Open AccessArranging matter by magnetic nanoparticle assemblers
Author(s) -
Benjamin B. Yellen,
Ondřej Hovorka,
Gary D. Friedman
Publication year - 2005
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.0500409102
Subject(s) - magnetic nanoparticles , nanoparticle , particle (ecology) , substrate (aquarium) , nanotechnology , dispersion (optics) , materials science , magnetization , magnetic particle inspection , trajectory , biological system , chemical physics , physics , magnetic field , optics , biology , quantum mechanics , astronomy , ecology
We introduce a method for transporting colloidal particles, large molecules, cells, and other materials across surfaces and for assembling them into highly regular patterns. In this method, nonmagnetic materials are manipulated by a fluid dispersion of magnetic nanoparticles. Manipulation of materials is guided by a program of magnetic information stored in a substrate. Dynamic control over the motion of nonmagnetic particles can be achieved by reprogramming the substrate magnetization on the fly. The unexpectedly large degree of control over particle motion can be used to manipulate large ensembles of particles in parallel, potentially with local control over particle trajectory.