- https://www.sincrotronalba.es/es/actualidad/eventos/eventos-publicos-de-alba/formation-and-ordering-of-nano-crystals-at-liquid-liquid-and-liquid-air-interfaces
- Formation and ordering of nano-crystals at liquid-liquid and liquid-air interfaces
- 2016-03-18T12:00:00+01:00
- 2016-03-18T13:00:00+01:00
- Prof. Milan K. Sanyal, Professor and former director, Saha Institute of Nuclear Physics (India)
- Qué
- events
- Cuándo
-
Mar 18, 2016
de 12:00 a 13:00 (Europe/Madrid / UTC100) - Dónde
- Sincrotrón ALBA - Marie Curie Room
- Nombre
- Inma Hernández
- Teléfono de contacto
- +34 93 592 43 89
- Enlace del evento
- Página web externa
- Agregar evento al calendario
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iCal
Formation and ordering of nanomaterials in liquid-air and in liquid-liquid interfaces are fascinating phenomena and can be probed in-situ very efficiently with synchrotron X-ray scattering techniques. We shall discuss here two of our recent results as examples to illustrate this subject.
The first example is the counter intuitive reversible crystallisation of two-dimensional monolayer of Trisilanolisobutyl Polyhedral Oligomeric SilSesquioxane (TBPOSS) on water surface. Amphiphilic TBPOSS form rugged monolayers and Grazing Incidence X-ray Scattering (GIXS) measurements reveal that the in-plane inter-particle correlation peaks, characteristic of two-dimensional system, observed before transition is replaced by intense localized spots after transition.
The other example is the formation CuS single-crystals at the water–toluene interface through an interfacial reaction. Nano-crystallites of CuS form within a few minutes at the interface as the reagents are brought from the organic (upper) and aqueous (lower) layers to the interface, then crystallization of CuS proceeds over a few hours only by reorganization. The interface confinement and passivation by organics is critical here in the formation of single crystals having sizes of 6 and 200 nm along the normal and in-plane directions of the liquid–liquid interface.
