Single Step Process for Self-Assembled Block Copolymer Patterns via in Situ Annealing during Spin-Casting

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• 作者：Hyunjung Jung ; Sanghoon Woo ; Youngson Choe ; Du Yeol Ryu ; June Huh ; Joona Bang
• 刊名：ACS Macro Letters
• 出版年：2015
• 出版时间：June 16, 2015
• 年：2015
• 卷：4
• 期：6
• 页码：656-660
• 全文大小：392K
• ISSN：2161-1653

文摘

We demonstrated a simple and time-efficient processing method for facilitating a microphase separation of block copolymers (BCPs) based on a single step of spin-casting with low volatile solvent and in situ annealing. Well-ordered lamellar patterns of poly(styrene-b-methyl methacrylate) BCP films having wide range of molecular weights (51鈥?35 kg/mol) were fabricated by a single 3 min process of spin-casting, even without the conventional pretreatment of substrate neutralization. The formation of this well-ordered lamellar structure is attributed to a synergetic effect between slow solvent evaporation and thermal energy that may provide an efficient cooling profile for the BCP film during the spin-casting process.