Micromachines,
Год журнала:
2024,
Номер
15(6), С. 808 - 808
Опубликована: Июнь 20, 2024
Creatures
in
nature
make
extensive
use
of
structural
color
adaptive
camouflage
to
survive.
Cholesteric
liquid
crystals,
with
nanostructures
similar
those
natural
organisms,
can
be
combined
actuators
produce
bright
colors
response
a
wide
range
stimuli.
Structural
modulated
by
nano-helical
structures
continuously
and
selectively
reflect
specific
wavelengths
light,
breaking
the
limit
recognizable
human
eye.
In
this
review,
current
state
research
on
cholesteric
crystal
photonic
their
technological
applications
is
presented.
First,
basic
concepts
crystals
nanostructural
modulation
are
outlined.
Then,
responding
different
stimuli
(mechanical,
thermal,
electrical,
humidity,
magnetic,
pneumatic)
This
review
describes
practical
summarizes
prospects
for
development
these
advanced
as
well
challenges
promising
applications.
Abstract
Liquid
crystal
polymers
(LCPs)
have
gained
tremendous
attention
in
recent
years
due
to
their
great
potentials
from
fabrication
of
responsive
actuators
and
sensors
construction
intelligent
soft
robotic
light
modulators.
However,
conventional
LCPs
with
permanent
cross‐links
present
tedious
unmodifiable
stimuli‐responsiveness.
Recently,
dynamic
bonds
capable
reversibly
break
reform
been
integrated
into
LCP,
imparting
intrinsic
characteristics.
The
LCP
possesses
unprecedented
diverse
functionalities
including
reprogrammability,
recyclability,
self‐healing
ability,
becoming
much
more
adaptive
surrounding
environmental
changes
compared
the
counterpart.
In
this
review,
progress
bond‐based
is
summarized.
mechanism,
preparation,
based
on
noncovalent
bond
(DNCB)
covalent
(DCB)
are
poised
be
discussed,
followed
by
introducing
emergent
combining
both
DNCB
DCB.
Consequently,
unique
will
given.
Finally,
outlooks
development
presented.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Май 23, 2024
Abstract
Inspired
by
intriguing
color
changeable
ability
of
natural
animals,
the
design
and
fabrication
artificial
mechanochromic
materials
capable
changing
colors
upon
stretching
or
pressing
have
attracted
intense
scientific
interest.
Liquid
crystal
(LC)
is
a
self‐organized
soft
matter
with
anisotropic
molecular
alignment.
Due
to
sensitivity
various
external
stimulations,
LC
has
been
considered
as
an
emerging
appealing
responsive
building
block
construct
intelligent
advanced
devices.
Recently,
becoming
hot
topic
in
multifields
from
flexible
skins
visualized
sensors
smart
biomimetic
In
this
review,
recent
progress
LCs
comprehensively
summarized.
Firstly,
mechanism
functionalities
introduced,
followed
preparation
functional
based
on
LCs.
Then
applications
are
provided.
Finally,
conclusion
outlooks
field
given.
This
overview
hoped
provide
inspiration
for
scientists
engineers
multidisciplines
including
science,
elastomers,
chemistry,
physical
science.
Abstract
Smart
chiral
liquid
crystal
elastomers
are
a
class
of
soft
photonic
crystals
with
periodic
nanostructures.
There
two
kinds
structural
colors:
cholesteric
one‐dimensional
helical
nanostructure
and
blue‐phase
three‐dimensional
nanostructure.
The
self‐assembled
can
be
dynamically
controlled
under
external
stimulation,
the
reflected
color
adjusted
throughout
visible
light
range.
Along
development
innovative
material
systems
cutting‐edge
manufacturing
technologies,
researchers
have
proposed
diverse
strategies
to
design
synthesize
thoroughly
investigated
their
properties
potential
applications.
Here,
we
provide
systematic
review
progress
in
fabrication
smart
elastomers,
focusing
on
via
surface‐enforced
alignment,
bar
coating,
3D
printing,
anisotropic
deswelling
methods
as
well
self‐assembly
without
additional
alignment.
able
respond
quickly
stimuli
wide
range
applications
areas
such
adaptive
optics,
color‐changing
camouflage,
robotics,
information
encryption.
This
concludes
perspective
opportunities
challenges
for
future
elastomers.
Abstract
The
capacity
of
biological
tissues
to
undergo
self‐healing
is
crucial
for
the
performance
functions
and
continuation
life.
Conventional
intrinsic
materials
demonstrate
analogous
functionality
depending
on
dissociation‐recombination
reversible
bonds
with
no
need
extra
repair
agents.
