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Type: Artigo de periódico
Title: On The Distinct Molecular Architectures Of Dipping- And Spray-lbl Films Containing Lipid Vesicles.
Author: Aoki, Pedro H B
Alessio, Priscila
Volpati, Diogo
Paulovich, Fernando V
Riul, Antonio
Oliveira, Osvaldo N
Constantino, Carlos J L
Abstract: 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.
Subject: Adsorption
Electrochemical Techniques
Lipid Bilayers
Microscopy, Atomic Force
Quaternary Ammonium Compounds
Spectrum Analysis, Raman
Information Visualization
Layer-by-layer Films
Molecular Architecture
Rights: fechado
Identifier DOI: 10.1016/j.msec.2014.04.067
Date Issue: 2014
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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