Work

Ordering kinetics in two-dimensional hexagonal pattern of cylinder-forming PS- b -PMMA block copolymer thin films: Dependence on the segregation strength

Year: 2018

Type: article

Abstract: This paper reports the experimental determination of the growth exponents and activation enthalpies for the ordering process of standing cylinder-forming all-organic polystyrene-block-poly (methyl methacrylate) block copolymer (BCP) thin films as a function of the BCP degree of polymerization (N). The maximum growth exponent of 1/3 is observed for the BCP with the lowest N at the border of the order-disorder transition. Both the growth exponents and the activation enthalpies exponentially decrease with the BCP segregation strength (\ensuremath{\chi}N) following the same path of the diffusivity.

Source: Physical Review Materials

DOI: 10.1103/physrevmaterials.2.055605

Authors: Gabriele Seguini, Fabio Zanenga, Michele Laus, Michele Perego

Institutions: Institute for Microelectronics and Microsystems, Università degli Studi del Piemonte Orientale “Amedeo Avogadro”

Language: English

Topic: Block Copolymer Self-Assembly

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: Horizon 2020 Framework Programme

Award: G7111196126