Chemical Functionalization Meets Enhanced Electrical Conductivity in Iron Oxide Nanoparticles
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 31, 2025
Abstract
An
excellent
combination
of
either
oxides
or
metallic
nanoparticles
(NPs)
and
functional
π‐electron
rich
conjugated
molecules
can
originate
a
variety
intriguing
phenomena
convenient
for
technological
applications.
Functional
π‐conjugated
aromatic
hold
the
potential
to
control
size,
shape,
morphology,
optoelectronic
properties
through
formation
covalent
interfaces.
Interfacial
charge
transfer
at
nanoparticles−molecules
interfaces
plays
vital
roles
in
modulating
photophysical
electrical
conductivity
properties,
which
found
enormous
applications
catalysis,
electrical,
magnetism.
This
work
illustrates
iron
oxide
(Fe
3
O
4
NPs)
capped
with
situ
generated
aryl
radicals
tuning
properties.
Organic
different
groups
are
covalently
attached
surface
Fe
NPs
radical
formation.
insulating
pristine
turns
into
semiconductor
behavior
upon
functionalization,
is
due
synergistic
efficient
intermolecular
between
mixed
valence
metal
ions
2+
,
d
6
electronic
system,
3+
5
system)
(donor–acceptor
interactions).
A
theoretical
framework
strongly
supports
experimental
findings.
These
findings
on
using
small
molecule
provide
promising
avenue
wide
range
Язык: Английский
Lateral nanoarchitectonics from nano to life: Ongoing challenge in interfacial chemical science
Chemical Science,
Год журнала:
2024,
Номер
15(45), С. 18715 - 18750
Опубликована: Янв. 1, 2024
The
construction
of
functional
structures
within
a
single
plane
still
has
lot
challenges.
This
review
article
will
help
us
find
new
groundbreaking
directions
in
lateral
nanoarchitectonics
toward
advanced
material
organization.
Язык: Английский
Electrosynthesis of Ru (II)‐Polypyridyl Oligomeric Films on ITO Electrode for Two Terminal Non‐Volatile Memory Devices and Neuromorphic Computing
Small Methods,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 23, 2025
Abstract
Molecular
electronics
exhibiting
resistive‐switching
memory
features
hold
great
promise
for
the
next
generation
of
digital
technology.
In
this
work,
electrosynthesis
ruthenium
polypyridyl
nanoscale
oligomeric
films
is
demonstrated
on
an
indium
tin
oxide
(ITO)
electrode
followed
by
ITO
top
contact
deposition
yielding
large‐scale
(junction
area
=
0.7
×
cm
2
)
two
terminal
molecular
junctions.
The
junctions
exhibit
non‐volatile
resistive
switching
at
a
relatively
lower
operational
voltage,
±1
V,
high
ON/OFF
electrical
current
ratio
(≈10
3
),
low‐energy
consumption
(SET/RESET
27.94/14400
nJ),
good
cyclic
stability
(>300
cycles),
and
speed
25
ms/20
ms).
A
computational
study
suggests
that
accessible
frontier
orbitals
metal‐complex
to
Fermi
level
electrodes
facilitate
charge
transport
bias
filamentformation.
An
extensive
analysis
performed
performance
binary
neural
networks
exploiting
current‐voltage
devices
as
synaptic
weights
exploring
their
potential
neuromorphic
logic‐in‐memory
implementation
IMPLICATION
(IMPLY)
operation
which
can
realize
universal
gates.
comprehensive
indicates
proposed
redox‐active
complex‐based
device
may
be
promising
candidate
high‐density
data
storage,
energy‐efficient
with
software‐level
accuracy,
implementations.
Язык: Английский
Electrochemically grafted molecular layers as on-chip energy storage molecular junctions
Chemical Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Electrochemically
grown
heteroatoms
containing
organic
films
utilized
to
fabricate
crossbar
molecular
junctions
as
classical
capacitors
for
energy
storage
applications.
