ACS Sensors,
Год журнала:
2024,
Номер
9(5), С. 2520 - 2528
Опубликована: Май 9, 2024
Alternative
energy
sources
are
required
due
to
the
decline
in
fossil
fuel
resources.
Therefore,
devices
that
utilize
hydrovoltaic
technology
and
light
have
drawn
widespread
attention
because
they
emission-free
solar
is
inexhaustible.
However,
previous
investigations
mainly
focused
on
accelerating
water
evaporation
rate
at
electrode
interface.
Here,
a
cooperative
photoelectrochemical
effect
chip
achieved
using
NH2-MIL-125-modified
TiO2
nanotube
arrays
(NTs).
This
device
demonstrated
significantly
improved
evaporation-triggered
electricity
generation.
Under
LED
illumination,
open-circuit
voltage
(VOC)
of
NH2-MIL-125/TiO2NTs
active
layer
was
enhanced
by
90.3%
(up
400.2
mV).
Furthermore,
prepared
showed
good
high-salinity
tolerance,
maintaining
74.6%
its
performance
even
5
M
NaCl.
By
introducing
Schiff-based
reaction
between
formaldehyde,
fully
integrated
flexible
sensor
successfully
fabricated
for
formaldehyde
monitoring,
low
limit
detection
5.2
×
10–9
achieved.
novel
strategy
improving
offers
completely
new
general
approach
construct
self-powered
point-of-care
sensing.
Journal of the American Ceramic Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 21, 2025
Abstract
The
increasing
demand
for
manufacturing,
processing,
and
utilizing
ceramic
materials
necessitates
a
deeper
understanding
of
their
mechanical
properties,
particularly
plasticity.
In
this
study,
the
nanoindentation
responses
rutile
titanium
dioxide
(TiO
2
)
were
investigated
using
bicrystal
samples.
Two
types
TiO
bicrystals
with
symmetric
10°
tilt
grain
boundaries
fabricated
by
diffusion
bonding:
one
(001)
boundary
around
[110]
rotation
axis,
other
(010)
[001]
axis.
High‐resolution
transmission
electron
microscopy
observations
showed
that
both
contained
low‐angle
composed
periodic
dislocations.
Nanoindentation
experiments
conducted
in
single‐crystal
regions
to
characterize
properties
,
as
well
near
evaluate
its
influence
on
hardness.
results
from
plane
exhibited
significantly
higher
hardness
elastic
modulus
than
{110}
(100)
planes,
indicating
anisotropic
behavior
.
planes
are
two
equivalent
crystallographic
but
differs
them.
Scanning
probe
revealed
clear
slip
traces
indents
without
accompanying
cracks,
at
5
mN
achieved
dislocation‐mediated
plasticity
room
temperature.
For
nanoindentations
plastic
deformation
was
governed
{101}<10>
system,
while
(100)[010]
system
dominated
plane.
pronounced
peak
boundary,
whereas
minor
hardening
effect
observed
boundary.
These
findings
provide
new
insights
into
room‐temperature
plasticity,
anisotropy,
effects
crystals.
Micromachines,
Год журнала:
2025,
Номер
16(5), С. 493 - 493
Опубликована: Апрель 23, 2025
Gas
sensors,
widely
used
in
various
fields,
are
devices
to
detect
the
presence
of
a
specific
gas
within
certain
area
or
continuously
measure
concentration
components
[...]
Nanomaterials,
Год журнала:
2025,
Номер
15(9), С. 691 - 691
Опубликована: Май 3, 2025
Developing
novel
gas-sensing
materials
is
critical
for
overcoming
the
limitations
of
current
metal
oxide
semiconductor
technologies,
which,
despite
their
widely
commercial
use,
require
high
operating
temperatures
to
achieve
optimal
performance.
In
this
context,
integrating
graphene
with
molecular
organic
layers
provides
a
promising
platform
next-generation
materials.
work,
we
systematically
explore
properties
phthalocyanine/graphene
(MPc/Gr)
interfaces
using
density
functional
theory
calculations.
Specifically,
examine
role
different
MPcs
(FePc,
CoPc,
NiPc,
and
CuPc)
Gr
doping
levels
(p-doped,
neutral,
n-doped)
in
detection
NH3
NO2
molecules,
used
as
representative
electron-donor
-acceptor
testing
gases,
respectively.
Our
results
reveal
that
p-doped
necessary
detection,
while
choice
cation
plays
crucial
determining
sensitivity,
following
trend
FePc/Gr
>
CoPc/Gr
NiPc/Gr,
CuPc/Gr
exhibiting
no
response.
Remarkably,
demonstrates
sensitivity
down
limit
single
molecule
per
FePc.
Conversely,
possible
under
both
neutral
n-doped
Gr,
strongest
response
observed
CoPc/Gr.
Crucially,
identify
dz2
orbital
MPc
key
factor
mediating
charge
transfer
between
gas
governing
electronic
interactions
drive
sensing
These
insights
provide
valuable
guidelines
rational
design
high-sensitivity
graphene-based
sensors.
ACS Sensors,
Год журнала:
2024,
Номер
9(5), С. 2520 - 2528
Опубликована: Май 9, 2024
Alternative
energy
sources
are
required
due
to
the
decline
in
fossil
fuel
resources.
Therefore,
devices
that
utilize
hydrovoltaic
technology
and
light
have
drawn
widespread
attention
because
they
emission-free
solar
is
inexhaustible.
However,
previous
investigations
mainly
focused
on
accelerating
water
evaporation
rate
at
electrode
interface.
Here,
a
cooperative
photoelectrochemical
effect
chip
achieved
using
NH2-MIL-125-modified
TiO2
nanotube
arrays
(NTs).
This
device
demonstrated
significantly
improved
evaporation-triggered
electricity
generation.
Under
LED
illumination,
open-circuit
voltage
(VOC)
of
NH2-MIL-125/TiO2NTs
active
layer
was
enhanced
by
90.3%
(up
400.2
mV).
Furthermore,
prepared
showed
good
high-salinity
tolerance,
maintaining
74.6%
its
performance
even
5
M
NaCl.
By
introducing
Schiff-based
reaction
between
formaldehyde,
fully
integrated
flexible
sensor
successfully
fabricated
for
formaldehyde
monitoring,
low
limit
detection
5.2
×
10–9
achieved.
novel
strategy
improving
offers
completely
new
general
approach
construct
self-powered
point-of-care
sensing.
