ACS Applied Nano Materials,
Год журнала:
2023,
Номер
6(11), С. 9506 - 9514
Опубликована: Май 19, 2023
A
highly
sensitive
array
of
two-dimensional
(2D)
WSe2
nanosheets
integrated
with
zero-dimensional
(0D)
SnS
quantum
dots
was
synthesized
by
combining
liquid-phase
exfoliation
and
wet
chemical
synthesis
methods.
The
characterization
results
scanning
electron
microscopy
(SEM),
transmission
(TEM),
X-ray
diffraction
(XRD)
revealed
the
formation
WSe2/SnS
heterostructures,
which
enable
a
cyclic
reproducible
high
gas
sensing
response.
role
allocation
on
verified
using
density
functional
theory
(DFT)
calculations.
result
indicates
that
top
alignment
bottom
layer
act
as
adsorption
carrier
conduction
layer,
respectively.
charge
interactions
heterostructures
were
systematically
explored
monitoring
changes
in
transferred
characteristics
at
room
temperature
(27
°C)
after
introducing
25–100
ppb
NO2.
highest
response
toward
NO2
found
to
be
1.08
25
LOD
10.6
ppb.
experimental
simulation
transfer
across
active
sites
increased
incorporating
WSe2.
showed
an
abrupt
reliable
under
periodic
injection
unambiguously
achieved
such
heterostructures.
sensor
also
exhibited
satisfactory
stability
accuracy
selectivity
is
not
affected
humidity
temperature.
DFT
calculations
used
explain
mechanism
heterojunction
for
nanocomposites.
Chemosensors,
Год журнала:
2024,
Номер
12(3), С. 42 - 42
Опубликована: Март 5, 2024
This
paper
aims
to
provide
a
large
coverage
of
recent
developments
regarding
environmental
monitoring
using
metal
oxide-based
sensors.
Particular
attention
is
given
the
detection
gases
such
as
H2,
COx,
SOx,
NOx,
and
CH4.
The
analyses
design
sensors
types
oxide
sensing
materials
are
emphasized.
mechanisms
peculiarities
oxides
used
in
chemoresistive
provided.
main
parameters
that
affect
sensitivity
selectivity
indicated
their
significance
sensor
signal
analyzed.
Modern
data
processing
algorithms,
employed
optimize
measurement
process
signal,
considered.
existing
arrays/e-nose
systems
for
summarized,
future
prospects
challenges
encountered
with
arrays
highlighted.
Frontiers in Chemistry,
Год журнала:
2025,
Номер
13
Опубликована: Апрель 4, 2025
While
achieving
remarkable
commercial
success,
lithium-ion
battery
(LIBs)
carry
substantial
safety
risks
associated
with
potential
thermal
runaway
during
widespread
applications.
When
operated
under
complex
working
conditions,
particularly
in
high-temperature
and
high-pressure
environments,
the
internal
galvanic
reactions
within
these
batteries
may
escalate
uncontrollably.
During
early
stages
of
LIBs
runaway,
amounts
characteristic
gases
such
as
H
2
,
CO,
CO
are
released.
Safety
assess
ent
current
status
can
be
achieved
through
detecting
indicative
gas
concentrations,
thereby
enabling
efficient
safe
utilization
LIBs.
This
study
provides
a
mini
review
research
on
semiconductor
sensors
for
two
key
dimensions.
Firstly,
mechanisms
governing
entire
process
elucidated,
explicit
analysis
generation
patterns
detectable
speciation.
Subsequently,
categorically
examines
progress
targeting
four
critical
categories:
carbon
oxides,
hydrogen,
hydrocarbons,
volatile
electrolytes.
work
establishes
theoretical
framework
technical
reference
researchers
related
fields
to
advance
sensor
development,
while
also
providing
actionable
recommendations
facilitate
fabrication
high-performance
sensing
devices.
Sensors and Actuators B Chemical,
Год журнала:
2024,
Номер
406, С. 135379 - 135379
Опубликована: Янв. 24, 2024
Layered
transition
metal
dichalcogenides
(TMDCs)
are
considered
among
the
next-generation
materials
for
gas
sensing.
Here,
we
report
exfoliated
2H-WS2
nanosheets
fabrication
of
highly
performing
NO2
sensors.
Thermal
annealing
at
several
temperatures
was
performed
to
investigate
oxidation
WS2.
The
long-term
stability
bulk
verified.
Using
droplet
variation
method,
three
batches
conductometric
sensors
from
dispersions
were
fabricated
on
electrical
transducers,
namely
two
layers
(2
L),
five
(5
L)
and
ten
(10
WS2
nanosheets.
These
tested
towards
low
concentrations
different
(Room
Temperature
(20
℃),
50
℃
100
℃)
relative
humidity
(RH)
levels
(20%,
40%,
60%,
80%
90%
RH).
2L-WS2
based
sensor
showed
highest
response
room
temperature
(RT).
Excellent
repeatability
(4
cycles)
1
ppm
(more
than
months)
achieved.
Full
selectivity
(1
ppm)
RT
observed
over
NH3
(15
ppm),
H2S
ethanol
(30
acetone
ppm).
Our
results
confirm
that
low-power
consumption
devices
with
high
sensitivity
(even
RH),
excellent
using
