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Orientation Control in Diblock Copolymer Thin Films Placed on Ordered Nanoparticle Monolayers

Authors
Publisher
서울대학교 대학원
Publication Date
Keywords
  • 블록공중합체
  • Orientation
  • 자기조립
  • Self-Assembly
  • 나노입자
  • Block Copolymer
  • 단일층
  • Nanoparticle
  • 박막
  • Langmuir-Blodgett
  • 배향
  • Thin Film

Abstract

We have investigated orientation of microphase-separated domains of diblock copolymer (diBCP) thin films deposited on ordered nanoparticle (NP) monolayers. The ordered NP monolayers were prepared on silicon substrates with the Langmuir-Blodgett (LB) deposition technique. The perpendicular domain orientation of polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymer thin films with respect to the substrate surface is favored on the ordered NP monolayers due to the roughness induced from the NP monolayers which can exert elastic deformation on the parallel-oriented microdomains, suppressing the substrate-induced parallel orientation. The effects of NP size as well as BCP film thickness on the orientation of BCP microdomains were systematically studied with AFM and Grazing Incidence Small-Angle X-ray Scattering (GISAXS). The rectification of perpendicularly oriented BCP microdomains and underlying NP lattices was analyzed with SEM for thin BCP films (less than 100 nm in thickness). We observed the persisted perpendicular orientation of BCP microdomains on NP vacant sites up to the width of NP vacant sites less than 290 nm (~ 11.6 Lo). * Note: The text above is the abstract of the thesis. You can use the full-text by clicking the "Link" (URL) of item record and the viewer program will be installed automatically. In case of having problem with the viewer program installation, please download it manually using this url http://pdfdrm.snu.ac.kr/snudrm/download/PDFReaderSetup.exe

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