Chemical Science,
Journal Year:
2022,
Volume and Issue:
13(26), P. 7707 - 7738
Published: Jan. 1, 2022
Two-dimensional
(2D)
transition
metal
dichalcogenides
(TMDs)
and
their
heterostructures
have
attracted
significant
interest
in
both
academia
industry
because
of
unusual
physical
chemical
properties.
They
offer
numerous
applications,
such
as
electronic,
optoelectronic,
spintronic
devices,
addition
to
energy
storage
conversion.
Atomic
structural
modifications
van
der
Waals
layered
materials
are
required
achieve
unique
versatile
properties
for
advanced
applications.
This
review
presents
a
discussion
on
the
atomic-scale
2D
TMDs
Chemical Reviews,
Journal Year:
2022,
Volume and Issue:
122(6), P. 6514 - 6613
Published: Feb. 8, 2022
A
grand
family
of
two-dimensional
(2D)
materials
and
their
heterostructures
have
been
discovered
through
the
extensive
experimental
theoretical
efforts
chemists,
material
scientists,
physicists,
technologists.
These
pioneering
works
contribute
to
realizing
fundamental
platforms
explore
analyze
new
physical/chemical
properties
technological
phenomena
at
micro-nano-pico
scales.
Engineering
2D
van
der
Waals
(vdW)
via
chemical
physical
methods
with
a
suitable
choice
stacking
order,
thickness,
interlayer
interactions
enable
exotic
carrier
dynamics,
showing
potential
in
high-frequency
electronics,
broadband
optoelectronics,
low-power
neuromorphic
computing,
ubiquitous
electronics.
This
comprehensive
review
addresses
recent
advances
terms
representative
materials,
general
fabrication
methods,
characterization
techniques
vital
role
parameters
affecting
quality
heterostructures.
The
main
emphasis
is
on
3D-bulk
(3D)
hybrid
systems
exhibiting
intrinsic
quantum
mechanical
responses
optical,
valley,
topological
states.
Finally,
we
discuss
universality
applications
trends
for
future
electronics
optoelectronics
(FEO)
under
challenges
opportunities
from
physical,
nanotechnological,
synthesis
perspectives.
Journal of Materials Chemistry C,
Journal Year:
2021,
Volume and Issue:
9(7), P. 2464 - 2473
Published: Jan. 1, 2021
Janus
two-dimensional
(2D)
materials
have
attracted
much
attention
due
to
possessing
unique
properties
caused
by
their
out-of-plane
asymmetry,
which
been
achieved
in
many
2D
families.
In
this
work,
the
monolayers
are
predicted
new
$\mathrm{MA_2Z_4}$
family
means
of
first-principles
calculations,
$\mathrm{MoSi_2N_4}$
and
$\mathrm{WSi_2N_4}$
synthesized
experiment(\textcolor[rgb]{0.00,0.00,1.00}{Science
369,
670-674
(2020)}).
The
$\mathrm{MSiGeN_4}$
(M=Mo
W)
exhibit
dynamic,
thermodynamical
mechanical
stability,
they
indirect
band-gap
semiconductors.
inclusion
spin-orbit
coupling
(SOC)
gives
rise
Rashba-type
spin
splitting,
is
observed
valence
bands,
being
different
from
common
conduction
bands.
Calculated
results
show
valley
polarization
at
edge
bands
SOC
together
with
inversion
symmetry
breaking.
It
found
that
high
electron
mobilities.
Both
in-plane
weak
piezoelectric
polarizations
can
be
observed,
when
a
uniaxial
strain
basal
plane
applied.
values
coefficient
$d_{11}$
fall
between
those
$\mathrm{MSi_2N_4}$
$\mathrm{MGe_2N_4}$
monolayers,
as
expected.
proved
tune
positions
band
maximum
(VBM)
minimum
(CBM),
enhance
strength
convergence
compressive
strain.
also
tensile
biaxial
improve
$d_{31}$
(absolute
values).
Nanoscale,
Journal Year:
2021,
Volume and Issue:
13(4), P. 2511 - 2518
Published: Jan. 1, 2021
The
usage
of
WxNb(1−x)Se2
nanosheets
as
a
rising
ultrafast
photonic
device
to
generate
high
power
mode-locked
and
Q-switched
pulses
in
fiber
laser
is
demonstrated.
