Vacuum-Driven Orientation of Nanostructured Diblock Copolymer Thin Films

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Aum Sagar Panda
  • Yi-Chien Lee
  • Chen-Jung Hung
  • Kang-Ping Liu
  • Cheng-Yen Chang
  • Gkreti-Maria Manesi
  • Apostolos Avgeropoulos
  • Fan-Gang Tseng
  • Rong-Ming Ho

Detail(s)

Original languageEnglish
Pages (from-to)12686–12694
Journal / PublicationACS Nano
Volume16
Issue number8
Online published29 Jul 2022
Publication statusPublished - 23 Aug 2022

Abstract

This work aims to demonstrate a facile method for the controlled orientation of nanostructures of block copolymer (BCP) thin films. A simple diblock copolymer system, polystyrene-block-polydimethylsiloxane (PS-b-PDMS), is chosen to demonstrate vacuum-driven orientation for solving the notorious low-surface-energy problem of silicon-based BCP nanopatterning. By taking advantage of the pressure dependence of the surface tension of polymeric materials, a neutral air surface for the PS-b-PDMS thin film can be formed under a high vacuum degree (∼10−4 Pa), allowing the formation of the film-spanning perpendicular cylinders and lamellae upon thermal annealing. In contrast to perpendicular lamellae, a long-range lateral order for forming perpendicular cylinders can be efficiently achieved through the self-alignment mechanism for induced ordering from the top and bottom of the free-standing thin film.

Research Area(s)

  • block copolymers, nanostructures, self-assembly, surface tension, thin films, vacuum

Citation Format(s)

Vacuum-Driven Orientation of Nanostructured Diblock Copolymer Thin Films. / Panda, Aum Sagar; Lee, Yi-Chien; Hung, Chen-Jung; Liu, Kang-Ping; Chang, Cheng-Yen; Manesi, Gkreti-Maria; Avgeropoulos, Apostolos; Tseng, Fan-Gang; Chen, Fu-Rong; Ho, Rong-Ming.

In: ACS Nano, Vol. 16, No. 8, 23.08.2022, p. 12686–12694.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review