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Synthesis of Light‐Diffracting Assemblies from Microspheres and Nanoparticles in Droplets on a Superhydrophobic Surface
Author(s) -
Rastogi Vinayak,
Melle Sonia,
Calderón Oscar G.,
García Antonio A.,
Marquez Manuel,
Velev Orlin D.
Publication year - 2008
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200703008
Subject(s) - materials science , dispersity , microsphere , nanoparticle , template , nanotechnology , suspension (topology) , particle (ecology) , colloidal gold , colloid , aqueous suspension , structural coloration , aqueous solution , chemical engineering , surface (topology) , polymer chemistry , photonic crystal , organic chemistry , oceanography , chemistry , mathematics , optoelectronics , homotopy , geology , pure mathematics , engineering , geometry
Aqueous suspension droplets of monodisperse latex or latex and gold nanoparticles mixtures assume spherical shape on superhydrophobic substrates. The drying sessile droplets serve as macroscopic templates for assembling microspheres into closed‐packed structures. Upon illumination, the supraparticles display discrete colored rings because of the periodic arrangement of latex particles in the surface layer. The physical origin of the colored patterns is explained in detail.