Boundaries can steer active Janus spheres
نویسندگان
چکیده
The advent of autonomous self-propulsion has instigated research towards making colloidal machines that can deliver mechanical work in the form of transport, and other functions such as sensing and cleaning. While much progress has been made in the last 10 years on various mechanisms to generate self-propulsion, the ability to steer self-propelled colloidal devices has so far been much more limited. A critical barrier in increasing the impact of such motors is in directing their motion against the Brownian rotation, which randomizes particle orientations. In this context, here we report directed motion of a specific class of catalytic motors when moving in close proximity to solid surfaces. This is achieved through active quenching of their Brownian rotation by constraining it in a rotational well, caused not by equilibrium, but by hydrodynamic effects. We demonstrate how combining these geometric constraints can be utilized to steer these active colloids along arbitrary trajectories.
منابع مشابه
Experimental Observation of Flow Fields Around Active Janus Spheres
Andrew I. Campbell, Stephen J. Ebbens, ∗ Pierre Illien, 3, 4 and Ramin Golestanian † Department of Chemical and Biological Engineering, University of Sheffield Mappin Street, Sheffield S1 3JD, UK Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford OX1 3NP, UK Max Planck Institute for the Physics of Complex Systems, Nothnitzer Str. 8, 01187 Dresden, Germany ESPCI Paris, U...
متن کاملSupplementary Material Orientationally Glassy Crystals of Janus Spheres
Orientationally Glassy Crystals of Janus Spheres Shan Jiang, Jing Yan,, Jonathan K. Whitmer, Stephen M. Anthony, Erik Luijten, and Steve Granick Departments of Materials Science and Engineering, Physics, and Chemistry University of Illinois, Urbana, IL 61801, USA Department of Materials Science and Engineering and Department of Engineering Sciences and Applied Mathematics, Northwestern Universi...
متن کاملOne-Pot Synthesis of Amphiphilic Polymeric Janus Particles and Their Self-Assembly into Supermicelles with a Narrow Size DistributionThe National Science Foundation of China (NSFC) (Project Nos. 20574014 and 20528405) is acknowledged for supporting this research
There is increasing interest in the preparation of Janus particles owing to their potential for application in a number of fields, such as the development of microrheological probes, optical biosensors, functional surfactants, and electronic devices. Janus particles can also be used to fabricate complex superstructures that would not be accessible from uniformly functionalized particles. Microf...
متن کاملKinetics of Janus Spheres
, 199 (2011); 331 Science et al. Qian Chen Supracolloidal Reaction Kinetics of Janus Spheres This copy is for your personal, non-commercial use only. clicking here. colleagues, clients, or customers by , you can order high-quality copies for your If you wish to distribute this article to others here. following the guidelines can be obtained by Permission to republish or repurpose articles or p...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره 6 شماره
صفحات -
تاریخ انتشار 2015