Preparation and Characterization of ATO/PS Bilayer Films with Superior Hydrophilicity

The c-oriented La1.8Sr0.2CuO4 and La1.9Sr0.1CuO4 bilayer films were deposited on (001) SrTiO3 single-crystal substrates by using the pulsed laser deposition technique. The effects of deposition parameters on the quality of thin films were investigated. The crystal structures and surface morphologies were characterized by means of XRD and SEM, and the results showed that an as-prepared film deposited with the optimized parameters has high quality. Then La1.8Sr0.2CuO4/La1.9Sr0.1CuO4 bilayers structure was prepared using the optimized parameters for each corresponding layer, and the electrical transport properties were measured. Interesting rectifying properties were observed at both room and low temperatures, and the rectifying ratio at low temperature was found to be much higher than that at room temperature.

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Development and characterization of bilayer films of FucoPol and chitosan

Carbohydrate Polymers ◽

10.1016/j.carbpol.2016.03.089 ◽

2016 ◽

Vol 147 ◽

pp. 8-15 ◽

Cited By ~ 44

Author(s):

Ana R.V. Ferreira ◽

Cristiana A.V. Torres ◽

Filomena Freitas ◽

Chantal Sevrin ◽

Christian Grandfils ◽

...

Keyword(s):

Bilayer Films

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Formulation and characterization of bilayer films based on Brea gum and Pectin

BRAZILIAN JOURNAL OF FOOD TECHNOLOGY ◽

10.1590/1981-6723.21317 ◽

2018 ◽

Vol 21 (0) ◽

Author(s):

Aníbal Marcelo Slavutsky ◽

Jimena Elizabeth Gamboni ◽

María Alejandra Bertuzzi

Keyword(s):

Water Vapour ◽

Single Layer ◽

Controlled Drug Release ◽

Water Vapour Permeability ◽

Bilayer Film ◽

Vapour Permeability ◽

Bilayer Films ◽

Film Forming ◽

Differential Properties

Abstract The formulation of bilayer films is a strategy aimed at combining the advantages and properties of different film-forming materials. Bilayer films based on pectin and brea gum were formulated and their functional properties studied and compared with those presented by single layer films of each component. The micrographs and surface properties confirmed that the bilayer films can maintain their identity and prevent delamination. The mechanical properties of the films depended on the characteristics of the polymers and their interactions, and the bilayer films showed prevalence of the brea gum properties. The brea gum films showed high solubility that influenced the bilayer film solubility. The water vapour permeability of the bilayer films was dependent on the material that was exposed to the side where desorption occurred. The bilayer films presented lower water vapour permeability than the brea gum films but higher than that of pectin films of similar thicknesses. The differential properties of each layer of bilayer films make them potentially interesting for controlled drug release.

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