However,
trade‐off
relationship
between
mechanical
strength
kinetics
in
systems,
coupled
lack
additional
functionality,
restricts
their
service
life
practical
applications.
Diversified
highly
ordered
structures
organisms
significantly
affect
energy
dissipation
mechanism,
signal
transmission
efficiency,
molecular
network
reconstruction
capability
due
multi‐dimensional
differentiated
macroscopic
composite
constructions,
microscopic
orientation
textures,
topologies/bonding
types
at
level.
These
architectures
exhibit
distinctive
strengthening
mechanisms
functionalities,
which
provide
valuable
references.
This
review
aims
providing
current
status
advanced
biomimetic
internal
micro/nanostructures.
Through
highlighting
specific
examples,
classifications,
design
inspirations,
fabrication
strategies
these
newly
developed
based
integrating
dynamic
interactions
nano/microstructures
are
outlined.
Furthermore,
balance
mechanisms,
structure–functionalization
relationships,
potential
application
values
discussed.
concludes
a
perspective
challenges,
opportunities,
prospects
development,
application,
promotion
self‐healable
bio‐like
architectures.
This
review
paper
examines
the
innovative
use
of
liquid
crystals
(LCs)
as
phase
change
materials
in
thermal
energy
storage
systems.
With
rising
demand
for
efficient
storage,
LCs
offer
unique
opportunities
owing
to
their
tunable
transitions,
high
latent
heat,
and
favorable
conductivity.
covers
various
types
LCs,
such
nematic,
smectic,
cholesteric
phases,
roles
enhancing
storage.
It
discusses
mechanisms
LC
transitions
impact
on
efficiency.
Strategies
improve
conductivities
polymers
have
also
been
explored.
One
method
involves
embedding
units
within
molecular
structure
promote
orderly
arrangement,
facilitate
heat
flow,
reduce
phonon
scattering.
Aligning
polymer
chains
through
external
fields
or
mechanical
processes
significantly
improves
intrinsic
The
inclusion
thermally
conductive
fillers
optimization
filler-matrix
interactions
further
boost
performance.
Challenges
related
scalability,
cost-effectiveness,
long-term
stability
LC-based
are
addressed,
along
with
future
research
directions.
synthesizes
current
knowledge
identifies
gaps
literature,
providing
a
valuable
resource
researchers
engineers
develop
advanced
technologies,
contributing
sustainable
solutions.
Abstract
Visual
sensing
of
humidity
and
temperature
by
solids
plays
an
important
role
in
the
everyday
life
industrial
processes.
Due
to
their
hydrophobic
nature,
most
covalent
organic
framework
(COF)
sensors
often
exhibit
poor
optical
response
when
exposed
moisture.
To
overcome
this
challenge,
is
set
out
improve,
moisture
incorporating
H‐bonding
ionic
functionalities
into
COF
network.
A
highly
sensitive
COF,
consisting
guanidinium
diformylpyridine
linkers
(TG‐DFP),
capable
detecting
changes
content
fabricated.
The
hydrophilic
nature
enables
enhanced
water
uptake,
allowing
trapped
molecules
form
a
large
number
hydrogen
bonds.
Despite
presence
non‐emissive
building
blocks,
H‐bonds
restrict
internal
bond
rotation
within
leading
reversible
fluorescence
solid‐state
hydrochromism
relative
temperature.
IEEE Sensors Journal,
Год журнала:
2024,
Номер
24(13), С. 20289 - 20311
Опубликована: Май 17, 2024
The
advent
of
the
5G
era
means
that
concepts
robot,
VR/AR,
UAV,
smart
home,
healthcare
based
on
IoT
(Internet
Things)
have
gradually
entered
human
life.
Since
then,
intelligent
life
has
become
dominant
direction
social
development.
Humidity
sensors,
as
humidity
detection
tools,
not
only
convey
comfort
living
environment,
but
also
display
great
significance
in
fields
meteorology,
medicine,
agriculture
and
industry.
Graphene-based
materials
exhibit
tremendous
potential
sensing
owing
to
their
ultra-high
specific
surface
area
excellent
electron
mobility
under
room
temperature
for
application
sensing.
This
review
begins
with
introduction
examples
various
synthesis
strategies
graphene,
followed
by
device
structure
working
mechanism
graphene-based
sensor.
In
addition,
several
different
structural
design
methods
graphene
are
summarized,
demonstrating
can
optimize
performance
bring
significant
advantages
Finally,
key
challenges
hindering
further
development
practical
high-performance
sensors
discussed,
presenting
future
perspectives.
