Zobrazeno 1 - 10
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pro vyhledávání: '"Uspal, William E."'
Autor:
Popescu, Mihail N., Nicola, Bogdan Adrian, Uspal, William E., Domínguez, Alvaro, Gáspár, Szilveszter
Patches of catalyst imprinted on supporting walls induce motion of the fluid around them once they are supplied with the chemical species (``fuel'') that are converted by the catalytic chemical reaction. While the functioning of such chemically activ
Externí odkaz:
http://arxiv.org/abs/2411.12107
Many biological microswimmers are capable of chemotaxis, i.e., they can sense an ambient chemical gradient and adjust their mechanism of motility to move towards or away from the source of the gradient. Synthetic active colloids endowed with chemotac
Externí odkaz:
http://arxiv.org/abs/2406.10568
Autor:
Poehnl, Ruben, Uspal, William E.
The "squirmer model" is a classical hydrodynamic model for the motion of interfacially-driven microswimmers, such as self-phoretic colloids or volvocine green algae. To date, most studies using the squirmer model have considered spherical particles w
Externí odkaz:
http://arxiv.org/abs/2306.01168
Autor:
Georgiev, Rumen N., Toscano, Sara O., Uspal, William E., Bet, Bram, Samin, Sela, van Roij, Rene, Eral, Huseyin Burak
Comprehensive understanding of particle motion in microfluidic devices is essential to unlock novel technologies for shape-based separation and sorting of microparticles like microplastics, cells and crystal polymorphs. Such particles interact hydrod
Externí odkaz:
http://arxiv.org/abs/2003.02806
Autor:
Das, Sayan, Jalilvand, Zohreh, Popescu, Mihail N., Uspal, William E., Dietrich, Siegfried, Kretzschmar, Ilona
Surface bound catalytic chemical reactions self-propel chemically active Janus particles. In the vicinity of boundaries, these particles exhibit rich behavior, such as the occurrence of wall-bound steady states of "sliding". Most active particles ten
Externí odkaz:
http://arxiv.org/abs/2002.03028
Publikováno v:
J. Condens. Matter Phys., 32(16), 164001 (2020)
We study, by means of an exact analytical solution, the motion of a spheroidal, axisymmetric squirmer in an unbounded fluid, as well as the low Reynolds number hydrodynamic flow associated to it. In contrast to the case of a spherical squirmer --- fo
Externí odkaz:
http://arxiv.org/abs/1910.11503
Publikováno v:
Science Advances 4, eaao1755 (2018)
For natural microswimmers, the interplay of swimming activity and external flow can promote robust motion, e.g. propulsion against ("upstream rheotaxis") or perpendicular to the direction of flow. These effects are generally attributed to their compl
Externí odkaz:
http://arxiv.org/abs/1706.06817
Autor:
Simmchen, Juliane, Katuri, Jaideep, Uspal, William E., Popescu, Mihail N., Tasinkevych, Mykola, Sanchez, Samuel
Publikováno v:
Nature Communications 7:10598 (2016)
Achieving control over the directionality of active colloids is essential for their use in practical applications such as cargo carriers in microfluidic devices. So far, guidance of spherical Janus colloids was mainly realized using specially enginee
Externí odkaz:
http://arxiv.org/abs/1602.04094
Akademický článek
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Autor:
Leith, Jason S., Tafvizi, Anahita, Huang, Fang, Uspal, William E., Doyle, Patrick S., Fersht, Alan R., Mirny, Leonid A., van Oijen, Antoine M.
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America, 2012 Oct 01. 109(41), 16552-16557.
Externí odkaz:
https://www.jstor.org/stable/41763386
