System and method for molecular-like hierarchical self_assembly of monolayers of mixtures of particles
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United States of America Patent
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Jul 9, 2019
Grant Date -
May 26, 2016
app pub date -
Nov 20, 2015
filing date -
Nov 21, 2014
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Abstract
This invention relates to a technique that uses an externally applied electric field to self-assemble monolayers of mixtures of particles into molecular-like hierarchical arrangements on fluid-liquid interfaces. The arrangements consist of composite particles which are arranged in a pattern. The structure of a composite particle depends on factors such as the relative sizes of the particles and their polarizabilities, and the electric field intensity. If the particles sizes differ by a factor of two or more, the composite particle has a larger particle at its core and several smaller particles form a ring around it. The number of particles in the ring and the spacing between the composite particles depend on their polarizabilities and the electric field intensity. Approximately same sized particles form chains in which positively and negatively polarized particles alternate, and when their polarizabilities are comparable they form tightly packed crystals.
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