Advanced Materials,
Год журнала:
2023,
Номер
35(25)
Опубликована: Март 30, 2023
Hydrodynamic
forces
from
moving
fluids
can
be
utilized
to
remove
contaminants
which
is
an
ideal
fouling-release
strategy
for
underwater
surfaces.
However,
the
hydrodynamic
in
viscous
sublayer
are
greatly
reduced
owing
no-slip
condition,
restricts
their
practical
applications.
Here,
inspired
by
sweeper
tentacles
of
corals,
active
self-cleaning
surface
with
flexible
filament-like
sweepers
reported.
The
penetrate
utilizing
energy
outer
turbulent
flows
and
adhesion
strength
>30
kPa.
Under
oscillating
flow,
removal
rate
single
reach
up
99.5%
due
dynamic
buckling
movements.
In
addition,
array
completely
clean
its
coverage
area
within
10
s
through
coordinated
movements
as
symplectic
waves.
depends
on
fluid-structure
coupling
between
flows,
breaks
concept
conventional
self-cleaning.
Nature Communications,
Год журнала:
2020,
Номер
11(1)
Опубликована: Май 26, 2020
Abstract
Metachronal
waves
commonly
exist
in
natural
cilia
carpets.
These
emergent
phenomena,
which
originate
from
phase
differences
between
neighbouring
self-beating
cilia,
are
essential
for
biological
transport
processes
including
locomotion,
liquid
pumping,
feeding,
and
cell
delivery.
However,
studies
of
such
complex
active
systems
limited,
particularly
the
experimental
side.
Here
we
report
magnetically
actuated,
soft,
artificial
By
stretching
folding
onto
curved
templates,
programmable
magnetization
patterns
can
be
encoded
into
carpets,
exhibit
metachronal
dynamic
magnetic
fields.
We
have
tested
both
capabilities
a
fluid
environment
locomotion
on
solid
surface.
This
robotic
system
provides
highly
customizable
platform
that
not
only
assists
understanding
fundamental
rules
but
also
paves
path
to
cilia-inspired
soft
robots
future
biomedical
applications.
The Journal of Mathematical Neuroscience,
Год журнала:
2020,
Номер
10(1)
Опубликована: Май 27, 2020
Abstract
Many
biological
and
neural
systems
can
be
seen
as
networks
of
interacting
periodic
processes.
Importantly,
their
functionality,
i.e.,
whether
these
perform
function
or
not,
depends
on
the
emerging
collective
dynamics
network.
Synchrony
oscillations
is
one
most
prominent
examples
such
behavior
has
been
associated
both
with
dysfunction.
Understanding
how
network
structure
interactions,
well
microscopic
properties
individual
units,
shape
critical
to
find
factors
that
lead
malfunction.
However,
many
brain
consist
a
large
number
dynamical
units.
Hence,
analysis
either
relied
simplified
heuristic
models
coarse
scale,
comes
at
huge
computational
cost.
Here
we
review
recently
introduced
approaches,
known
Ott–Antonsen
Watanabe–Strogatz
reductions,
allowing
simplify
by
bridging
small
scales.
Thus,
reduced
model
equations
are
obtained
exactly
describe
for
each
subpopulation
in
oscillator
via
few
variables
only.
The
resulting
next-generation
models:
Rather
than
being
heuristic,
they
link
macroscopic
descriptions
therefore
accurately
capture
underlying
system.
At
same
time,
sufficiently
simple
analyze
without
great
effort.
In
last
decade,
reduction
methods
have
become
instrumental
understanding
interactions
emergence
synchrony.
We
this
progress
based
concrete
outline
possible
limitations.
Finally,
discuss
linking
experimental
data
guide
way
towards
development
new
treatment
example,
neurological
disease.
Cell,
Год журнала:
2023,
Номер
186(13), С. 2880 - 2896.e17
Опубликована: Июнь 1, 2023
Sperm
motility
is
crucial
to
reproductive
success
in
sexually
reproducing
organisms.
Impaired
sperm
movement
causes
male
infertility,
which
increasing
globally.
are
powered
by
a
microtubule-based
molecular
machine—the
axoneme—but
it
unclear
how
axonemal
microtubules
ornamented
support
diverse
fertilization
environments.
Here,
we
present
high-resolution
structures
of
native
doublet
(DMTs)
from
sea
urchin
and
bovine
sperm,
representing
external
internal
fertilizers.
We
identify
>60
proteins
decorating
DMTs;
at
least
15
associated
16
linked
infertility.
