Block Copolymer Self-Assembly

Epitaxial assembly of block-copolymer films (see Figure) onto chemically nanopatterned substrates results in arrays of nanoscopic domains that are defect-free, oriented, and registered with the underlying substrate. The range of dimensions of features (or periodicity of structures) that can be patterned with perfectio…

Chemically patterned surfaces comprised of polymer mats and brushes of well-defined chemistry were fabricated at the length scale of 10 nm. A key concept is the integration of new materials, cross-linked polymer mats, with traditional lithographic processing. Resist was patterned on top of cross-linked polystyrene mat…

• MUSTAFA SERDAR ÖNSES

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• MUSTAFA SERDAR ÖNSES

The synergy of self- and directed-assembly processes and lithography provides intriguing avenues to fabricate translationally ordered nanoparticle arrangements, but currently lacks the robustness necessary to deliver complex spatial organization. Here, we demonstrate that interparticle spacing and local orientation of…

• MUSTAFA SERDAR ÖNSES

We have performed multicanonical simulations of hydrophobic-hydrophilic heteropolymers with two simple effective, coarse-grained off-lattice models to study the influence of specific interactions in the models on conformational transitions of selected sequences with 20 monomers. Another aspect of the investigation was…

The exchange dynamics of chains between micelles of diblock copolymers in dilute solution in a selective solvent has been studied by a semianalytical approach. A close inspection of dynamic Monte Carlo simulation trajectories showed that there are mainly two types of exchange mechanisms, chain insertion/expulsion and…

The effect of chain architecture on the morphological and tensile properties of series of multigraft copolymers, with regularly spaced tri-, tetra-, and hexafunctional junction points, was investigated using transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and tensile testing. The materials…

• ENGİN BURGAZ

Multilayer coatings of colloidal particle substrates (see figure) formed entirely from block copolymer micelles are demonstrated. Such multilayer coatings provide a highly functional organized coating that may have application across a wide range of technology areas, and provide a coating mechanism for controlled load…

• VURAL BÜTÜN

A novel complex nanostructure, produced by the directed assembly of a block copolymer thin film on chemically patterned surfaces, is presented. The new nanostructure, which consists of cylinders oriented alternately parallel and perpendicular to the surface (see figure, a result of self-consistent field calculations),…

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• EROL YILDIRIM

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• EROL YILDIRIM
• MİNE YURTSEVER

Fundamental understanding of the self-assembly of domains in block copolymers (BCPs) and capabilities in control of these processes are important for their use as nanoscale templates in various applications. This paper focuses on the self-assembly of spin-cast and printed poly(styrene-block-methyl methacrylate) BCPs o…

• MUSTAFA SERDAR ÖNSES