Self-consistent field theory of twist grain boundaries in block copolymers
نویسندگان
چکیده
Because the lamellae of block copolymers lack any internal order, their grain boundaries are simpler than those between grains of crystalline solids. While the latter are combinations of five different independent boundaries, the former can be decomposed into only two independent ones. In the kink grain boundary, the normals perpendicular to the lamellae of the two grains define a plane which is perpen-
منابع مشابه
Stability analysis of twist grain boundaries in lamellar phases of block copolymers
Twist grain boundaries are widely observed in lamellar phases of block copolymers. A mesoscopic model of the copolymer is used to obtain stationary configurations that include a twist grain boundary, and to analyze their stability against long wavelength perturbations. The analysis presented is valid in the weak segregation regime, and includes direct numerical solution of the governing equatio...
متن کاملOrdering kinetics of lamella-forming block copolymers under the guidance of various external fields studied by dynamic self-consistent field theory.
Self-consistent field theory with a dynamic extension is exploited to investigate the kinetics of the lamellar formation of symmetric block copolymers under the direction of external fields. In particular, three types of directed self-assembly methods - a permanent field for chemo-epitaxy, a dynamic field for zone annealing and an integrated permanent/dynamic field - are examined. For the chemo...
متن کاملBenchmarking a Self-Consistent Field Theory for Small Amphiphilic Molecules
A minimalist self-consistent field theory for small amphiphilic molecules is presented. The equations for this model are less involved than those for block copolymers and are easily implemented computationally. A new convergence technique based on a variant of Anderson mixing is also presented which allows the equations to be solved more rapidly than block copolymer self-consistent field theory...
متن کاملSelf-assembly of rod-coil block copolymers.
We present a self-consistent field theory model for the self-assembly behavior of rod-coil block copolymers. The orientational interactions between the rods were modeled through a Maier-Saupe interaction, while the enthalpic interactions between rods and coils were modeled through a standard Flory-Huggins approach. We outline a "real-space" numerical approach to solve the self-consistent field ...
متن کاملSelf-consistent field theory simulations of block copolymer assembly on a sphere.
Recently there has been a strong interest in the area of defect formation in ordered structures on curved surfaces. Here we explore the closely related topic of self-assembly in thin block copolymer melt films confined to the surface of a sphere. Our study is based on a self-consistent field theory (SCFT) model of block copolymers that is numerically simulated by spectral collocation with a sph...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2002