Droplet,
Journal Year:
2024,
Volume and Issue:
3(2)
Published: March 25, 2024
Abstract
Droplets
and
bubbles
have
a
wide
range
of
applications
in
industry,
agriculture,
daily
life,
their
controllable
manipulation
is
significant
scientific
technological
importance.
Versatile
magnetically
responsive
strategies
been
developed
to
achieve
precise
control
over
droplets
bubbles.
To
manipulate
nonmagnetic
or
with
magnetic
fields,
the
presence
medium
indispensable.
Magnetic
additives
can
be
added
surface
interior
bubbles,
allowing
for
on‐demand
by
direct
actuation.
Alternatively,
elastomer
substrates
used
actuate
controlling
deformation
microstructures
on
through
stimulation.
Another
strategy
based
untethered
devices,
which
enables
free
mobility,
facilitating
versatile
flexible
manner.
This
paper
reviews
advances
from
perspective
An
overview
different
classes
medium,
along
respective
corresponding
droplet/bubble
methods
principles,
first
introduced.
Then,
biomedicine,
microchemistry,
other
fields
are
presented.
Finally,
remaining
challenges
future
opportunities
related
regulating
behavior
using
discussed.
Droplet,
Journal Year:
2023,
Volume and Issue:
2(2)
Published: March 16, 2023
Abstract
Droplet
impact
on
solid
surfaces
is
essential
both
in
nature
and
industry.
Precisely
regulating
the
dynamic
behavior
of
droplet
great
significance
for
energy
harvesting,
anti‐icing,
inkjet
printing,
pesticide
spraying,
many
other
fields.
Various
rebounding
behaviors
(deposition,
rebounding,
rotation,
instability
control,
so
on)
intrinsic
parameters
(such
as
contact
time)
after
droplets
impacting
can
be
regulated
by
surface
engineering.
This
paper
reviews
advances
from
perspective
symmetry
modifying
following
aspects:
chemical
modification
physical
structure
regulation,
which
discussed
mirror
rotational
symmetry.
Firstly,
dynamics
its
influencing
factors
are
introduced.
Then
modulation
symmetry,
using
homogeneous
heterogeneous
chemically
modified
surfaces,
summarized.
The
presents
influence
structures,
micro
to
macro
scale
compared
size,
Finally,
future
challenges
opportunities
regulation
discussed.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: Sept. 6, 2023
Abstract
The
versatile
manipulation
of
cross-scale
droplets
is
essential
in
many
fields.
Magnetic
excitation
widely
used
for
droplet
due
to
its
distinguishing
merits.
However,
facile
magnetic
actuation
strategies
are
still
lacked
realize
multiscale
manipulation.
Here,
a
type
magnetically
actuated
Janus
origami
robot
readily
fabricated
including
three-dimensional
transport,
merging,
splitting,
dispensing
and
release
daughter
droplets,
stirring
remote
heating.
allows
untethered
from
~3.2
nL
~51.14
μL.
It
enables
splitting
droplet,
precise
(minimum
nL)
~30.2
droplets.
combination
controlled
rotation
photothermal
properties
further
endows
the
with
ability
stir
heat
remotely.
Finally,
application
polymerase
chain
reaction
(PCR)
explored.
extraction
purification
nucleic
acids
can
be
successfully
achieved.
International Journal of Extreme Manufacturing,
Journal Year:
2023,
Volume and Issue:
5(2), P. 025502 - 025502
Published: Feb. 17, 2023
Highlights
Various
cross-sectional
bionic
microchannels
were
fabricated
by
P
µ
SL
based
3D
printing
technique.
Strong
precursor
effects
are
induced
sharp
corners
of
those
microchannels.
Ultra-long
distance
antigravity
step
lifting
water
is
realized
employing
Mimicked
transpiration
on
well
achieved.
ACS Nano,
Journal Year:
2023,
Volume and Issue:
18(1), P. 526 - 538
Published: Dec. 19, 2023
The
accumulation
of
ice
on
surfaces
will
bring
safety
issues
to
various
human
activities.
Researchers
have
been
actively
developing
superhydrophobic
(SHS)
as
good
anti-icing
materials.
However,
some
limitations,
such
high
cost,
complexity
preparation,
and
lack
sufficient
durability
in
extreme
environments,
restrict
their
practical
applications.
Inspired
by
bronchial
mucosa
cilia
structure
the
lotus
leaf
structure,
we
generated
ordered
magnetic
microcilia
arrays
(MMA)
within
1
min
a
fast
controllable
microhole
assisted
magnetic-induced
self-growth
method.
