Three‐dimensional Directed Assembly of Block Copolymers together with Two‐dimensional Square and Rectangular Nanolithography

• DOI: 10.1002/adma.201101813
• Publication Date: 2011-07-07T06:11:54Z
• Authors: Shengxiang Ji; Umang Nagpal; Wen Liao; Chi‐Chun Liu; Juan J. de Pablo; Paul F. Nealey
• Keywords: Materials Testing; Nanotechnology; Polymethyl Methacrylate; Polystyrenes; 01 natural sciences; Nanostructures; 0104 chemical sciences

Self-assembling sphere-forming block copolymers that normally adopt a hexagonal packing in thin films are directed to assemble on chemically patterned surfaces into their three-dimensional bulk-like body-centered cubic morphology; two-dimensional manufacturing-relevant patterns with square and rectangular symmetry can be derived from the films using molecular transfer printing at a resolution beyond the limits of current lithographic tools and materials.