Pattern Orientation

Abstract This article is a review of the chemical and physical nature of patternable block copolymers and their use as templates for functional nanostructures. The patternability of block copolymers, that is, the ability to make complex, arbitrarily shaped submicron structures in block copolymer films, results from both their ability to self-assemble into microdomains, the bottom-up approach, and the manipulation of these patterns by a variety of physical and chemical means including top-down lithographic techniques. Procedures for achieving long-range control of microdomain pattern orientation as well... 

Buschmann, F., Meunier, R., Rohnert, H., Sommerlad, P., and Stal, M. 1996. Pattern-Oriented Software Architecture A System of Patterns. Wiley. 

Wiegand J, Jeltsch F, Hanski I, Grimm V. 2003. Using pattern-oriented modeling for revealing hidden information a key for reconciling ecological theory and application. Oikos 100 209-222. 

The pattern, oriented vertically on the target plane, was sharp and bright so that at least 10 orders of diffraction could be seen with minimal darkening of the room. The size of the pattern was such that visual examination permitted 4 to 6 orders of minima to be pricked into index-card stock held against the target plane and conveniently measured with 10 cm dial calipers readable to 0.001 cm. 

Study of epitaxial growth by the LEED method is often quite clear-cut and uncomplicated by formation of unexpected structures. One simply observes development of a characteristic crystal plane of the deposit bulk structure, and this is usually quite obvious from simple inspection of the pattern. Orientation of the film on the substrate is usually easily evident also. In some cases, the overlayer is coherent with the substrate as a coincidence lattice producing complicated LEED patterns. Yet it is usually relatively straightforward to decipher such patterns, because spacings in the overlayer structure are often easily assigned from known X-ray spacings of the substance being deposited [see, for example, Bauer (95)]. 

The situation is different for [111] orientation when the firee-energy functional has anisotropic cubic terms leading to anisotropic quadratic terms in the evolution equation for the surface shape and the complex quadratic resonant interaction coefficient. In this case, the imaginary part of the resonant interaction coefficient depends on the surface-energy anisotropy coefficient, q, and the pattern orientation within the [111] plane (angle po). As one can see from... 

Polyester samples treated with oxygen plasma showed ripplelike patterns oriented in a direction perpendicular to the fiber axis. Polyester samples exposed to plasma for 60min (5 Pa, 20 W, Figure 3.8) had a much greater etching effect compared with polyester treated for only lOmin. The granular substances that developed only on the... 

Figure 14.25. Reconstructed SAXS patterns (oriented scattering) of two UDP MFC materials and their respective chord distribution functions. Fibril axis is vertical. The CDF function is presented in absolute values (both positive and negative faces in one image)...

Screen with traces at 0° and 45° illustrating the effect of pattern orientation. 

A Petri Net Pattern-Oriented Approach for the Design of Physical Protection Systems... 

Keywords Pattern Oriented Modelling, Model-Based Vulnerability Assessment, Generalized Stochastic Petri Nets, Physical Protection Systems Design. 

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