Язык: Английский
Altered electrochemistry of poly(3,4-ethylenedioxythiophene) after activation of the inserted cobalt ions
Journal of Electroanalytical Chemistry,
Год журнала:
2024,
Номер
968, С. 118440 - 118440
Опубликована: Июнь 13, 2024
Cobalt
ions
were
inserted
into
poly(3,4-ethylenedioxythiophene)
by
cyclic
voltammetry
in
a
0.1
M
CoNO32
aqueous
solution
(PEDOT(Co)).
After
activation
of
the
cobalt,
PEDOT(aCo)
system
was
investigated
voltammetry,
digital
video
electrochemistry,
spectroelectrogravimetry,
and
coupled
impedance
techniques
(ac-electrogravimetry)
to
elucidate
key
role
cobalt
altered
electrochemistry
PEDOT.
The
incorporation
Co2+
involves
slow
transfer
cations
for
charge
compensation
during
Co2+⇄Co3+
conversion
inside
This
fact
explains
enhanced
storage
showed
compared
with
pristine
PEDOT
at
similar
potentials.
Finally,
stability
measuring
same
time
current,
mass
motional
resistance
variation
100
cycles
offering
high
all
times.
Язык: Английский
EIS Behavior of Polyethylene + Graphite Composite Considered as an Approximation to an Ensemble of Microelectrodes
Journal of Composites Science,
Год журнала:
2024,
Номер
8(9), С. 378 - 378
Опубликована: Сен. 22, 2024
The
electrical
percolation
of
alternating
current
through
two-phase
polyethylene/graphite
composite
electrodes
with
different
contents
graphite
microparticles
immersed
in
aqueous
KCl
solutions
has
been
studied.
Above
the
content
first
threshold,
electrochemical
impedance
response
this
electrode
is
associated
an
equivalent
circuit
resistance
Ru
series
a
constant
phase
element
(CPE).
An
insulator
material
+
conducting
filler
model
proposed
which
electroactive
surface
considered
as
intersection
cluster
solid
and
interfacial
region.
CPE
analyzed
assuming
distribution
microcapacitors
particles
contact
dielectric
solution
inside
polymeric
phase.
Язык: Английский
Unlocking the Potential of Redox‐Active Copper Complexes in Thin Films via Proton‐Coupled Electron Transfer for Enhanced Supercapacitor Performance
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 4, 2024
Abstract
Nanoscale
redox‐active
molecular
films
are
promising
candidates
for
next‐generation
energy
storage
applications
due
to
their
ability
facilitate
long‐range
charge
transport.
However,
establishing
stable
and
efficient
electrode‐molecule
interfaces
remains
a
critical
challenge.
In
this
study,
the
properties
of
copper‐polypyridyl
thin
covalently
bonded
graphite
rods
explored,
investigating
potential
as
supercapacitors.
Using
an
electrochemical
grafting
method,
robust
covalent
created,
resulting
in
prepared
on
indium
tin
oxide
(ITO)
electrodes,
exhibiting
both
Cu(II)
Cu(I)
redox
states.
These
mettalo‐oligomeric
demonstrate
structural
transition
between
octahedral
tetrahedral
geometries
around
Cu(II),
Cu(I),
respectively
contributing
capabilities.
The
combination
electrical
double‐layer
capacitance
pseudocapacitance
through
Faradaic
transfer
is
evaluated
different
acidic
electrolytes,
showing
significant
enhancement.
Notably,
proton‐coupled
electron
(PCET)
at
free
pyridine‐N
sites
polypyridyl
complex
identified
key
factor
distinct
behavior
aqueous
solutions,
finding
supported
by
computational
studies.
This
study
shows
binder‐free
supercapacitor
applications,
with
maximum
areal
6.8
mF
cm⁻
2
media,
representing
1840%
improvement
over
bare
rods.
Язык: Английский