Web Release Date: May 20,
Evaporation-Induced Self-Assembly of Hybrid Bridged Silsesquioxane Film and Particulate Mesophases with Integral Organic Functionality
and
Contribution from the Sandia National Laboratories, Albuquerque, New Mexico 87185, Department of Chemical and Nuclear Engineering and UNM/NSF Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, New Mexico 87131
Received October 6, 1999
Abstract:
We report an evaporation-induced self-assembly procedure to prepare poly(bridged silsesquioxane)
thin-film and particulate mesophases that incorporate organic moieties (1-3) into periodic, mesostructured
frameworks as molecularly dispersed bridging ligands. Capacitance-voltage measurements along with a variety
of structural characterization procedures were performed to begin to elucidate structure-property relationships
of this new class of surfactant-templated mesophases. We observed a consistent trend of increasing modulus
and hardness and decreasing dielectric constant with substitution of the bridged silsesquioxane (
Si-(CH2)2-Si)
for siloxane (Si-O-Si) in the framework. This preliminary evidence suggests that the introduction of
integral organic groups into the frameworks of mesoporous materials can result in synergistic properties,
promising an unprecedented ability to tune properties and function.
Download the full text: PDF | HTML
