Thickness-dependent ordering of perpendicularly oriented lamellae in PS-b-PMMA thin films

Sang Woo Kim, Eunhye Kim, Hoyeon Lee, Brian C. Berry, Ho Cheol Kim, Du Yeol Ryu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Thickness-dependent ordering of lamellar microdomains in symmetric polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) thin films was studied using scanning force microscopy (SFM), scanning electron microscopy (SEM), and grazing incidence small-angle X-ray scattering (GISAXS). The extent of perpendicular orientation for the lamellar microdomains on a neutral substrate was assessed at various film thicknesses around a lamella period (1Lo) by varying the molecular weight of PS-b-PMMAs. The lateral ordering of perpendicularly oriented lamellae was evaluated with the defect distance (D) and orientational correlation length (ξ) to extract the power law relationships with film thicknesses. The lateral ordering of higher-molecular-weight (>74 kg/mol) PS-b-PMMA films is enhanced by increasing film thickness, whereas in a low-molecular-weight (50 kg/mol) PS-b-PMMA, it is enhanced by decreasing film thickness below 1Lo.

Original languageEnglish
Pages (from-to)63-69
Number of pages7
JournalPolymer
Volume74
DOIs
Publication statusPublished - 2015 Aug 14

Fingerprint

Polystyrenes
Polymethyl Methacrylate
Polymethyl methacrylates
Film thickness
Thin films
Molecular weight
X ray scattering
Atomic force microscopy
Defects
Scanning electron microscopy
Substrates

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Kim, Sang Woo ; Kim, Eunhye ; Lee, Hoyeon ; Berry, Brian C. ; Kim, Ho Cheol ; Ryu, Du Yeol. / Thickness-dependent ordering of perpendicularly oriented lamellae in PS-b-PMMA thin films. In: Polymer. 2015 ; Vol. 74. pp. 63-69.
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Thickness-dependent ordering of perpendicularly oriented lamellae in PS-b-PMMA thin films. / Kim, Sang Woo; Kim, Eunhye; Lee, Hoyeon; Berry, Brian C.; Kim, Ho Cheol; Ryu, Du Yeol.

In: Polymer, Vol. 74, 14.08.2015, p. 63-69.

Research output: Contribution to journalArticle

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AU - Ryu, Du Yeol

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