ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 29, 2025
This
work
introduces
a
magnetic
conductive
atomic
force
microscopy
(mc-AFM)
measurement
platform
for
determining
spin
polarizations,
arising
from
the
chiral-induced
selectivity
(CISS)
effect
along
different
directions
in
helical
conducting
fibers.
By
using
principle
that
preference
electron
transport
chiral
material
changes
with
momentum
of
electron,
this
method
quantifies
polarization
materials,
which
straddle
ferromagnetic
electrode,
i.e.,
by
taking
measurements
regions
to
right
and
left
electrode
while
it
is
magnetized
in-plane.
The
working
mechanism
shown
polyaniline
(PANI)
fibers,
they
reveal
longitudinal,
fiber's
axis,
transverse,
perpendicular
fiber
magnetoresistance
differ
about
factor
2.
observations
imply
PANI
fibers
not
consistent
models
attribute
(or
magnetoresistance)
solely
spinterface
or
spin-dependent
charge
injection
barriers.
In
aggregate,
new
offers
simplified
approach
extending
mc-AFM
resolving
spin-filtered
currents
oriented
samples.
Small Methods,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 22, 2025
Abstract
The
oxygen
reduction
reaction
(ORR)
is
a
crucial
process
in
electrochemical
energy
technologies,
featuring
fuel
cells
and
metal‐air
batteries
the
coming
carbon‐neutral
society.
Carbon
materials
have
garnered
significant
attention
as
economical,
sustainable
alternatives
to
precious
metal
catalysts.
In
particular,
there
been
increasing
reports
recently
that
pentagons
introduced
into
graphitic
carbons
promote
catalytic
activity
for
ORR.
addition,
interesting
studies
are
reported
on
carbon
materials’
synthesis,
characterization,
spin
polarization
properties
with
pentagonal
defects.
This
review
comprehensively
summarizes
formation
mechanism,
spin,
(O
2
)
adsorption,
ORR
of
catalysts
By
connecting
dots
between
theoretical
insights
experimental
results,
this
elucidates
fundamental
principles
governing
pentagon‐related
offers
perspectives
future
directions
designing
efficient
based
materials.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 29, 2025
This
work
introduces
a
magnetic
conductive
atomic
force
microscopy
(mc-AFM)
measurement
platform
for
determining
spin
polarizations,
arising
from
the
chiral-induced
selectivity
(CISS)
effect
along
different
directions
in
helical
conducting
fibers.
By
using
principle
that
preference
electron
transport
chiral
material
changes
with
momentum
of
electron,
this
method
quantifies
polarization
materials,
which
straddle
ferromagnetic
electrode,
i.e.,
by
taking
measurements
regions
to
right
and
left
electrode
while
it
is
magnetized
in-plane.
The
working
mechanism
shown
polyaniline
(PANI)
fibers,
they
reveal
longitudinal,
fiber's
axis,
transverse,
perpendicular
fiber
magnetoresistance
differ
about
factor
2.
observations
imply
PANI
fibers
not
consistent
models
attribute
(or
magnetoresistance)
solely
spinterface
or
spin-dependent
charge
injection
barriers.
In
aggregate,
new
offers
simplified
approach
extending
mc-AFM
resolving
spin-filtered
currents
oriented
samples.
