Artículos de revistas
On the distinct molecular architectures of dipping- and spray-LbL films containing lipid vesicles
Fecha
2014-08-01Registro en:
Materials Science and Engineering: C, Lausanne, v.41, p.363-371, 2014
0928-4931
10.1016/j.msec.2014.04.067
Autor
Aoki, Pedro H. B.
Alessio, Priscila
Volpati, Diogo
Paulovich, Fernando Vieira
Riul Junior, Antonio
Oliveira Junior, Osvaldo Novais de
Constantino, Carlos J. L.
Institución
Resumen
The introduction of spraying procedures to fabricate layer-by-layer (LbL) films has brought new possibilities for the control of molecular architectures and for making the LbL technique compliant with industrial processes. In this study we show that significantly distinct architectures are produced for dipping and spray-LbL films of the same components, which included DODAB/DPPG vesicles. The films differed notably in their thickness and stratified nature. The electrical response of the two types of films to aqueous solutions containing erythrosin was also different. With multidimensional projections we showed that the impedance for the DODAB/DPPG spray-LbL film is more sensitive to changes in concentration, being therefore more promising as sensing units. Furthermore, with surface-enhanced Raman scattering (SERS) we could ascribe the high sensitivity of the LbL films to adsorption of erythrosin.