
offer
possibilities
design
simple,
compact,
inexpensive,
highly
multivariate
sensors.
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
53(5), P. 2530 - 2577
Published: Jan. 1, 2024
This
review
emphasizes
the
crucial
role
of
chemiresistive
gas
sensors
(CGS)
in
detection.
It
underscores
porous
materials
as
alternatives,
showcasing
their
exceptional
attributes.
The
explores
CGS-based
real-life
applications.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: April 8, 2024
Understanding
the
sensing
mechanism
of
metal
oxide
semiconductors
is
imperative
to
development
high-performance
sensors.
The
traditional
only
recognizes
effect
surface
chemisorbed
oxygen
from
air
but
ignores
lattice
oxygen.
Herein,
using
in-situ
characterizations,
we
provide
direct
experimental
evidence
that
participated
in
process
can
come
oxides.
Further
density
functional
theory
(DFT)
calculations
prove
p-band
center
O
serves
as
a
state
art
for
regulating
participation
gas-sensing
reactions.
Based
on
our
data
and
theoretical
calculations,
discuss
mechanisms
are
fundamentally
different
conventional
show
easily
helpful
high
response
value
materials.
Nano-Micro Letters,
Journal Year:
2025,
Volume and Issue:
17(1)
Published: Jan. 24, 2025
Abstract
The
integration
of
dual-mesoporous
structures,
the
construction
heterojunctions,
and
incorporation
highly
concentrated
oxygen
vacancies
are
pivotal
for
advancing
metal
oxide-based
gas
sensors.
Nonetheless,
achieving
an
optimal
design
that
simultaneously
combines
mesoporous
precise
heterojunction
modulation,
controlled
through
a
one-step
process
remains
challenging.
This
study
proposes
innovative
method
fabricating
zinc
stannate
semiconductors
featuring
structures
tunable
via
direct
solution
precursor
plasma
spray
technique.
As
proof
concept,
resulting
stannate-based
coatings
applied
to
detect
2-undecanone,
key
biomarker
rice
aging.
Remarkably,
oxide/zinc
heterojunctions
with
well-defined
secondary
pore
structure
exhibit
exceptional
gas-sensing
performance
2-undecanone
at
room
temperature.
Furthermore,
practical
experiments
indicate
developed
sensor
effectively
identifies
adulteration
in
various
varieties.
These
results
underscore
potential
this
designing
oxides
tailored
properties
high-performance
enhanced
adsorption
capacity
features
semiconductor
make
it
promising
candidate
sensing
applications
agricultural
food
safety
inspections.
Sensors,
Journal Year:
2025,
Volume and Issue:
25(4), P. 1102 - 1102
Published: Feb. 12, 2025
Mid-infrared
(MIR)
photonic
sensors
are
revolutionizing
optical
sensing
by
enabling
precise
chemical
and
biological
detection
through
the
interrogation
of
molecules'
unique
vibrational
modes.
This
review
explores
core
principles
MIR
photonics,
emphasizing
light-matter
interactions
within
2-20
µm
wavelength
range.
Additionally,
it
examines
innovative
sensor
architectures,
such
as
integrated
platforms
fibers,
that
enhance
sensitivity,
specificity,
device
miniaturization.
The
discussion
extends
to
groundbreaking
applications
in
environmental
monitoring,
medical
diagnostics,
industrial
processes,
security,
highlighting
transformative
impact
these
technologies.
comprehensive
overview
aims
illuminate
current
state-of-the-art
while
inspiring
future
developments
sensing.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(41)
Published: Aug. 19, 2024
Abstract
Efficient
gas
sensors
are
critical
for
environmental
monitoring
and
industrial
safety.
While
metal
oxide
semiconductor
(MOS)
cost‐effective,
they
struggle
with
poor
selectivity,
high
operating
temperatures,
limited
stability.
Electrochemical
sensors,
though
selective
energy‐efficient,
face
costs,
stability
issues
due
to
precious
catalysts
like
platinum
on
carbon
(Pt/C).
Herein,
a
novel,
cost‐effective
electrochemical
sensor
using
nitrogen‐doped
indium
In
2
O
3−
x
N
/3
V
(0.01≤
≤0.14),
synthesized
varying
nitriding
times
is
presented.
The
optimized
3
N‐40
min
demonstrates
remarkable
response
current
of
771
nA
10
ppm
nitrogen
dioxide
(NO
)
at
ambient
temperature,
outstanding
long‐term
(over
30
days)
rapid
response/recovery
(5/16
s).
Compared
Pt/C
it
shows
84%
67%
reductions
in
recovery
times,
respectively,
maintains
98%
performance
after
month,
versus
68%
Pt/C.
This
presents
promising
alternative
sensing,
eliminating
the
need
catalysts.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(7), P. 3896 - 3909
Published: Jan. 1, 2024
A
high-selectivity
reversed
response
to
H
2
is
discovered
from
the
monolithic
MOF-derived
nanocomposites
under
UV
photoexcitation
at
room-temperature,
which
provides
a
feasible
reference
for
ultra-effective
gas
discrimination
room
temperature.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(32)
Published: July 3, 2024
Abstract
A
novel
Fe
2
Mo
3
O
8
/MoO
@MoS
nanocomposite
is
synthesized
for
extremely
sensitive
detection
of
NH
in
the
breath
kidney
disease
patients
at
room
temperature.
Compared
to
MoS
,
α‐Fe
/MoS
and
MoO
it
shows
optimal
gas‐sensing
performance
by
optimizing
formation
900
°C.
The
annealed
(Fe
‐900
°C)
sensor
demonstrates
a
remarkably
high
selectivity
with
response
875%
30
ppm
an
ultralow
limit
3.7
ppb.
This
excellent
linearity,
repeatability,
long‐term
stability.
Furthermore,
effectively
differentiates
between
varying
stages
through
quantitative
measurements.
sensing
mechanism
elucidated
analysis
alterations
X‐ray
photoelectron
spectroscopy
(XPS)
signals,
which
supported
density
functional
theory
(DFT)
calculations
illustrating
adsorption
oxidation
pathways
their
effects
on
charge
transfer,
resulting
conductivity
change
as
signal.
mainly
attributed
heterojunction
among
exceptional
catalytic
activity
°C
.
research
presents
promising
new
material
optimized
detecting
exhaled
strategy
early
diagnosis
management
disease.
Sensors,
Journal Year:
2024,
Volume and Issue:
24(15), P. 4806 - 4806
Published: July 24, 2024
Artificial
olfaction,
also
known
as
an
electronic
nose,
is
a
gas
identification
device
that
replicates
the
human
olfactory
organ.
This
system
integrates
sensor
arrays
to
detect
gases,
data
acquisition
for
signal
processing,
and
analysis
precise
identification,
enabling
it
assess
gases
both
qualitatively
quantitatively
in
complex
settings.
article
provides
brief
overview
of
research
progress
nose
technology,
which
divided
into
three
main
elements,
focusing
on
gas-sensitive
materials,
applications,
methods.
Furthermore,
review
explores
traditional
MOS
materials
newer
porous
like
MOFs
sensors,
summarizing
applications
noses
across
diverse
fields
including
disease
diagnosis,
environmental
monitoring,
food
safety,
agricultural
production.
Additionally,
covers
pattern
recognition
drift
suppression
algorithms.
Ultimately,
summary
identifies
challenges
faced
by
current
systems
offers
innovative
solutions
future
advancements.
Overall,
this
endeavor
forges
solid
foundation
establishes
conceptual
framework
ongoing
field.
