Dipolar organization and magnetic actuation of flagella-like nanoparticle assemblies

Benkoski, Jason J.; Breidenich, Jennifer; Uy, O. Manuel; Hayes, Allen; Deacon, Ryan M.; Land, H. Bruce; Spicer, J. W. M.; Keng, Pei Yuin; Pyun, Jeffrey

doi:10.1039/c0jm04014b

Cited by 47 publications

(55 citation statements)

References 78 publications

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“…This swimmer is a good candidate for forming the basis of future micro-carriers, a claim supported as much by its simplicity of design as by the number of experimental micro-swimmer systems that are based on linearly connected beads. 1,[3][4][5]7,12 A simpler variant of this design, the three-sphere swimmer introduced by Naja and Golestanian, 32 has already proved its immense utility by establishing many basic properties of micro-swimming in spite of sparseness of body elements. [33][34][35][36] Starting with a force-based description 37 and considering only ellipsoids of revolution for the beads in our swimmer, we here determine the optimal forcing parameters as well as the ellipsoidal aspect ratios that lead to the fastest and the most efficient swimming.…”

mentioning

confidence: 99%

Forces and shapes as determinants of micro-swimming: effect on synchronisation and the utilisation of drag

Pande

Smith

2015

Soft Matter

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mentioning

confidence: 99%

Forces and shapes as determinants of micro-swimming: effect on synchronisation and the utilisation of drag

Pande

Smith

2015

Soft Matter

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“…[17]) or by intrinsic self-propulsion mechanisms [18], opening the possibility for lane formation and related dynamical phenomena. Examples of swimmers with anisotropic (e.g., magnetic) interactions have been studied in [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Lane formation in a driven attractive fluid

2016

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We investigate non-equilibrium lane formation in a generic model of a fluid with attractive interactions, that is, a two-dimensional Lennard-Jones (LJ) fluid composed of two particle species driven in opposite directions. Performing Brownian Dynamics (BD) simulations for a wide range of parameters, supplemented by a stability analysis based on dynamical density functional theory (DDFT), we identify generic features of lane formation in presence of attraction, including structural properties. In fact, we find a variety of states (as compared to purely repulsive systems), as well as a close relation between laning and long wavelength instabilities of the homogeneous phase such as demixing and condensation.

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“…The study of microswimmer motion has gained a lot of impetus recently, driven in equal measure by advances in experimental technology, [1][2][3][4][5][6][7][8][9][10][11][12] numerical methods, [13][14][15][16][17] and theoretical modelling. [18][19][20][21][22][23][24] The increased attention has served to highlight the dazzling variety of ways in which nature accomplishes the difficult task of achieving nonreversibility of motion, as is required for propagation at low Reynolds numbers, [25] despite relative sparseness of degrees of motile freedom.…”

Section: Introductionmentioning

confidence: 99%

Effect of body deformability on microswimming

et al. 2017

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In this work we consider the following question: given a mechanical microswimming mechanism, does increased deformability of the swimmer body hinder or promote the motility of the swimmer? To answer this we study a microswimmer model composed of deformable beads connected with springs. We determine the velocity of the swimmer analytically, starting from the forces driving the motion and assuming that the oscillations in the effective radii of the beads are known and are much smaller than the radii themselves. We find that to the lowest order, only the driving frequency mode of the surface oscillations contributes to the swimming velocity, and that this velocity may both rise and fall with the deformability of the beads depending on the spring constant. To test these results, we run immersed boundary lattice Boltzmann simulations of the swimmer, and show that they reproduce both the velocity-promoting and velocity-hindering effects of bead deformability correctly in the predicted parameter ranges. Our results mean that for a general swimmer, its elasticity determines whether passive deformations of the swimmer body, induced by the fluid flow, aid or oppose the motion.

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Dipolar organization and magnetic actuation of flagella-like nanoparticle assemblies

Cited by 47 publications

References 78 publications

Forces and shapes as determinants of micro-swimming: effect on synchronisation and the utilisation of drag

Forces and shapes as determinants of micro-swimming: effect on synchronisation and the utilisation of drag

Lane formation in a driven attractive fluid

Effect of body deformability on microswimming

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