Sensors International,
Journal Year:
2022,
Volume and Issue:
3, P. 100182 - 100182
Published: Jan. 1, 2022
Zinc
oxide
(ZnO)
is
a
one-of-a-kind
material
with
semiconducting,
piezoelectric,
&
pyroelectric
properties.
Before
the
arrival
of
nanotechnology
field,
zinc
was
used
in
bulk,
but
later
it
also
employed
as
nanosized
for
its
intended
purposes.
ZnO
nano-scale
materials
currently
among
most
significant
semiconductor
oxides.
Nanotechnology
broad
field
study
that
has
emerged
cutting-edge
advanced
manufacturing
technology
worldwide.
Nanomaterials
have
diameters
less
than
100
nm.
So,
many
are
various
applications;
one
common
materials,
i.e.,
oxides,
unique
their
physiochemical
properties,
so
they
can
be
called
multi-functional
nanomaterial.
been
nanomaterial
based
on
different
morphologies
such
as–nano-particles/rods/wires/flakes/flower/sheets
etc.
plays
an
essential
role
all
every
from
non-electric
to
electronic
diagnosis
therapeutics,
textiles
agriculture.
The
first
section
this
evaluation
includes
introduction,
brief
history,
and
benefits.
following
review
describes
fabrication
methods
-
indirect,
direct,
hydrothermal,
sol-gel,
chemical
precipitation,
green
synthesis
methods.
Finally,
article
presented
prospective
implementations
fields
industry.
This
provides
valuable
information
specialize
ZnO,
covering
research
undertaken
early
1990s
until
new
use
oxides
2022.
Advanced Energy Materials,
Journal Year:
2019,
Volume and Issue:
10(11)
Published: Dec. 10, 2019
Abstract
Layered
metal
hydroxides
(LMHs)
are
regarded
as
a
novel
and
important
class
of
inorganic
functional
materials.
They
have
unique
layered
structure
variable
chemical
compositions
that
can
be
readily
tuned.
In
this
review,
summarized
the
recent
advances
synthetic
routes
to
LMHs
with
designed
morphology,
composition,
function
for
electrocatalysis.
Versatile
products
derived
by
hybridization,
anion‐exchange,
surface
modification,
self‐assembly,
etc.
More
importantly,
artificially
exfoliated
into
unilamellar
nanosheets
molecular‐level
thickness
about
1
nm
versus
2D
lateral
size
in
submicrometer
or
micrometer
scale.
Molecular‐scale
assembly
then
applied
fabricate
superlattice‐like
composites
nanofilms
high
quality.
The
transformed
oxides,
nitrides,
other
compounds
via
different
preparation
procedures,
which
further
extend
their
application
prospects.
regard,
most
promising
electrocatalysis‐related
applications
derivatives
reviewed,
such
oxygen
evolution
reaction,
reduction
hydrogen
CO
2
alcohol
urea
electrooxidation,
At
last,
future
challenges
also
discussed
from
aspect
synthesis
application,
well
encouraging
advancements
anticipated.
Nanomaterials,
Journal Year:
2020,
Volume and Issue:
10(7), P. 1392 - 1392
Published: July 17, 2020
This
article
discusses
the
main
uses
of
1D
and
2D
nanomaterials
in
development
conductometric
gas
sensors
based
on
metal
oxides.
It
is
shown
that,
along
with
advantages
these
materials,
which
can
improve
parameters
sensors,
there
are
a
number
disadvantages
that
significantly
limit
their
use
devices
designed
for
sensor
market.
Structural
symmetry
breaking
in
two-dimensional
materials
can
lead
to
superior
physical
properties
and
introduce
an
additional
degree
of
piezoelectricity.
In
the
present
paper,
we
propose
three
structural
phases
($1H,
1T$,
$1{T}^{\ensuremath{'}}$)
Janus
$\mathrm{W}X\mathrm{O}$
($X=\mathrm{S}$,
Se,
Te)
monolayers
investigate
their
vibrational,
thermal,
elastic,
piezoelectric,
electronic
by
using
first-principles
methods.
