Nano Express,
Год журнала:
2024,
Номер
5(4), С. 045017 - 045017
Опубликована: Дек. 1, 2024
Abstract
We
investigate
the
field
emission
properties
of
tetrapod-shaped
zinc
oxide
(ZnO)
micro
and
nanostructures
prepared
using
a
flame
transport
synthesis
approach.
Using
piezo-driven
metallic
tip
as
an
anode,
we
performed
local
characterization
from
apex
tetrapod
arm,
where
effective
emitting
area
was
limited
below
1
μm
2
.
This
configuration
allows
extremely
low
turn-on
voltages,
7
V,
enhancement
factor
70
at
anode-cathode
distance
600
nm.
The
experimental
data
were
analyzed
Fowler–Nordheim
model,
evidencing
non-monotonous
dependence
on
cathode-anode
separation
in
range
100–900
ZnO
tetrapods
demonstrated
good
current
stability,
highlighting
their
potential
for
high-performance,
low-consumption
electron-emitting
devices
with
very
voltage.
Catalysts,
Год журнала:
2025,
Номер
15(2), С. 100 - 100
Опубликована: Янв. 22, 2025
Zinc
oxide
(ZnO)
photocatalysts
have
emerged
as
a
promising
material
for
environmental
and
energy
applications
due
to
their
exceptional
photocatalytic
properties.
Initially
recognized
efficiency
under
ultraviolet
(UV)
light,
recent
advancements
focused
on
enhancing
ZnO’s
visible
light
activity
(VLA)
address
its
inherent
limitations.
This
review
provides
an
overview
of
structure,
electronic
properties,
mechanisms.
Various
strategies
modifying
ZnO
harness
including
metal
non-metal
doping,
dye
sensitization,
semiconductor
coupling,
are
discussed.
Special
emphasis
is
placed
the
mechanisms
behind
absorption
reactive
oxygen
species
(ROS)
generation,
deduced
through
physicochemical
photoelectrochemical
analyses.
The
in
remediation
comprehensively
explored,
particularly
water
treatment,
disinfection,
air
purification.
degradation
pollutants,
persistent
organic
compounds,
pharmaceuticals,
dyes,
pesticides,
using
reviewed
compared
with
conventional
UV-activated
materials.
underscores
potential
efficient
sustainable
solution
International Journal of Nanomedicine,
Год журнала:
2024,
Номер
Volume 19, С. 12889 - 12937
Опубликована: Дек. 1, 2024
Abstract:
Over
the
last
decade,
biomedical
nanomaterials
have
garnered
significant
attention
due
to
their
remarkable
biological
properties
and
diverse
applications
in
biomedicine.
Metal
oxide
nanoparticles
(NPs)
are
particularly
notable
for
wide
range
of
medicinal
uses,
including
antibacterial,
anticancer,
biosensing,
cell
imaging,
drug/gene
delivery.
Among
these,
zinc
(ZnO)
NPs
stand
out
versatility
effectiveness.
Recently,
ZnO
become
a
primary
material
various
sectors,
such
as
pharmaceutical,
cosmetic,
antimicrobials,
construction,
textile,
automotive
industries.
can
generate
reactive
oxygen
species
induce
cellular
apoptosis,
thus
underpinning
potent
anticancer
antibacterial
properties.
To
meet
growing
demand,
numerous
synthetic
approaches
been
developed
produce
NPs.
However,
traditional
manufacturing
processes
often
involve
economic
environmental
costs,
prompting
search
more
sustainable
alternatives.
Intriguingly,
synthesis
methods
utilizing
plants,
plant
extracts,
or
microorganisms
emerged
ideal
producing
These
green
production
techniques
offer
medicinal,
economic,
environmental,
health
benefits.
This
review
highlights
latest
advancements
applications,
showcasing
potential
revolutionize
field
with
eco-friendly
cost-effective
solutions.
Keywords:
antimicrobial,
antioxidant,
synthesis,
nanomedicine,
nanoparticle,
ECS Journal of Solid State Science and Technology,
Год журнала:
2025,
Номер
14(3), С. 031004 - 031004
Опубликована: Фев. 24, 2025
This
study
focuses
on
the
synthesis,
characterization,
and
application
of
a
novel
polyvinyl
chloride
(PVC)/carbon
nanotube
(CNT)/zinc
oxide
(ZnO)
hybrid
nanocomposite.
ZnO
nanostructures
with
two
distinct
morphologies
(nanohexagons
nanorods)
were
synthesized
embedded
within
PVC
matrix
alongside
CNTs
to
achieve
functional
composite.
TEM
analysis
revealed
presence
both
nanohexagon
nanorod
structures
CNTs.
SEM
EDX
analyses
confirmed
uniform
distribution
matrix.
FTIR
UV–vis
successful
integration
ZnO,
exhibiting
well-defined
high
aspect
ratio.
The
optical
properties
are
characterized
by
reduction
in
bandgap
from
5.40
eV
for
PVC/ZnO
4.60
PVC/ZnO/5%CNT,
indicating
an
increase
absorption
visible
spectrum.
Furthermore,
AC
conductivity
demonstrates
significant
frequency
dependence,
increasing
CNT
concentration
due
formation
conductive
pathways.
dielectric
constant
also
shows
enhanced
values
increased
content,
attributed
improved
interfacial
polarization.
simulation
electric
field
reveals
that
PVC/CNT/ZnO
nanocomposite
exhibits
more
than
conventional
PVC.
concludes
has
potential
applications
optoelectronics
devices.
Journal of Applied Physics,
Год журнала:
2025,
Номер
137(12)
Опубликована: Март 24, 2025
In
recent
years,
ZnO
quantum
dots
(QDs)
synthesized
via
solution-based
methods
have
garnered
significant
attention
due
to
their
rich
surface
defects,
which
lead
strong
yellow-green
light
emissions.
However,
these
defect
emissions
often
limit
optoelectronic
performance.
Surface
engineering
of
QDs
offers
a
promising
strategy
enhance
properties
and
enable
the
construction
core–shell
heterostructures.
Among
various
approaches,
ion
exchange
sulfurization
is
an
effective
method
transform
into
ZnS,
driven
by
higher
solubility
constant
ZnO.
this
study,
we
explore
transformation
ZnO/ZnS
through
interfacial
reaction
using
thioacetamide.
Transmission
electron
microscopy
x-ray
diffraction
analyses
confirm
successful
formation
QDs.
Ultraviolet–Visible
(UV–Vis)
absorption
spectra
reveal
change:
characteristic
Urbach
tail
disappears
in
QDs,
replaced
step-like
edge
at
energy.
Fluorescence
spectroscopy
further
highlights
impact
structural
modification,
showing
that
intrinsic
emission
enhanced,
while
quenched.
Additionally,
blue
appears
around
450
nm,
indicative
higher-energy
radiative
transitions
These
findings
demonstrate
effectively
alters
optical
facilitating
with
improved
characteristics.
This
study
underscores
potential
as
powerful
tool
for
tuning
semiconductor
nanomaterials,
implications
applications
optoelectronics
photocatalysis.
