Charge-induced gelation of microparticles

Details Charge-induced gelation of microparticles Charge-induced gelation of microparticles

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005njph....7..227k&link_type=abstract

New Journal of Physics, Volume 7, Issue 1, pp. 227 (2005).

Physics

13

Scientific paper

A highly efficient coagulation process of microparticles was discovered during experiments that were carried out on the International Space Station. Charged microspheres injected into a low pressure neutral gas environment form mm-sized aggregates, provided the initial number density is high enough. The coagulation occurred at a rate ~104 105 times faster than that usually observed with uncharged grains. Theoretical estimates show that this process is so fast that it cannot even be explained by a coagulation process with charge enhanced cross-section. The observations can, however, be described by a 'gelation phase transition'. We summarize the salient measurements, outline the theoretical description and show their compatibility.

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