منابع مشابه
Flocking ferromagnetic colloids
Assemblages of microscopic colloidal particles exhibit fascinating collective motion when energized by electric or magnetic fields. The behaviors range from coherent vortical motion to phase separation and dynamic self-assembly. Although colloidal systems are relatively simple, understanding their collective response, especially under out-of-equilibrium conditions, remains elusive. We report on...
متن کاملMesoscopic monodisperse ferromagnetic colloids enable magnetically controlled photonic crystals.
We report here the first synthesis of mesoscopic, monodisperse particles which contain nanoscopic inclusions of ferromagnetic cobalt ferrites. These monodisperse ferromagnetic composite particles readily self-assemble into magnetically responsive photonic crystals that efficiently Bragg diffract incident light. Magnetic fields can be used to control the photonic crystal orientation and, thus, t...
متن کاملPolymer-coated ferromagnetic colloids from well-defined macromolecular surfactants and assembly into nanoparticle chains.
A novel synthetic route to polymer-coated ferromagnetic colloids of metallic cobalt has been developed. Well-defined end-functional polystyrenes were synthesized using controlled radical polymerization and used as surfactants in the thermolysis of dicobaltoctacarbonyl to afford uniform ferromagnetic nanoparticles. The presence of the polymer shell enabled prolonged colloidal stability of disper...
متن کاملFlocking Behavior
Flocking is the phenomenon in which self-propelled individuals, using only limited environmental information and simple rules, organize into an ordered motion. This ordering even occurs at two dimensions where ordering is not possible equilibrium systems. This paper will explain the biological and physical motivation for studying flocking, and the computational, theoretical, and experimental ef...
متن کاملFlocking in
climate was rare heavy rainfall in western Queensland. And a result has been enormous flocks of the popular pet bird, budgerigars. The birds have had a breeding boom as a result of the grasses that have seeded after the rains. “I have been here since 1983 and never seen anything like it, Ann Britton, a resident of Boulia, told Queensland’s Courier and Mail. “My father, who has travelled extensi...
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ژورنال
عنوان ژورنال: Science Advances
سال: 2017
ISSN: 2375-2548
DOI: 10.1126/sciadv.1601469