Fluoride-free
MMA
(SMMA)
was
prepared
impregnating
into
hexadecyltrimethoxysilane
(HDTMS)
modified
SiO2
solution.
SMMA
exhibits
excellent
static
performance,
which
can
significantly
delay
freezing
droplets
supercooled
environments.
surface
still
maintains
dynamic
performance
at
−30
°C
after
100
times
droplet
impact.
Furthermore,
shows
for
up
2
months
low
temperatures
(−18
°C).
Due
sensitive
response
bending
properties
cilia,
also
demonstrate
outstanding
multifunctional
manipulation
under
field.
has
ability
vertically
capture
release
droplets.
achieve
horizontal
transport
droplets,
mixing
microchemical
detection,
antigravity
an
8°
inclined
array,
even
complex
objects
be
easily
transported.
More
importantly,
mechanical
chemical
stability.
It
provides
insights
preparation
integrated
using
simple
green
low-cost
Nano Letters,
Journal Year:
2023,
Volume and Issue:
23(11), P. 4947 - 4955
Published: May 31, 2023
Droplet
steering
has
important
applications
in
biomedical
detection,
local
chemical
reactions,
liquid
collection,
and
microfluidic
control.
Presently,
droplet
methods
typically
require
specific
paths
can
be
challenging
to
operate,
involving
complex
fabrications
for
the
operating
systems.
Here,
we
show
a
magnetically
actuated
superhydrophilic
robot
sphere
(MSR)
based
on
femtosecond
laser
direct
writing
technology
steering.
Through
treatment,
uniform
micro-/nanostructures
are
constructed
surface
of
MSR.
Additionally,
contactless
magnetic
actuator
makes
it
possible
remotely
steer
MSR
transport
droplets.
After
preliminary
exploration
mechanism
by
which
drives
movement,
ability
control
movement
was
systematically
tested
analyzed.
Moreover,
path
collection
transport,
three-dimensional
space
self-cleaning,
etc.,
further
verified.
This
strategy
provides
novel
reliable
manipulation
broadens
its
application.
Nanomaterials,
Journal Year:
2023,
Volume and Issue:
13(12), P. 1818 - 1818
Published: June 7, 2023
A
microstructure
determines
macro
functionality.
controlled
periodic
structure
gives
the
surface
specific
functions
such
as
structural
color,
wettability,
anti-icing/frosting,
friction
reduction,
and
hardness
enhancement.
Currently,
there
are
a
variety
of
controllable
structures
that
can
be
produced.
Laser
interference
lithography
(LIL)
is
technique
allows
for
simple,
flexible,
rapid
fabrication
high-resolution
over
large
areas
without
use
masks.
Different
conditions
produce
wide
range
light
fields.
When
an
LIL
system
used
to
expose
substrate,
textured
structures,
nanoparticles,
dot
arrays,
hole
stripes,
The
not
only
on
flat
substrates,
but
also
curved
or
partially
taking
advantage
depth
focus.
This
paper
reviews
principles
discusses
how
parameters,
spatial
angle,
angle
incidence,
wavelength,
polarization
state,
affect
field.
Applications
functional
fabrication,
anti-reflection,
surface-enhanced
Raman
scattering
(SERS),
superhydrophobicity,
biocellular
modulation,
presented.
Finally,
we
present
some
challenges
problems
in
its
applications.
Nano Letters,
Journal Year:
2023,
Volume and Issue:
23(12), P. 5696 - 5704
Published: June 8, 2023
A
surface
with
asymmetric
microstructures
for
self-driven
directional
spreading
of
liquid
has
attracted
keen
interest
from
researchers
in
recent
years
its
great
application
prospects.
Inspired
by
the
jaws
tiny
insects,
such
as
ants,
a
textured
novel
jaw-like
micro
one-way
valves
is
reported.
These
are
almost
two-dimensional,
thus
being
simple
and
easy
to
fabricate.
Whereas
surfaces
exhibit
amazing
rapid
long-distance
water
droplet
unidirectional
behaviors.
The
maximum
forward–backward
distance
ratio
droplets
on
optimized
about
14.5,
twice
those
previous
research.
capillary
attraction
at
location
mouth
pinning
effect
brought
sharp
edge
precursor
film
analyzed
deduced
main
mechanisms.
findings
open
promising
avenue
2D
microstructure
design
effective
spreading.
