Control of alignment

Control of alignment of n-conjugated polymers on the substrate is important for excellent performance of the polymer in electronic devices (e.g., higher mobility of carrier in field-effect transistors [134,136]). Details of the molecular structure and molecular assembly of PAEs will be discussed in other chapters. 

Relatively few reports exist at this time describing media that are both switchable and erasable. The general strategy has been to record the information in the form of a reversible surface effect, either on an alignment layer or on the inner surfaces of a PDLC. In this situation, the control of alignment of an LC can be switched between surface and electric field effects, such that the on state alignment is provided by the surface control and the off state alignment is provided by the electric field. 

The methods involving control of pretilt angle magnitude are similar to those involving control of alignment direction and the viewing angle dependency of the LC materials within one pixel is mutually compensated. 

Control and alignment of segmented-mirror telescopes matrices, modes, and error propagation Chanan, G., MacMartin, D., Nelson, J., Mast, T., 2004, Applied Optics 43, 1223... 

A. Pelzer, S. Ramakrishna, and T. Seideman, Optimal control of molecular alignment in dissipative media, J. Chem. Phys. in press. 

If the elliptical parameterization shall be used for automatic alignment of scattering patterns, control of ellipse rotation and displacement are important. Rotation is controlled by subtraction of a constant from v. A displaced center is readily considered by subtraction on the left side of Eqs. (10.6) and (10.7). 

Okamoto et al. [48] first conducted an elongation test on PP-based nanocomposites in the molten state at constant Hencky strain rate, so using elongation flow optorheo-metry [49]. They also attempted to control the alignment of the dispersed silicate... 

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