TY - JOUR
T1 - On the distinct molecular architectures of dipping- and spray-LbL films containing lipid vesicles
AU - Aoki, Pedro H.B.
AU - Alessio, Priscila
AU - Volpati, Diogo
AU - Paulovich, Fernando V.
AU - Riul, Antonio
AU - Oliveira, Osvaldo N.
AU - Constantino, Carlos J.L.
N1 - Funding Information:
This work was supported by FAPESP, CNPq and the nBioNet network from CAPES (Brazil).
PY - 2014/8/1
Y1 - 2014/8/1
N2 - 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.
AB - 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.
KW - Erythrosin
KW - Information visualization
KW - Layer-by-layer films
KW - Molecular architecture
KW - Sensing
UR - http://www.scopus.com/inward/record.url?scp=84901252195&partnerID=8YFLogxK
U2 - 10.1016/j.msec.2014.04.067
DO - 10.1016/j.msec.2014.04.067
M3 - Article
C2 - 24907772
AN - SCOPUS:84901252195
SN - 0928-4931
VL - 41
SP - 363
EP - 371
JO - Materials Science and Engineering C
JF - Materials Science and Engineering C
ER -