By
comparing
DMTs
across
species
cell
types,
define
core
microtubule
inner
(MIPs)
analyze
evolution
the
tektin
bundle.
conserved
microtubule-associated
(MAPs)
with
unique
tubulin-binding
modes.
Additionally,
testis-specific
serine/threonine
kinase
that
links
outer
dense
fibers
mammalian
sperm.
Our
study
provides
structural
foundations
for
understanding
evolution,
motility,
dysfunction
level.
Abstract
Nature
provides
a
successful
evolutionary
direction
for
single‐celled
organisms
to
solve
complex
problems
and
complete
survival
tasks
–
pseudopodium.
Amoeba,
unicellular
protozoan,
can
produce
temporary
pseudopods
in
any
by
controlling
the
directional
flow
of
protoplasm
perform
important
life
activities
such
as
environmental
sensing,
motility,
predation,
excretion.
However,
creating
robotic
systems
with
pseudopodia
emulate
adaptability
tasking
capabilities
natural
amoeba
or
amoeboid
cells
remains
challenging.
Here,
this
work
presents
strategy
that
uses
alternating
magnetic
fields
reconfigure
droplet
into
Amoeba‐like
microrobot,
mechanisms
generation
locomotion
are
analyzed.
By
simply
adjusting
field
direction,
microrobots
switch
monopodia,
bipodia,
modes,
performing
all
pseudopod
operations
active
contraction,
extension,
bending,
movement.
The
endow
robots
excellent
maneuverability
adapt
variations,
including
spanning
3D
terrains
swimming
bulk
liquids.
Inspired
“Venom,”
phagocytosis
parasitic
behaviors
have
also
been
investigated.
Parasitic
droplets
inherit
robot,
expanding
their
applicable
scenarios
reagent
analysis,
microchemical
reactions,
calculi
removal,
drug‐mediated
thrombolysis.
This
microrobot
may
provide
fundamental
understanding
livings,
potential
applications
biotechnology
biomedicine.
The European Physical Journal E,
Год журнала:
2025,
Номер
48(2)
Опубликована: Фев. 1, 2025
In
the
past
years,
amount
of
research
on
active
matter
has
grown
extremely
rapidly,
a
fact
that
is
reflected
in
particular
by
existence
more
than
1000
reviews
this
topic.
Moreover,
field
become
very
diverse,
ranging
from
theoretical
studies
statistical
mechanics
particles
to
applied
work
medical
applications
microrobots
and
biological
systems
artificial
swimmers.
This
makes
it
difficult
get
an
overview
over
as
whole.
Here,
we
provide
such
form
metareview
article
surveys
existing
review
articles
books
matter.
Thereby,
provides
useful
starting
point
for
finding
literature
about
specific
Flagellar
beating
drives
sperm
through
the
female
reproductive
tract
and
is
vital
for
reproduction.
waves
are
generated
by
thousands
of
asymmetric
molecular
components;
yet,
paradoxically,
forward
swimming
arises
via
symmetric
side-to-side
flagellar
movement.
This
led
to
preponderance
control
hypotheses.
However,
asymmetries
must
still
dictate
flagellum
be
manifested
in
beat.
Here,
we
reconcile
microscopic
observations,
reconnecting
structure
function,
showing
that
human
uses
anisotropic
controls
swim.
High-speed
three-dimensional
(3D)
microscopy
revealed
two
coactive
transversal
controls:
An
traveling
wave
creates
a
one-sided
stroke,
pulsating
standing
rotates
move
equally
on
all
sides.
Symmetry
thus
achieved
asymmetry,
creating
optical
illusion
bilateral
symmetry
2D
microscopy.
shows
asymmetrically
controlled
anisotropically
regularized
fast-signal
transduction.
enables
swim
forward.
Proceedings of the National Academy of Sciences,
Год журнала:
2022,
Номер
119(4)
Опубликована: Янв. 19, 2022
Significance
Understanding
the
emergence
and
properties
of
metachronal
waves
(MWs)
in
ciliary
arrays
is
a
multiscale
problem
central
to
developmental
biology,
transport
phenomena,
nonequilibrium
physics,
with
potential
biomedical
applications.
For
1D
lattices
cilia,
we
report
key
mechanisms
that
lead
robust
MWs.
Our
modeling
framework
incorporates
full
microscopic
details
beating
cilia.
This
helps
us
understand
how
bed
morphology,
patterns,
steric
hydrodynamic
interactions
work
together
shape
emergent
dynamics
on
lattices.
Due
novelty
our
computation,
have
unraveled
spatiotemporal
self-organization
nanometeric
motor
proteins
coordinating
collective
spanning
millimeters:
bridging
length
scales
over
six
orders
magnitude.