Phonon
spectra
analysis
reveals
that
while
$1H$
phase
is
dynamically
stable,
$1T$
exhibits
imaginary
frequencies
transforms
distorted
$1{T}^{\ensuremath{'}}$
phase.
Ab
initio
molecular
dynamics
simulations
confirm
$1H$-
$1{T}^{\ensuremath{'}}\text{\ensuremath{-}}\mathrm{W}X\mathrm{O}$
are
thermally
stable
even
at
high
temperatures
without
any
significant
deformations.
Different
from
binary
systems,
Raman
active
modes
appear
upon
formation
monolayers.
Although
mechanical
$1H\text{\ensuremath{-}}\mathrm{W}X\mathrm{O}$
found
be
isotropic,
they
orientation
dependent
for
$1{T}^{\ensuremath{'}}\text{\ensuremath{-}}\mathrm{W}X\mathrm{O}$.
It
also
shown
indirect
band-gap
semiconductors
band
gap
narrows
down
chalcogen
group.
Except
$1{T}^{\ensuremath{'}}$-WSO,
have
a
narrow
correlated
with
Peierls
distortion.
The
effect
spin-orbit
coupling
on
structure
examined
both
alteration
estimated.
versatile
together
large
piezoelectric
response
imply
these
systems
interesting
several
nanoelectronic
applications.
IEEE Transactions on Electron Devices,
Journal Year:
2019,
Volume and Issue:
66(8), P. 3254 - 3264
Published: July 12, 2019
The
growth
of
industries
and
other
human
activities
have
led
to
ever
increasing
amounts
pollutants
in
both
outdoor
indoor
spaces.
These
hazardous
effects
on
humans
the
wider
ecology.
Hence,
air
quality
monitoring
(AQM)
is
essential
involves
robust
various
toxic
gases
volatile
organic
compounds
(VOCs)-in
case,
concentration
any
pollutant
exceeds
safe
limit
a
given
location.
This
paper
describes
different
sources
pollutants,
reviews
current
status
gas
sensors,
discusses
role
new
two
dimensional
(2-D)
materials
detecting
these
at
low
power,
i.e.,
close
ambient
temperature.
Here,
we
review
synthesis
techniques
2-D
discuss
sensing
performances
pristine
functionalized
nanomaterials
for
some
important
such
as
NOx,
NH3,
SOx,
CO,
formaldehyde,
toluene,
so
on.
concludes
with
proposed
methods
help
reducing
pollution
today.
ACS Applied Nano Materials,
Journal Year:
2019,
Volume and Issue:
2(7), P. 4026 - 4042
Published: June 26, 2019
Over
the
past
few
years,
there
has
been
a
huge
demand
for
developing
sensors
capable
of
monitoring
and
quantifying
volatiles
related
to
food
quality
analysis,
medical
diagnosis,
environmental
monitoring.
Sensors
designed
such
applications
are
required
present
simultaneously
high
selectivity,
low
power
consumption,
fast
response/recovery
rate,
humidity
dependence,
detection
limit,
which
pose
great
challenges
be
overcome
in
development
suitable
transducer
nanomaterials
gas
sensing.
The
nanostructure
dimensionality
certainly
plays
key
role
efficient
detection.
Thanks
advantages
derived
from
nanoscaled
size
large
surface-to-volume
ratio,
electrospun
ceramic
nanofibers
(ECNs)
have
demonstrated
potential
design
gas-sensing
devices
during
most
recent
years.
Recently,
studies
shown
that
sensitivity,
other
important
sensing
parameters
can
improved
by
designing
heterojunctions
at
nanoscale.
As
consequence,
outstanding
composite
hybrid
materials
with
unprecedented
features
recently
reported
hazardous
gases.
In
view
importance
impact
these
results,
here
we
review
latest
findings
progress
literature
on
factors
influence
characteristics,
as
well
their
application
various
volatiles.
This
will
help
researchers
engineers
understand
evolution
ceramic-based
also
further
stimulate
interest
new
devices.
