The Journal of Physical Chemistry Letters,
Journal Year:
2024,
Volume and Issue:
15(44), P. 11087 - 11096
Published: Oct. 29, 2024
MXenes
are
a
family
of
two-dimensional
(2D)
materials
with
broad
and
varied
applications
in
biology,
science,
photonics,
environmental
remediation
owing
to
their
layered
structure
high
surface
area-to-volume
ratio.
have
exhibited
significant
nonlinear
optical
characteristics,
which
been
primarily
explored
the
context
photonics
applications,
yet
second-harmonic
generation
(SHG)
behavior
remains
an
unexplored
aspect
properties.
Herein,
we
demonstrate
quantify
large
second-order
responses
2D
Ti3C2Tx
both
aqueous
solutions
on
silicon
substrate
for
first
time.
MXene
flakes
showed
strong
scattering
(SHS)
dilute
suspension
sensitivity
less
than
0.1
μg/mL.
Angle-dependent
SHS
experiments
further
found
that
originate
from
coherent
dipole
radiation.
Through
confocal
atomic
force
microscopies,
intense
SHG
signal
free-standing
increases
exponentially
decreasing
thickness,
while
two-photon
fluorescence
linearly
thickness.
The
susceptibility
was
determined
be
3.6
pm
V–1
thickness
10
nm,
almost
twice
often-used
crystal,
beta
barium
borate.
We
properties
sheets
by
investigating
upon
addition
organic
dye
molecules
system.
It
adsorption
crystal
violet
(CV)
obeys
Langmuir
model
malachite
green
(MG)
resulted
no
change
intensity,
even
though
capacities
CV
(61.3
±
1.7
mg/g)
MG
(54.8
2.8
similar.
Such
stark
difference
characteristics
between
cationic
dyes
is
likely
due
distinct
orientational
orderings
surfaces.
This
work
opens
many
possibilities
employment
optics,
catalysis
applications.
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
53(13), P. 7158 - 7201
Published: Jan. 1, 2024
Two-dimensional
(2D)
materials,
known
for
their
distinctive
electronic,
mechanical,
and
thermal
properties,
have
attracted
considerable
attention.
The
precise
atomic-scale
synthesis
of
2D
materials
opens
up
new
frontiers
in
nanotechnology,
presenting
novel
opportunities
material
design
property
control
but
remains
challenging
due
to
the
high
expense
single-crystal
solid
metal
catalysts.
Liquid
metals,
with
fluidity,
ductility,
dynamic
surface,
isotropy,
significantly
enhanced
catalytic
processes
crucial
synthesizing
including
decomposition,
diffusion,
nucleation,
thus
an
unprecedented
over
structures
properties.
Besides,
emergence
liquid
alloy
makes
creation
diverse
heterostructures
possible,
offering
a
dimension
atomic
engineering.
Significant
achievements
been
made
this
field
encompassing
defect-free
preparation,
large-area
self-aligned
array,
phase
engineering,
heterostructures,
Advanced Electronic Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 1, 2025
Abstract
The
high
contact
resistance
between
MoS
2
and
metals
hinders
its
potential
as
an
ideal
solution
for
overcoming
the
short‐channel
effect
in
silicon‐based
FETs
at
sub‐3
nm
scales.
A
‐based
transistor,
featuring
bilayer
connected
to
Cu‐intercalated
electrodes
is
theoretically
designed.
At
0.6
V,
16.7
Ω
µm
(zigzag)
30.0
(armchair),
nearing
or
even
surpassing
30
quantum
limit
single‐layer
materials.
This
low
attributed
elimination
of
tunneling
barrier
creation
ohmic
contacts.
Additionally,
small
difference
enables
lower
operating
voltages.
intercalation
design
offers
a
novel
approach
achieving
two‐dimentional
electronic
devices.
Small Methods,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 3, 2025
Abstract
2D
transition
metal
dichalcogenides
(2D
TMDCs)
have
attracted
intensive
interest
in
physics
and
materials
science‐related
fields,
due
to
their
exotic
properties
(e.g.,
superconductivity,
charge
density
wave
(CDW)
phase
transition,
magnetism,
electrocatalytic
property).
Intercalation
of
native
atoms
the
layered
TMDCs
from
VS
2
V
5
S
8
by
intercalation)
can
afford
new
stoichiometric
ratios,
states,
thus
rich
properties.
This
review
hereby
summarizes
recent
progress
controllable
syntheses,
structure
characterizations,
property
explorations
self‐intercalated
chalcogenides
(TMCs),
with
elements
focusing
on
group‐V,
VI,
VIII
metals.
The
self‐intercalation‐related
synthetic
strategies
will
be
introduced
via
chemical
vapor
deposition
(CVD)
molecule
beam
epitaxy
(MBE),
especially
tuning
potentials
intercalated
elements,
growth
promoters,
substrates,
etc.
Additionally,
structure/phase
identifications
TMCs
through
various
characterization
techniques
overviewed.
More
significantly,
intriguing
such
thoroughly
discussed,
as
thickness‐
or
composition‐dependent
CDW
property,
Finally,
challenges
prospects
are
proposed
for
developing
heterostructures
exploring
unique
applications.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 9, 2025
Van-der-Waals
hosts
intercalated
with
transition-metal
(TM)
ions
exhibit
a
range
of
magnetic
properties
strongly
influenced
by
the
structural
order
intercalants.
However,
predictive
computational
models
for
intercalant
ordering
phase
diagram
are
lacking,
complicating
experimental
pursuits
to
target
key
phases.
Here
we
use
density
functional
theory
(DFT)
construct
pairwise
lattice
model
and
Monte
Carlo
determine
its
associated
thermodynamic
diagram.
To
circumvent
complexities
modeling
effects,
diamagnetic
Zn2+
Sc3+
as
computationally
accessible
proxies
divalent
trivalent
species
interest
(Fe2+,
Co2+,
V3+
Cr3+),
which
provide
insights
into
well
above
paramagnetic
transition
temperature.
We
find
that
electrostatic
coupling
between
intercalants
is
almost
entirely
screened,
so
represents
coarse-grained
charge
reorganization.
The
resulting
reveals
entropically
favored
√3
×
coexisting
locally
ordered
2
domains
persist
across
temperatures
stoichiometries.
This
occurs
even
at
quarter-filling
interstitial
sites
(corresponding
bulk
stoichiometries
M0.25TaS2;
M
=
intercalant)
where
there
reports
coexistence
but
preference
long-range
often
assumed.
Accompanying
Raman
spectra
revealing
quenching-induced
in
2H-V0.25NbS2
supports
deficient
may
dominate
high
TM-intercalated
metal
dichalcogenides.
