Results 21 to 30 of about 314 (126)
Microswimmer Propulsion by Two Steadily Rotating Helical Flagella [PDF]
Micromachines, 2019 Many theoretical studies of bacterial locomotion adopt a simple model for the organism consisting of a spheroidal cell body and a single corkscrew-shaped flagellum that rotates to propel the body forward. Motivated by experimental observations of a group of magnetotactic bacterial strains, we extended the model by considering two flagella attached to ...
Henry Shum
exaly +4 more sources
Swimming force characterizations of multistaged bi-helical microswimmer and 3D vortex trap manipulation [PDF]
Microelectronic Engineering, 2021 Abstract Vortex trap manipulation of microscopic objects in three-dimensions by helical microswimmers has a great potential towards non-contact biological cell manipulation or microassembly. However, in the current state-of-the-art, it has been limited in 2D manipulation due to the conflicting characteristics of optimizing the trapping force and ...
Dominique Decanini, Gilgueng Hwang
exaly +2 more sources
Artificial helical microswimmers with mastigoneme-inspired appendages [PDF]
Biomicrofluidics, 2013 A smooth flagellum moves in the opposite direction of the propagation of flagellar waves. Conversely, a flagellum covered with appendages perpendicular to the main flagellum, called mastigonemes, moves in the same direction as the propagation of flagellar waves.
Soichiro, Tottori, Bradley J, Nelson
openaire +4 more sources
Dynamics of Artificial Helical Microswimmers Under Confinement [PDF]
ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, 2018 Understanding trajectories of natural and artificial helical swimmers under confinement is important in biology and for controlled swimming in potential medical applications. Swimmers follow helical or straight trajectories depending on whether the helical tail is pushing or pulling the swimmer.
Çaldağ, Hakan Osman +1 more
openaire +2 more sources
Shaping Function: Polymeric 3D Systems With Unconventional Geometries for Biomedical Applications. [PDF]
SmallParticle shape is a key design parameter governing biological interactions. Advances in fabrication enable precise control over anisotropy and compartmentalization, allowing modulation of cellular uptake, transport, and biodistribution, ultimately enhancing therapeutic performance. ABSTRACT Polymer geometry is a primary determinant of physical behavior
Perfeito FG, Oliveira MB, Mano JF.
europepmc +2 more sources
Velocity Control with Gravity Compensation for Magnetic Helical Microswimmers [PDF]
Advanced Robotics, 2011 Magnetic helical microswimmers, which swim using a method inspired by the propulsion of bacterial flagella, are promising for use as untethered micromanipulators and as medical microrobots. Man-made devices are typically heavier than their fluid environment and consequently sink due to their own weight.
Arthur W. Mahoney +3 more
openaire +1 more source
Shapes enhancing the propulsion of multiflagellated helical microswimmers
, 2021 19 pages, 10 ...
Berti, Luca +5 more
openaire +2 more sources
Modeling and Swimming Property Characterizations of Scaled-Up Helical Microswimmers [PDF]
IEEE/ASME Transactions on Mechatronics, 2014 Micro- and nanorobots capable of controlled propulsion at low Reynolds number are foreseen to change many aspects of medicine by enabling targeted diagnosis and therapy, and minimally invasive surgery. Several kinds of helical swimmers with different heads actuated by a rotating magnetic field have been proposed in prior works.
Xu, Tiantian +3 more
openaire +2 more sources
3D Printed Enzymatically Biodegradable Soft Helical Microswimmers [PDF]
Advanced Functional Materials, 2018 AbstractMobile micro‐ and nanorobots are proposed for future biomedical applications, such as diagnostics and targeted delivery. For their translation to clinical practice, biocompatibility and biodegradability of micro‐ and nanorobots are required aspects.
Xiaopu Wang +8 more
openaire +3 more sources
Bioinspired Helical Microswimmers Based on Vascular Plants
Nano Letters, 2013 Plant-based bioinspired magnetically propelled helical microswimmers are described. The helical microstructures are derived from spiral water-conducting vessels of different plants, harnessing the intrinsic biological structures of nature. Geometric variables of the spiral vessels, such as the helix diameter and pitch, can be controlled by mechanical ...
Gao, Wei +6 more
openaire +3 more sources