Frozen by Heating: Temperature Controlled Dynamic States in Droplet Microswimmers

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Self-propelling active matter relies on the conversion of energy from undirected, nanoscopic scale to directed, macroscopic motion. One challenges in design synthetic lies control dynamic states, or motility gaits. Here, an experimental system self-propelling droplets with thermally controllable and reversible states is presented, unsteady over meandering persistent arrested These are known depend Péclet number molecular process powering motion, which can now be tuned by using a temperature sensitive mixture surfactants as propulsion fuel. The droplet dynamics quantified analyzing flow chemical fields for individual comparing them canonical models autophoretic particles. In context these models, situ, fundamental first broken symmetry that translates isotropic, immotile base state self-propelled motility, experimentally demonstrated.

Language: Английский

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Helix Inversion Controlled by Molecular Motors in Multistate Liquid Crystals

Advanced Materials, Journal Year: 2020, Volume and Issue: 32(47)

Published: Oct. 18, 2020

Abstract Unravelling the rules of molecular motion is a contemporary challenge that promises to support development responsive materials and likely enhance understanding functional motion. Advances in integrating light‐driven motors soft matter have led design realization chiral nematic (cholesteric) liquid crystals can respond light with modification their helical pitch, also helix inversion. Under illumination, these convert from one geometry another. Here, series feature rich configurational landscape presented, specifically which involves three stable states. The succession structures involved motor cycle transmitted at higher structural levels, as cholesteric are formed interconvert between helices opposite handedness, reversibly. In materials, dynamic features thus expressed near‐macroscopic, level, into addressable colors be used advanced for tunable optics photonics.

Language: Английский

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Synthetic Supramolecular Systems in Life-like Materials and Protocell Models

Chem, Journal Year: 2020, Volume and Issue: 6(7), P. 1652 - 1682

Published: June 25, 2020

Language: Английский

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Control of Helical Navigation by Three-Dimensional Flagellar Beating

Physical Review Letters, Journal Year: 2021, Volume and Issue: 126(8)

Published: Feb. 24, 2021

Helical swimming is a ubiquitous strategy for motile cells to generate self-gradients environmental sensing. The model biflagellate Chlamydomonas reinhardtii rotates at constant 1–2 Hz as it swims, but the mechanism unclear. Here, we show unequivocally that rolling motion derives from persistent, nonplanar flagellar beat pattern. This revealed by high-speed imaging and micromanipulation of live cells. We construct fully 3D relate beating directly free-swimming trajectories. For realistic geometries, reproduces both sense magnitude axial rotation helical requires further symmetry breaking between two flagella. These functional differences underlie all tactic responses, particularly phototaxis. propose control which steer toward or away light modulating sign biflagellar dominance.Received 27 September 2020Revised 10 December 2020Accepted 13 January 2021DOI:https://doi.org/10.1103/PhysRevLett.126.088003Published American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution this work must maintain attribution author(s) published article's title, journal citation, DOI.Published SocietyPhysics Subject Headings (PhySH)Research AreasBiological fluid dynamicsCell locomotionSwimmingPhysical SystemsCiliaMicroswimmersBiological PhysicsFluid Dynamics

Language: Английский

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Exploration of molecular machines in supramolecular soft robotic systems

Advances in Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 315, P. 102892 - 102892

Published: April 7, 2023

Language: Английский

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Light, Matter, Action: Shining Light on Active Matter

ACS Photonics, Journal Year: 2023, Volume and Issue: 10(5), P. 1188 - 1201

Published: April 17, 2023

Light carries energy and momentum. It can therefore alter the motion of objects on atomic to astronomical scales. Being widely available, readily controllable, broadly biocompatible, light is also an ideal tool propel microscopic particles, drive them out thermodynamic equilibrium, make active. Thus, light-driven particles have become a recent focus research in field soft active matter. In this Perspective, we discuss advances control matter with light, which has mainly been achieved using intensity. We highlight some first attempts utilize light's additional properties, such as its wavelength, polarization, then argue that fully exploiting all properties will play critical role increasing level over actuation well flow itself through it. This enabling step advance design systems, their functionalities, transfer toward technological applications.

Language: Английский

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Enantiomeric alkynyl-protected Au10 clusters with chirality-dependent radiotherapy enhancing effects

Nano Today, Journal Year: 2021, Volume and Issue: 39, P. 101222 - 101222

Published: June 16, 2021

Language: Английский

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Engineering motile aqueous phase-separated droplets via liposome stabilisation

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: March 15, 2021

Abstract There are increasing efforts to engineer functional compartments that mimic cellular behaviours from the bottom-up. One behaviour is receiving particular attention motility, due its biotechnological potential and ubiquity in living systems. Many existing platforms make use of Marangoni effect achieve motion water/oil (w/o) droplet However, most these systems unsuitable for biological applications biocompatibility issues caused by presence oil phases. Here we report a biocompatible all aqueous (w/w) PEG/dextran Pickering-like emulsion system consisting liposome-stabilised cell-sized droplets, where stability can be easily tuned adjusting liposome composition concentration. We demonstrate capable negative chemotaxis: droplets respond polymer gradient through directional down gradient. The biocompatibility, motility partitioning abilities this offers new directions pursue research motion-related processes.

Language: Английский

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Classifying soft self-assembled materials via unsupervised machine learning of defects

Communications Chemistry, Journal Year: 2022, Volume and Issue: 5(1)

Published: July 14, 2022

Unlike molecular crystals, soft self-assembled fibers, micelles, vesicles, etc., exhibit a certain order in the arrangement of their constitutive monomers but also high structural dynamicity and variability. Defects disordered local domains that continuously form-and-repair structures impart to such materials unique adaptive dynamical properties, which make them, e.g., capable communicate with each other. However, objective criteria compare complex features classify supramolecular are non-trivial attain. Here we show data-driven workflow allowing us achieve this goal. Building on unsupervised clustering Smooth Overlap Atomic Position (SOAP) data obtained from equilibrium dynamics simulations, can variety assemblies via robust SOAP metric. This provides "defectometer" different types based ordered/disordered environments statistically emerge within them.

Language: Английский

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Acceleration of lipid reproduction by emergence of microscopic motion

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: May 19, 2021

Abstract Self-reproducing molecules abound in nature where they support growth and motion of living systems. In artificial settings, chemical reactions can also show complex kinetics reproduction, however integrating self-reproducing into larger systems remains a challenge towards achieving higher order functionality. Here, we that lipids initiate, sustain accelerate the movement octanol droplets water. Reciprocally, chemotactic increases rate lipid reproduction substantially. Reciprocal coupling between bond-forming chemistry droplet motility is thus established as an effect interplay molecular-scale events (the self-reproduction molecules) microscopic droplets). This molecular offers alternative means performing work catalysis micro-heterogeneous environments.

Language: Английский

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