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CFM

Seminar

Two-Dimensional Colloidal Alloys

Buzza, M (University of Hull)
Monday 19 August 2013, 09:30-10:00

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Abstract

Co-authors: Adam Law (Max-Planck-Institut fuer Intelligente Systeme), Melodie Auriol (Ecole Nationale Superieure de Chimie de Rennes), Dean Smith (University of Hull), Tommy Horozov (University of Hull)

We study the self-assembly of mixed monolayers of hydrophobic and hydrophilic colloidal particles adsorbed at oil/water interfaces both experimentally and theoretically. Experimentally, we find that by tuning the interactions, composition and packing geometry of the mixed monolayer, a rich variety of two-dimensional super-lattice [1] and cluster [2] structures are formed which are stabilised by strong electrostatic interactions mediated through the oil phase. The 2D structures obtained are in excellent agreement with zero temperature lattice sum calculations [1-3], indicating that the self-assembly process can be effectively controlled for the creation of novel 2D structures.

[1] A.D. Law, D.M.A. Buzza, T.S. Horozov, Phys. Rev. Lett., 106, 128302 (2011) [2] A.D. Law, M. Auriol, D. Smith, T.S. Horozov, D.M.A. Buzza, Phys. Rev. Lett., 110, 138301 (2013) [3] A.D. Law, T.S. Horozov, D.M.A. Buzza, Soft Matter, 7, 8923 (2011)

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