Nanostructured anti-corrosion coating, structure including same and method for anti-corrosion protection of a substrate

The invention relates to a nanostructured anti-corrosion coating containing polyelectrolytes, including: at least one main compartment including a multilayer (1) of polyelectrolyte(s), doped with at least one anti-corrosion agent (4), and an upper multilayer (2a) acting as a barrier against the diffusion of the doping agents and having an upper surface corresponding to the upper surface of the main compartment; and optionally one or more secondary compartments each including a multilayer (8, 11) of polyelectrolyte(s), doped with at least one functional agent different from an anti-corrosion agent, and an upper multilayer (2b; 2c) acting as a barrier against the diffusion of the doping agents and having an upper surface corresponding to the upper surface of the secondary compartment. The invention also relates to a structure including a metal substrate and such a coating, to the use thereof in the field of aeronautics or aerospace, and to a method for making the same

Structural and charge-transport properties of a liquid-crystalline alpha,omega-disubstituted thiophene derivative: A joint experimental and theoretical study.

We present a joint experimental and theoretical study of the structural and charge-transport properties of a liquid-crystalline alpha,omega-disubstituted oligothiophene derivative for application ill organic field-effect transistors. The structural properties of the crystalline and smectic phases are investigated by atomic force microscopy, X-ray reflectometry, and X-ray diffraction. To complement these data, molecular mechanics calculations together with the simulation of X-ray diffraction spectra were performed to determine the relative positions of the molecules in the unit cell. The electrical characteristics of field-effect transistors based oil the oligothiophene derivative were measured and compared in the crystalline and smectic phases. Although the silanation of the SiO2 gate dielectric promoted a marked improvement in the char-c-carrier mobilities in the crystalline Phase, the expected suppression of grain boundaries ill the liquid-crystalline phase was not unambiguously evidenced. The experimental results were further complemented by a detailed theoretical analysis of the electronic couplings governing the charge-transport properties oil the molecular scale

Structural and Charge-Transport Properties of a Liquid-Crystalline r,ω-Disubstituted Thiophene Derivative: A Joint Experimental and Theoretical Study Vincent Lemaur

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