Packing patterns of silica nanoparticles on surfaces of armored polystyrene latex particles

Sara Fortuna (Avtor), Catheline A. L. Colard (Avtor), Alessandro Troisi (Avtor), Stefan Antonius Franciscus Bon (Avtor)

Povzetek

Fascinating packing patterns of identical spherical and discotic objects on curved surfaces occur readily in nature and science. Examples include C60 fullerenes,(1, 2)13-atom cuboctahedral metal clusters,(3) and S-layer proteins on outer cell membranes.(4) Numerous situations with surface-arranged objects of variable size also exist, such as the lenses on insect eyes, biomineralized shells on coccolithophorids,(5) and solid-stabilized emulsion droplets(6) and bubbles.(7) The influence of size variations on these packing patterns, however, is studied sparsely. Here we investigate the packing of nanosized silica particles on the surface of polystyrene latex particles fabricated by Pickering miniemulsion polymerization of submicrometer-sized armored monomer droplets. We are able to rationalize the experimental morphology and the nearest-neighbor distribution with the help of Monte Carlo simulations. We show that broadening of the nanoparticle size distribution has pronounced effects on the self-assembled equilibrium packing structures, with original 12-point dislocations or grain-boundary scars gradually fading out.

Ključne besede

packing patterns;silica;Monte Carlo simulations;order;disorder;transition;armored particles;nanoparticles;Pickering emulsion;

Podatki

Jezik:	Angleški jezik
Leto izida:	2009
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UNG - Univerza v Novi Gorici
UDK:	54
COBISS:	4529915
ISSN:	0743-7463
Št. ogledov:	4011
Št. prenosov:	0
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

URN:	URN:SI:UNG
Vrsta dela (COBISS):	Delo ni kategorizirano
Strani:	str. 12399-12403
Letnik:	ǂVol. ǂ25
Zvezek:	ǂno. ǂ21
Čas izdaje:	2009
DOI:	10.1021/la9010289
ID:	9175936