INVESTIGADORES
ANGELOME Paula Cecilia
congresos y reuniones científicas
Título:
Mesoporous Hybrid and Nanocomposite Thin Films. Using Sol Gel Toolbox to create nanoconfined systems with localized chemical properties
Autor/es:
GALO J. A. A. SOLER-ILLIA; PAULA C. ANGELOMÉ; M. CECILIA FUERTES; ALEJANDRA CALVO; FEDERICO J. WILLIAMS; OMAR AZZARONI; ALEJANDRO WOLOSIUK
Reunión:
Conferencia; XV International Sol Gel Conference (Sol Gel09); 2009
Resumen:
Mesoporous oxide thin films (MOTF) derived from the combination of sol-gel
and self-assembly techniques present a wealth of potential applications in
advanced coatings, sensors, optoelectronic devices or catalysts.
Transparent, robust films with high surface area, a great variety of inorganic
frameworks, and pore systems with precisely controlled pore size and
symmetry are now routinely produced by the Evaporation Induced Self
Assembly (EISA) pathway.
MOTF constitute indeed a nanofacility, where the high control exerted on
all the features cited above permits to create chemical systems with confined
functions, either within the walls or the pores. The possibility of adding
organic groups to the surface, either as short dangling groups or brush
polymers permits to regulate molecule flux within the pore systems. Control
of chemical reactivity within pore systems permits to include nanoparticles,
imparting new optical and catalytic properties to the ensemble. In addition,
the formation of multilayer films made up of stacked MOTF permit to build
complex nanosystems presenting different chemical reactivity in one
dimension, and thus the possibility of precisely locating chemical functions or
nanospecies with a given property.
In this presentation, we will discuss relevant examples in which organic
functions (molecules, brush polymers) or metallic nanoparticles are included
within MOTF, leading to novel and tailorable optical or molecule/ion filtering
properties. This is possible thanks to a precise control of the formation and
surface modification of a mesoporous framework by using a wide palette of
sol-gel techniques.