In
this
work,
we
perform
a
first-principle
study
to
investigate
the
atomic
and
electronic
structures
of
${\mathrm{C}}_{3}{\mathrm{N}}_{4}/{\mathrm{MoSi}}_{2}{\mathrm{N}}_{4}$
van
der
Waals
heterostructure
(vdWH)
as
well
its
tunable
structure
via
interlayer
coupling
an
external
perpendicular
electric
field.
The
vdWH
is
structurally
thermodynamically
stable
at
room
temperature.
Our
results
demonstrate
that
exhibits
semiconducting
characteristic
with
direct
band
gap
1.86/2.66
eV
given
by
PBE/HSE06
calculation.
This
value
conveniently
lies
in
visible
light
energy
range,
thus
unraveling
strong
optical
absorption
technologically
important
regime.
edges
separately
from
${\mathrm{C}}_{3}{\mathrm{N}}_{4}$
${\mathrm{MoSi}}_{2}{\mathrm{N}}_{4}$
layers,
resulting
type-II
alignment,
which
highly
desirable
for
achieving
efficient
electron-hole
separation.
Remarkably,
alignment
types
can
be
flexibly
tuned
between
type-I
applying
field,
changing
distance
in-plane
strain.
findings
reveal
potential
hybrid
material
optoelectronic
applications.
Journal of Physics D Applied Physics,
Journal Year:
2023,
Volume and Issue:
56(48), P. 483001 - 483001
Published: Aug. 30, 2023
Abstract
Hydrogen
production
through
photocatalytic
water
splitting
is
being
developed
swiftly
to
address
the
ongoing
energy
crisis.
Over
past
decade,
with
rise
of
graphene
and
other
two-dimensional
(2D)
materials,
an
increasing
number
computational
experimental
studies
have
focused
on
relevant
van
der
Waals
(vdW)
semiconductor
heterostructures
for
splitting.
In
this
review,
fundamental
mechanism
distinctive
performance
type-II
Z-scheme
vdW
heterostructure
photocatalysts
are
presented.
Accordingly,
we
conducted
a
systematic
review
recent
focusing
candidates
photocatalysts,
specifically
involving
2D
transition
metal
disulfides
(TMDs),
Janus
TMDs,
phosphorenes.
The
these
their
suitability
in
theoretical
scenarios
discussed
based
electronic
optoelectronic
properties,
particularly
terms
band
structures,
photoexcited
carrier
dynamics,
light
absorption.
addition,
various
approaches
tuning
potential
illustrated.
This
strategic
framework
constructing
modulating
expected
provide
inspiration
addressing
possible
challenges
future
studies.
International Journal of Extreme Manufacturing,
Journal Year:
2023,
Volume and Issue:
5(3), P. 032002 - 032002
Published: April 17, 2023
Abstract
The
exceptional
physical
properties
and
unique
layered
structure
of
two-dimensional
(2D)
materials
have
made
this
class
great
candidates
for
applications
in
electronics,
energy
conversion/storage
devices,
nanocomposites,
multifunctional
coatings,
among
others.
At
the
center
application
space,
mechanical
play
a
vital
role
design,
manufacturing,
integration
performance.
emergence
2D
has
also
sparked
broad
scientific
inquiry,
with
new
understanding
interactions
between
structures
interfaces
being
interest
to
community.
Building
on
dramatic
expansion
recent
research
activities,
here
we
review
significant
advances
elastic
properties,
in-plane
failures,
fatigue
performance,
interfacial
shear/friction,
adhesion
behavior
materials.
In
article,
special
emphasis
is
placed
some
materials,
novel
characterization
techniques
computational
methods,
as
well
insights
into
deformation
failure
mechanisms.
A
deep
intrinsic
extrinsic
factors
that
govern
material
mechanics
further
provided,
hopes
community
may
draw
design
strategies
structural
engineering
systems.
We
end
article
discussion
our
perspective
state
field
outlook
areas
future
directions.
Two-dimensional
(2D)
Janus
materials
due
to
their
asymmetric
structures
show
fascinating
spintronic
and
piezoelectric
properties
making
them
a
research
hot
spot
in
recent
years.
In
this
work,
inspired
by
group-III
monochalcogenides,
we
propose
$\mathrm{Zn}AXY$
($A=\mathrm{Si}$,
Ge,
Sn,
$X/Y=\mathrm{S}$,
Se,
Te,
$X
