As
an
alternative
to
the
conventionally
used
expensive
and
highly
hydrogen
penetrable
Palladium
(Pd)-based
membrane
ionomers
poly
(vinylphosphonic
acid)
(PVPA),
Sulfonated
Poly
(ether
ether
ketone)
(SPEEK)
membranes
with
varying
ion
exchange
capacities
(IEC)
ranging
from
0.5
2.2
meq/g
are
synthesized.
Furthermore,
incorporation
of
ion-conducting
units
into
these
polymers
is
explored
using
both
random
block
copolymerization
approaches.
At
75°C,
SPEEK
exhibit
significantly
lower
diffusivity
(35-50
barriers)
compared
(Pd)
(~202
barriers).
Among
yttria-stabilized
zirconia
(YSZM),
those
produced
through
marginally
greater
proton-to-hydrogen
selectivity
than
YSZM
derived
copolymers
a
similar
capacity
(IEC).
This
could
be
ascribed
improved
hydrogen-blocking
capability
resulting
underdeveloped
hydrophilic
component.
tested,
IEC
approximately
1.9
demonstrates
superior
performance
(6.8
A/cm2)
similarly
thick
(~45
μm)
Pd
340
(4.4
at
2.2V.
However,
during
accelerated
stress
test
involving
410
successive
fluctuating
flow
densities
2.8
0.04
A/cm2
imitating
alternating
period's
cycles
water
electrolyzer,
exhibits
higher
degradation
rate
(860
μV/h)
(505
μV/h).
ECS Sensors Plus,
Journal Year:
2024,
Volume and Issue:
3(2), P. 025001 - 025001
Published: May 7, 2024
Originating
at
the
intersection
of
physics
and
biosensing,
quantum
biosensors
(QB)
are
transforming
medical
diagnostics
personalized
medicine
by
exploiting
phenomena
to
amplify
sensitivity,
specificity,
detection
speed
compared
traditional
biosensors.
Their
foundation
lies
in
fusion
biological
entities
like
DNA,
proteins,
or
enzymes
with
sensors,
which
elicits
discernible
alterations
light
emissions
when
interacting
sample
molecules.
prowess
identifying
disease-linked
biomarkers
presents
an
avenue
for
early
diagnoses
conditions
Alzheimer’s
cancer.
Beyond
this,
they
enable
real-time
monitoring
treatment
responses
capturing
dynamism
biomarkers,
but
QB
still
faces
challenges,
such
as
issues
stability,
reproducibility,
intricate
interactions.
Moreover,
seamless
integration
into
prevailing
diagnostic
frameworks
necessitates
careful
consideration.
Looking
ahead,
evolution
navigates
uncharted
territories.
Innovations
fabrication
techniques,
interdisciplinary
collaborations,
standardization
protocols
emerge
pivotal
areas
exploration.
This
comprehensive
discourse
encapsulates
QB’s
principles,
diverse
iterations,
burgeoning
utilities.
It
delves
inherent
challenges
limitations,
shedding
on
potential
trajectories
future
research.
As
continues
evolve,
its
redefine
becomes
increasingly
tangible.
The
saga
resonates
possibilities,
poised
reshape
landscape
profoundly.
Science Advances,
Journal Year:
2023,
Volume and Issue:
9(33)
Published: Aug. 18, 2023
Understanding
diffusion
in
microstructures
plays
a
crucial
role
many
scientific
fields,
including
neuroscience,
medicine,
or
energy
research.
While
magnetic
resonance
(MR)
methods
are
the
gold
standard
for
measurements,
spatial
encoding
MR
imaging
has
limitations.
Here,
we
introduce
nitrogen-vacancy
(NV)
center–based
nuclear
(NMR)
spectroscopy
as
powerful
tool
to
probe
within
microscopic
sample
volumes.
We
have
developed
an
experimental
scheme
that
combines
pulsed
gradient
spin
echo
(PGSE)
with
optically
detected
NV-NMR
spectroscopy,
allowing
local
quantification
of
molecular
and
flow.
demonstrate
correlated
optical
spatially
resolved
PGSE
experiments
probing
anisotropic
water
individual
model
microstructure.
Our
technique
opens
up
prospects
extending
current
capabilities
investigating
processes
future
potential
single
cells,
tissue
microstructures,
ion
mobility
thin
film
materials
battery
applications.
