ACS Sensors,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 12, 2025
Timely
and
accurate
detection
of
H2S
is
crucial
for
preventing
serious
health
issues
in
both
humans
livestock
upon
exposure.
However,
metal-oxide-based
sensors
often
suffer
from
mediocre
sensitivity,
poor
selectivity,
or
long
response/recovery
time.
Here,
an
atomic
Ru
species-driven
SnO2-based
sensor
fabricated
to
realize
highly
sensitive
selective
at
the
parts
per
billion
level
as
low
100
ppb.
The
shows
a
high
sensing
response
(Rair/Rgas
=
310.1)
ultrafast
time
(less
than
1
s)
20
ppm
operating
temperature
160
°C.
Operando
SR-FTIR
spectroscopic
characterizations
DFT
calculations
prove
that
superior
properties
can
be
mainly
attributed
driven
effect
species
on
formation
surface-adsorbed
oxygen
surface
SnO2,
which
provides
more
active
sites
enhances
performance
SnO2
H2S.
Furthermore,
lab-made
wireless
portable
monitoring
system
developed
rapidly
detect
early
warning,
suggesting
potential
application
system.
This
work
novel
approach
fabricating
gas
by
metal
loaded
metal-oxide
semiconductors.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 4, 2025
Abstract
Semiconductor‐based
hydrogen
sensors
provide
cost‐efficient
solutions
for
safety
and
a
circular
hydrogen‐based
economy.
Liquid
metal‐derived
2D
metal
oxides
show
promise
as
ultrathin
sensing
materials.
However,
conventional
exfoliation
inevitably
introduces
metallic
resides,
which
are
often
removed
post‐synthesis.
Here
the
residual
indium
nano‐islands
strategically
retained
within
annealed
In
2
O
3
layers,
creating
self‐embedded
Schottky
junctions.
This
unique
architecture
enhances
gas‐solid
coupling
at
In/In
interfaces.
Tuning
composition
spatial
distribution
of
amplifies
thermionic
electron
emission
across
barriers.
The
resulting
sensor
achieves
room‐temperature
detection
with
rapid
response
time
4.4
s,
high
3.4,
>2.5
selectivity
against
common
interferents.
Remarkably,
it
exhibits
only
6.7%
performance
deviation
after
6
weeks
shows
good
humidity
resistance.
These
merits
underscore
potential
material
method
addressing
formidable
challenge
in
developing
high‐performance
sensors.
Chemosensors,
Journal Year:
2025,
Volume and Issue:
13(5), P. 154 - 154
Published: April 22, 2025
Monitoring
trace
toluene
exposure
is
critical
for
early-stage
lung
cancer
screening
via
breath
analysis,
yet
conventional
chemiresistive
sensors
face
fundamental
limitations,
including
compromised
selectivity
in
complex
VOC
matrices
and
humidity-induced
signal
drift,
with
prevailing
p–n
heterojunction
architectures
suffering
from
inherent
charge
recombination
environmental
instability.
Herein,
we
pioneer
a
2D
core–shell
n–n
strategy
through
rational
design
of
TiO2@MoS2
heterostructures,
where
vertically
aligned
MoS2
nanosheets
are
epitaxially
grown
on
TiO2
derived
graphene-templated
synthesis,
creating
built-in
electric
fields
at
the
interface
that
dramatically
enhance
carrier
separation
efficiency.
At
240
°C,
sensor
exhibits
superior
response
(Ra/Rg
=
9.8
to
10
ppm
toluene),
outperforming
2.8).
Additionally,
demonstrates
rapid
response/recovery
kinetics
(9
s/16
s),
low
detection
limit
(50
ppb),
excellent
against
interfering
gases
moisture.
The
enhanced
performance
attributed
unidirectional
electron
transfer
(TiO2
→
MoS2)
without
hole
losses,
methyl-specific
adsorption
oxygen
vacancy
alignment,
steric
exclusion
non-target
VOCs
size-selective
interlayers.
This
work
establishes
transformative
paradigm
gas
by
leveraging
physics
synergy,
overcoming
long-standing
limitations
architectures.
ACS Sensors,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 12, 2025
Timely
and
accurate
detection
of
H2S
is
crucial
for
preventing
serious
health
issues
in
both
humans
livestock
upon
exposure.
However,
metal-oxide-based
sensors
often
suffer
from
mediocre
sensitivity,
poor
selectivity,
or
long
response/recovery
time.
Here,
an
atomic
Ru
species-driven
SnO2-based
sensor
fabricated
to
realize
highly
sensitive
selective
at
the
parts
per
billion
level
as
low
100
ppb.
The
shows
a
high
sensing
response
(Rair/Rgas
=
310.1)
ultrafast
time
(less
than
1
s)
20
ppm
operating
temperature
160
°C.
Operando
SR-FTIR
spectroscopic
characterizations
DFT
calculations
prove
that
superior
properties
can
be
mainly
attributed
driven
effect
species
on
formation
surface-adsorbed
oxygen
surface
SnO2,
which
provides
more
active
sites
enhances
performance
SnO2
H2S.
Furthermore,
lab-made
wireless
portable
monitoring
system
developed
rapidly
detect
early
warning,
suggesting
potential
application
system.
This
work
novel
approach
fabricating
gas
by
metal
loaded
metal-oxide
semiconductors.
