ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(11), P. 9506 - 9514
Published: May 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,
Journal Year:
2022,
Volume and Issue:
10(7), P. 289 - 289
Published: July 21, 2022
There
is
an
increasing
need
for
the
development
of
low-cost
and
highly
sensitive
gas
sensors
environmental,
commercial,
industrial
applications
in
various
areas,
such
as
hazardous
monitoring,
safety,
emission
control
combustion
processes.
Considering
this,
resistive-based
using
metal
oxide
semiconductors
(MOSs)
have
gained
special
attention
owing
to
their
high
sensing
performance,
stability,
low
cost
synthesis
fabrication.
The
relatively
final
costs
these
allow
commercialization;
consequently,
they
are
widely
used
available
at
prices.
This
review
focuses
on
important
MOSs
with
different
morphologies,
including
quantum
dots,
nanowires,
nanofibers,
nanotubes,
hierarchical
nanostructures,
other
structures
fabrication
resistive
sensors.
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.
Advanced Materials Technologies,
Journal Year:
2023,
Volume and Issue:
8(8)
Published: Jan. 29, 2023
Abstract
Traditional
metal
oxide
semiconductor
gas
sensors
are
facing
significant
challenges
for
portable
devices
and
integration
due
to
large
power
consumption
caused
by
high
working
temperature.
2D
nanomaterials
with
specific
surface
areas,
rich
active
sites,
tunable
electrical
properties
proved
be
promising
candidates
room‐temperature
sensors.
However,
several
disadvantages
including
weak
response,
sluggish
response/recovery
kinetics,
poor
selectivity
still
need
overcome
high‐performance
Herein,
SnO
2
quantum
dots
(QDs)
a
diameter
of
≈3
nm
functionalized
SnS
nanosheets
thickness
≈17
synthesized
via
two‐step
solvothermal
method,
which
exhibits
response
11.1
100
ppm
NH
3
at
room
temperature
25
°C
fast
speed
good
repeatability,
selectivity,
long‐term
stability.
The
sensing
mechanism
is
mainly
ascribed
0D/2D
heterostructure,
synergistic
effect,
n‐n
heterojunction
constructed
across
the
interfaces
between
QDs
nanosheets.
as‐prepared
may
contribute
reasonable
design
heterostructure
0D
nanomaterials,
offer
candidate
detection.
Nanomaterials,
Journal Year:
2023,
Volume and Issue:
13(8), P. 1424 - 1424
Published: April 20, 2023
The
search
for
sustainable
technology-driven
advancements
in
material
synthesis
is
a
new
norm,
which
ensures
low
impact
on
the
environment,
production
cost,
and
workers’
health.
In
this
context,
non-toxic,
non-hazardous,
low-cost
materials
their
methods
are
integrated
to
compete
with
existing
physical
chemical
methods.
From
perspective,
titanium
oxide
(TiO2)
one
of
fascinating
because
its
non-toxicity,
biocompatibility,
potential
growing
by
Accordingly,
TiO2
extensively
used
gas-sensing
devices.
Yet,
many
nanostructures
still
synthesized
lack
mindfulness
environmental
methods,
results
serious
burden
practical
commercialization.
This
review
provides
general
outline
advantages
disadvantages
conventional
preparation.
Additionally,
detailed
discussion
growth
green
included.
Furthermore,
applications
approaches
improve
key
functionality
sensors,
including
response
time,
recovery
repeatability,
stability,
discussed
detail
latter
parts
review.
At
end,
concluding
included
provide
guidelines
selection
techniques
properties
TiO2.
ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(9), P. 7323 - 7329
Published: May 4, 2023
Two-dimensional
(2D)
semiconducting
heterojunction
chemical
sensors
are
in
high
demand
because
of
their
enhanced
response,
stability,
and
selectivity.
However,
fine-tuning
heterojunctions
using
vapor
deposition
growth
still
needs
further
research.
Our
present
study
focuses
on
the
ambient
pressure
(CVD)
synthesis
hexagonal
tungsten
sulfide-tungsten
selenide
(WS2–WSe2)
p–p
(as
a
2D–2D
arrangement).
We
use
liquid-phase
exfoliation
method
to
disperse
bulk
WS2
WSe2
decorate
large
flakes
with
smaller
nanosheets
CVD.
Electron
microscopy
related
surface
investigations
reveal
homogeneity
drop-casting.
Two
drops
from
exfoliated
dispersion
were
drop-cast
transducer
NO2
response
sensing
properties.
The
sensor
showed
long-term
stability
(>2
months),
even
at
humidity
levels
(40–90%).
gas-sensing
properties
this
layered
heterojunction-based
nanocomposite
strongly
suggest
an
affinity
toward
gas,
leading
improved
independent
effects,