SciPost Physics,
Journal Year:
2024,
Volume and Issue:
17(1)
Published: July 4, 2024
Quantum
sensors
can
show
unprecedented
sensitivities,
provided
they
are
controlled
in
a
very
specific,
optimal
way.
Here,
we
consider
spin
sensor
of
time-varying
fields
the
presence
dephasing
noise,
and
that
problem
finding
pulsed
control
field
optimizes
sensitivity
(i.e.,
smallest
detectable
signal)
be
mapped
to
determination
ground
state
chain.
We
find
an
approximate
but
analytic
solution
this
problem,
which
provides
lower
bound
for
close
optimal,
further
use
as
initial
guess
realizing
fast
simulated
annealing
algorithm.
experimentally
demonstrate
improvement
spin-qubit
magnetometer
based
on
nitrogen-vacancy
center
diamond.
Nature Communications,
Journal Year:
2025,
Volume and Issue:
16(1)
Published: Feb. 3, 2025
Microscopy
enables
detailed
visualization
and
understanding
of
minute
structures
or
processes.
While
cameras
have
significantly
advanced
optical,
infrared,
electron
microscopy,
imaging
nuclear
magnetic
resonance
(NMR)
signals
on
a
camera
has
remained
elusive.
Here,
we
employ
nitrogen-vacancy
centers
in
diamond
as
quantum
sensor,
which
converts
NMR
into
optical
that
are
subsequently
captured
by
high-speed
camera.
Unlike
traditional
imaging,
our
method
records
the
signal
over
wide
field
view
real
space.
We
demonstrate
widefield
microscopy
can
image
microfluidic
with
~10
μm
resolution
across
~235
×
150
μm2
area.
Crucially,
each
pixel
an
spectrum
providing
multicomponent
information
about
signal's
amplitude,
phase,
local
strengths,
gradients.
The
fusion
techniques
multifaceted
applications
physical
life
sciences.
Applied Physics Letters,
Journal Year:
2023,
Volume and Issue:
123(26)
Published: Dec. 25, 2023
Nuclear
magnetic
resonance
(NMR)
and
electron
spin
(ESR)
methods
are
indispensable
techniques
that
utilize
the
of
particles
to
probe
matter,
with
applications
in
various
disciplines,
including
fundamental
physics,
chemistry,
biology,
medicine.
Despite
their
versatility,
technique's
sensitivity,
particularly
for
NMR,
is
intrinsically
low,
which
typically
limits
detection
(MR)
signals
macroscopic
sample
volumes.
In
recent
years,
atom-sized
field
quantum
sensors
based
on
nitrogen-vacancy
(NV)
centers
diamond
paved
way
detect
MR
at
micro-
nanoscale,
even
down
a
single
spin.
this
perspective,
we
offer
an
overview
most
promising
directions
evolving
technology
developing.
Significant
advancements
anticipated
life
sciences,
molecule
cell
studies,
lab-on-a-chip
analytics,
radicals
or
ions.
Similarly,
NV-MR
expected
have
substantial
impact
areas
materials
research,
such
as
surface
science,
catalysis,
2D
materials,
thin
films,
under
extreme
conditions,
technologies.
Physical Review Research,
Journal Year:
2024,
Volume and Issue:
6(4)
Published: Oct. 4, 2024
A
diamond-based
sensor
utilizing
nitrogen-vacancy
(NV)
center
ensembles
permits
the
analysis
of
micron-sized
samples
through
nuclear
magnetic
resonance
(NMR)
techniques
at
room
temperature.
Current
efforts
are
directed
towards
extending
operating
range
NV
centers
into
high
fields,
driven
by
potential
for
larger
spin
polarization
target
sample
and
presence
enhanced
chemical
shifts.
Especially
interesting
is
access
to
J-couplings
as
they
carry
information
connectivity
inside
molecules.
In
this
work,
we
present
a
protocol
in
both
homonuclear
heteronuclear
cases
with
fields.
Our
leads
clear
spectrum
exclusively
containing
J-coupling
features
resolution.
This
resolution
limited
primarily
decoherence
sample,
which
mitigated
noise-filtering
capacities
our
method.
Published
American
Physical
Society
2024
Journal of Applied Mathematics and Physics,
Journal Year:
2023,
Volume and Issue:
11(11), P. 3666 - 3675
Published: Jan. 1, 2023
This
paper
is
a
literature
review
on
the
operating
theory
of
NV
centers
and
its
applications.Extensive
material
online
had
been
reviewed
to
provide
comprehensive
explanation
in
this
review.
