Micropattern formation by molecular migration via UV-induced dehydration of block copolymers

Kenji Okada, Yasuaki Tokudome, Rie Makiura, Kristina Konstas, Luca Malfatti, Plinio Innocenzi, Hiroki Ogawa, Toshiji Kanaya, Paolo Falcaro, Masahide Takahashi

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

A novel UV lithographic technique for the patterning of the block copolymer (Pluronic) thin films is developed. The present method is based on UV-induced water affinity changes in block copolymer films. By water vapor post-treatment of the film, a difference in water content is established between UV illuminated and unilluminated sections, which can induce an osmotic pressure at the interface. This osmotic pressure drives the migration of Pluronic molecules, resulting in formation of patterns on the block copolymer films. Remarkably, this patterning method requires neither initiators nor polymerizable moieties which are essential for a conventional photolithographic approach. Additionally, the etching process is bypassed, eliminating the use of destructive acids or organic solvents and making this an environmentally friendly patterning protocol. It is reported that Pluronic is photo-responsive to UV exposure, which causes the dehydration of the PEO-PPO-PEO backbone.

Originalspracheenglisch
Seiten (von - bis)2801-2809
Seitenumfang9
FachzeitschriftAdvanced functional materials
Jahrgang24
Ausgabenummer19
DOIs
PublikationsstatusVeröffentlicht - 21 Mai 2014
Extern publiziertJa

Schlagwörter

    ASJC Scopus subject areas

    • !!Biomaterials
    • !!Electrochemistry
    • !!Condensed Matter Physics
    • !!Electronic, Optical and Magnetic Materials

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  • Dieses zitieren

    Okada, K., Tokudome, Y., Makiura, R., Konstas, K., Malfatti, L., Innocenzi, P., ... Takahashi, M. (2014). Micropattern formation by molecular migration via UV-induced dehydration of block copolymers. Advanced functional materials, 24(19), 2801-2809. https://doi.org/10.1002/adfm.201302812