Grazing incident small angle x-ray scattering study of polymer thin films with embedded ordered nanometer cells

Hideaki Yokoyama, Cedric Dutriez, Lei Li, Taichi Nemoto, Kenji Sugiyama, Sono Sasaki, Hiroyasu Masunaga, Masaki Takata, Hiroshi Okuda

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Analysis of nanostructures is of increasing importance with advances of nanotechnology. Embedded nanostructures in thin films in particular are of recent interest. Grazing incident small angle x-ray scattering (GISAXS) has been recognized to be a powerful method to probe such embedded nanostructures; however, quantitative analysis of scattering pattern is not always trivial due to complex refraction and reflection at surface and interfaces. We prepared nanocellular thin films using block copolymer template with carbon dioxide (C O2); CO2 "bubbles" were formed in the CO2 -philic block domains. Such nanocellular structures were analyzed by GISAXS and simulated using distorted wave Born approximation (DWBA). Unlike traditional transmission x-ray scattering, GISAXS requires a careful choice of incident angle to analyze the form factor of scatters embedded in a thin film. Nevertheless, the GISAXS measurements under optimized geometry with quantitative calculations using DWBA revealed that the nanocells are spherical and aligned in a single layer of hexagonal lattice and are surrounded by CO2 -philic block domains.

Original languageEnglish
Article number014904
JournalJournal of Chemical Physics
Volume127
Issue number1
DOIs
Publication statusPublished - 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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