Sponge mesoporous silica formation using disordered phospholipid bilayers as template

The Journal of Physical Chemistry. B
Anne GalarneauM Francesca Ottaviani

Abstract

Lecithin/dodecylamine/lactose mixtures in ethanol/aqueous media led to the formation of sponge mesoporous silica (SMS) materials by means of tetraethoxysilane (TEOS) as silica source. SMS materials show a "sponge-mesoporous" porosity with a pore diameter of about 5-6 nm, in accordance to the length of a lecithin bilayer. SMS synthesis was developed to create a new class of powerful biocatalysts able to efficiently encapsulate enzymes by adding a porosity control to the classical sol-gel synthesis and by using phospholipids and lactose as protecting agents for the enzymes. In the present study, the formation of SMS was investigated by using electron paramagnetic resonance (EPR) probes inserted inside phospholipid bilayers. The influence of progressive addition of each component (ethanol, dodecylamine, lactose, TEOS) on phospholipid bilayers was first examined; then, the time evolution of EPR spectra during SMS synthesis was studied. Parameters informative of mobility, structure, order, and polarity around the probes were extracted by computer analysis of the EPR line shape. The results were discussed on the basis of solids characterization by X-ray diffraction, nitrogen isotherm, transmission electron microscopy, and scanning el...Continue Reading

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Citations

Oct 29, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Alberto FattoriMaria Francesca Ottaviani
Oct 2, 2012·Journal of Liposome Research·Philippe GentineBenoît Frisch
Oct 23, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Giuseppe VitielloGerardino D'Errico
Jul 27, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Lai Truong PhuocAnne Galarneau
Jun 28, 2011·Journal of Liposome Research·Philippe GentineBenoît Frisch
Mar 10, 2017·Journal of Toxicology and Environmental Health. Part a·Michela CangiottiMaria Francesca Ottaviani
Feb 9, 2012·The Journal of Physical Chemistry. B·Liron Bitan-CherbakovskyNissim Garti
Aug 10, 2010·Chemical Reviews·Andrey A GurtovenkoIlpo Vattulainen

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