Optical Reflection from Unforbidden Diffraction of Block Copolymer Templated Gyroid Films

Seungyun Jo; Taesuk Jun; Hui Il Jeon; Seunggi Seo; Hyungjun Kim; Seungwoo Lee; Du Yeol Ryu

doi:10.1021/acsmacrolett.1c00520

Optical Reflection from Unforbidden Diffraction of Block Copolymer Templated Gyroid Films

Seungyun Jo, Taesuk Jun, Hui Il Jeon, Seunggi Seo, Hyungjun Kim, Seungwoo Lee, Du Yeol Ryu

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

We present material substitutions and optical characterization of block copolymer (BCP)-templated gyroid structures that are obtained from a volume-asymmetric polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA). In addition to the structural analyses reported earlier, we elucidate the optical responses to the nonaffine gyroid planes, in which the PMMA channels are complexed with Al₂O₃ by sequential infiltration synthesis and the organic components are further eliminated to produce an inorganic air–Al₂O₃ gyroid film. Grazing-incidence small-angle X-ray scattering measurements show that three-dimensional gyroid lattices are retained in both in-plane and out-of-plane directions through these material substitution processes. Our BCP-templated gyroid films respond to the middle UV wavelength from 200 to 300 nm, and peculiar optical reflectance peaks correlate with the unforbidden {110} diffraction spots. Together with the red- and blue-shifts of the reflectance peaks by the component substitutions, the air–Al₂O₃ gyroid structure reveals the high-amplitude spectrum due to the large refractive-index difference between channel and matrix.

Original language	English
Pages (from-to)	1609-1615
Number of pages	7
Journal	ACS Macro Letters
Volume	10
Issue number	12
DOIs	https://doi.org/10.1021/acsmacrolett.1c00520
Publication status	Published - 2021 Dec 21

Bibliographical note

Funding Information:
GISAXS measurements were performed at the 4C and 9A beamlines in Pohang Accelerator Laboratory, Korea. This research was supported by Samsung Research Funding & Incubation Center of Samsung Electronics under Project Number SRFC-MA1801-04.

Publisher Copyright:
© 2021 American Chemical Society

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/acsmacrolett.1c00520

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title = "Optical Reflection from Unforbidden Diffraction of Block Copolymer Templated Gyroid Films",

abstract = "We present material substitutions and optical characterization of block copolymer (BCP)-templated gyroid structures that are obtained from a volume-asymmetric polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA). In addition to the structural analyses reported earlier, we elucidate the optical responses to the nonaffine gyroid planes, in which the PMMA channels are complexed with Al2O3 by sequential infiltration synthesis and the organic components are further eliminated to produce an inorganic air–Al2O3 gyroid film. Grazing-incidence small-angle X-ray scattering measurements show that three-dimensional gyroid lattices are retained in both in-plane and out-of-plane directions through these material substitution processes. Our BCP-templated gyroid films respond to the middle UV wavelength from 200 to 300 nm, and peculiar optical reflectance peaks correlate with the unforbidden {110} diffraction spots. Together with the red- and blue-shifts of the reflectance peaks by the component substitutions, the air–Al2O3 gyroid structure reveals the high-amplitude spectrum due to the large refractive-index difference between channel and matrix.",

author = "Seungyun Jo and Taesuk Jun and Jeon, {Hui Il} and Seunggi Seo and Hyungjun Kim and Seungwoo Lee and Ryu, {Du Yeol}",

note = "Funding Information: GISAXS measurements were performed at the 4C and 9A beamlines in Pohang Accelerator Laboratory, Korea. This research was supported by Samsung Research Funding & Incubation Center of Samsung Electronics under Project Number SRFC-MA1801-04. Publisher Copyright: {\textcopyright} 2021 American Chemical Society",

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AU - Kim, Hyungjun

AU - Lee, Seungwoo

AU - Ryu, Du Yeol

N1 - Funding Information: GISAXS measurements were performed at the 4C and 9A beamlines in Pohang Accelerator Laboratory, Korea. This research was supported by Samsung Research Funding & Incubation Center of Samsung Electronics under Project Number SRFC-MA1801-04. Publisher Copyright: © 2021 American Chemical Society

PY - 2021/12/21

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N2 - We present material substitutions and optical characterization of block copolymer (BCP)-templated gyroid structures that are obtained from a volume-asymmetric polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA). In addition to the structural analyses reported earlier, we elucidate the optical responses to the nonaffine gyroid planes, in which the PMMA channels are complexed with Al2O3 by sequential infiltration synthesis and the organic components are further eliminated to produce an inorganic air–Al2O3 gyroid film. Grazing-incidence small-angle X-ray scattering measurements show that three-dimensional gyroid lattices are retained in both in-plane and out-of-plane directions through these material substitution processes. Our BCP-templated gyroid films respond to the middle UV wavelength from 200 to 300 nm, and peculiar optical reflectance peaks correlate with the unforbidden {110} diffraction spots. Together with the red- and blue-shifts of the reflectance peaks by the component substitutions, the air–Al2O3 gyroid structure reveals the high-amplitude spectrum due to the large refractive-index difference between channel and matrix.

AB - We present material substitutions and optical characterization of block copolymer (BCP)-templated gyroid structures that are obtained from a volume-asymmetric polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA). In addition to the structural analyses reported earlier, we elucidate the optical responses to the nonaffine gyroid planes, in which the PMMA channels are complexed with Al2O3 by sequential infiltration synthesis and the organic components are further eliminated to produce an inorganic air–Al2O3 gyroid film. Grazing-incidence small-angle X-ray scattering measurements show that three-dimensional gyroid lattices are retained in both in-plane and out-of-plane directions through these material substitution processes. Our BCP-templated gyroid films respond to the middle UV wavelength from 200 to 300 nm, and peculiar optical reflectance peaks correlate with the unforbidden {110} diffraction spots. Together with the red- and blue-shifts of the reflectance peaks by the component substitutions, the air–Al2O3 gyroid structure reveals the high-amplitude spectrum due to the large refractive-index difference between channel and matrix.

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Optical Reflection from Unforbidden Diffraction of Block Copolymer Templated Gyroid Films

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