Colloidal Assembly on Magnetically Vibrated Stripes

by: Pietro Tierno, Thomas M Fischer, Tom H Johansen, Francesc Sagués

Physical Review Letters, Vol. 100, No. 14. (2008)

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Abstract

We investigate the collective organization of paramagnetic colloidal particles externally driven above the periodic stripes of a uniaxial ferrimagnetic garnet film. An external field modulation induces vibration of the stripe walls and produces random motion of the particles. Defects in the stripe pattern break the symmetry of the potential and favor particle nucleation into large clusters above a critical density. Mismatch between particle size and pattern wavelength generates assemblies with different morphological order. At even higher field strengths, repulsive dipolar interactions between the particles induce cluster melting. We propose a novel approach to generate and externally control a variety of colloidal assemblies.

@article{citeulike:2766831, abstract = {We investigate the collective organization of paramagnetic colloidal particles externally driven above the periodic stripes of a uniaxial ferrimagnetic garnet film. An external field modulation induces vibration of the stripe walls and produces random motion of the particles. Defects in the stripe pattern break the symmetry of the potential and favor particle nucleation into large clusters above a critical density. Mismatch between particle size and pattern wavelength generates assemblies with different morphological order. At even higher field strengths, repulsive dipolar interactions between the particles induce cluster melting. We propose a novel approach to generate and externally control a variety of colloidal assemblies.}, author = {Tierno, Pietro and Fischer, Thomas M. and Johansen, Tom H. and Sagu\'es, Francesc }, citeulike-article-id = {2766831}, doi = {10.1103/PhysRevLett.100.148304}, journal = {Physical Review Letters}, keywords = {clusters, colloids, magnetic}, number = {14}, posted-at = {2008-05-07 16:36:04}, priority = {2}, publisher = {APS}, title = {Colloidal Assembly on Magnetically Vibrated Stripes}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000100000014148304000001\&idtype=cvips\&gifs=yes}, volume = {100}, year = {2008} }

RIS record

TY - JOUR ID - citeulike:2766831 TI - Colloidal Assembly on Magnetically Vibrated Stripes JF - Physical Review Letters VL - 100 IS - 14 PB - APS N2 - We investigate the collective organization of paramagnetic colloidal particles externally driven above the periodic stripes of a uniaxial ferrimagnetic garnet film. An external field modulation induces vibration of the stripe walls and produces random motion of the particles. Defects in the stripe pattern break the symmetry of the potential and favor particle nucleation into large clusters above a critical density. Mismatch between particle size and pattern wavelength generates assemblies with different morphological order. At even higher field strengths, repulsive dipolar interactions between the particles induce cluster melting. We propose a novel approach to generate and externally control a variety of colloidal assemblies. KW - clusters KW - colloids KW - magnetic AU - Tierno, Pietro AU - Fischer, Thomas AU - Johansen, Tom AU - Sagu\'es, Francesc PY - 2008/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000100000014148304000001&idtype=cvips&gifs=yes ER -

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