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Directed self-assembly (DSA) is a type of directed assembly which utilizes block co-polymer morphology to create lines, space and hole patterns, facilitating for a more accurate control of the feature shapes. Then it uses surface interactions as well as polymer thermodynamics to finalize the formation of the final pattern shapes. [1]
Block copolymer solutions: Lodge's research group has maintained long-standing interest in the self-assembly of block copolymers in solutions. Studying the phase behavior of polystyrene-block-polyisoprene in solvents of varying selectivity, the concept of phase trajectories was introduced to explain the phase sequences observed as a function of ...
block copolymer: A copolymer that is a block polymer. In the constituent macromolecules of a block copolymer , adjacent blocks are constitutionally different, i.e. adjacent blocks comprise constitutional unit derived from different species of monomer or from the same species of monomer but with a different composition or sequence distribution ...
Solvent vapor annealing (SVA) is a widely used technique for controlling the morphology and ordering of block copolymer (BCP) films. [1] [2] [3] By controlling the block ratio (f = NA/N), spheres, cylinders, gyroids, and lamellae structures can be generated by forming a swollen and mobile layer of thin-film from added solvent vapor to facilitate the self-assembly of the polymer blocks. [4]
These kinetic effects, such as trapping in metastable states, slow coarsening kinetics, and pathway-dependent assembly, are often viewed as complications to be overcome in, for example, the formation of block copolymers. [12] [18] Amphiphile self-assembly is an essential bottom-up approach of fabricating advanced functional materials.
Self-assembly is a process in which a ... it was demonstrated that it was possible to use diblock copolymers with different block reactivities in order to ...
The research of Loos is focused on enzymatic polymerization, [8] [9] especially the biocatalytic synthesis of saccharides, [10] polyamides [11] and furan based polymers, [12] as well as the synthesis and self-assembly of block copolymers [13] [14] using supramolecular motifs [15] and containing ferroelectric blocks.
Level 1: Block copolymer unimers form amphiphilic triblock cylindrical micelles. Level 2: The cylindrical micelles form supermicelles via self-assembly around PFS cores. Level 3: The supermicelles are arranged in a pre-designed pattern using holography ( optical tweezers ).