Electrically Tunable Soft-Solid Block Copolymer Structural Color

Tae Joon Park; Sun Kak Hwang; Sungmin Park; Sung Hwan Cho; Tae Hyun Park; Beomjin Jeong; Han Sol Kang; Du Yeol Ryu; June Huh; Edwin L. Thomas; Cheolmin Park

doi:10.1021/acsnano.5b05234

Electrically Tunable Soft-Solid Block Copolymer Structural Color

Tae Joon Park, Sun Kak Hwang, Sungmin Park, Sung Hwan Cho, Tae Hyun Park, Beomjin Jeong, Han Sol Kang, Du Yeol Ryu, June Huh, Edwin L. Thomas, Cheolmin Park

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

60 Citations (Scopus)

Abstract

One-dimensional photonic crystals based on the periodic stacking of two different dielectric layers have been widely studied, but the fabrication of mechanically flexible polymer structural color (SC) films, with electro-active color switching, remains challenging. Here, we demonstrate free-standing electric field tunable ionic liquid (IL) swollen block copolymer (BCP) films. Placement of a polymer/ionic liquid film-reservoir adjacent to a self-assembled poly(styrene-block-quaternized 2-vinylpyridine) (PS-b-QP2VP) copolymer SC film allowed the development of red (R), green (G), and blue (B) full-color SC block copolymer films by swelling of the QP2VP domains by the ionic liquid associated with water molecules. The IL-polymer/BCP SC film is mechanically flexible with excellent color stability over several days at ambient conditions. The selective swelling of the QP2VP domains could be controlled by both the ratio of the IL to a polymer in the gel-like IL reservoir layer and by an applied voltage in the range of -3 to +6 V using a metal/IL reservoir/SC film/IL reservoir/metal capacitor type device.

Original language	English
Pages (from-to)	12158-12167
Number of pages	10
Journal	ACS Nano
Volume	9
Issue number	12
DOIs	https://doi.org/10.1021/acsnano.5b05234
Publication status	Published - 2015 Oct 27

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Publisher Copyright:
© 2015 American Chemical Society.

All Science Journal Classification (ASJC) codes

Materials Science(all)
Engineering(all)
Physics and Astronomy(all)

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10.1021/acsnano.5b05234

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title = "Electrically Tunable Soft-Solid Block Copolymer Structural Color",

abstract = "One-dimensional photonic crystals based on the periodic stacking of two different dielectric layers have been widely studied, but the fabrication of mechanically flexible polymer structural color (SC) films, with electro-active color switching, remains challenging. Here, we demonstrate free-standing electric field tunable ionic liquid (IL) swollen block copolymer (BCP) films. Placement of a polymer/ionic liquid film-reservoir adjacent to a self-assembled poly(styrene-block-quaternized 2-vinylpyridine) (PS-b-QP2VP) copolymer SC film allowed the development of red (R), green (G), and blue (B) full-color SC block copolymer films by swelling of the QP2VP domains by the ionic liquid associated with water molecules. The IL-polymer/BCP SC film is mechanically flexible with excellent color stability over several days at ambient conditions. The selective swelling of the QP2VP domains could be controlled by both the ratio of the IL to a polymer in the gel-like IL reservoir layer and by an applied voltage in the range of -3 to +6 V using a metal/IL reservoir/SC film/IL reservoir/metal capacitor type device.",

author = "Park, {Tae Joon} and Hwang, {Sun Kak} and Sungmin Park and Cho, {Sung Hwan} and Park, {Tae Hyun} and Beomjin Jeong and Kang, {Han Sol} and Ryu, {Du Yeol} and June Huh and Thomas, {Edwin L.} and Cheolmin Park",

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doi = "10.1021/acsnano.5b05234",

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T1 - Electrically Tunable Soft-Solid Block Copolymer Structural Color

AU - Park, Tae Joon

AU - Hwang, Sun Kak

AU - Park, Sungmin

AU - Cho, Sung Hwan

AU - Park, Tae Hyun

AU - Jeong, Beomjin

AU - Kang, Han Sol

AU - Ryu, Du Yeol

AU - Huh, June

AU - Thomas, Edwin L.

AU - Park, Cheolmin

PY - 2015/10/27

Y1 - 2015/10/27

N2 - One-dimensional photonic crystals based on the periodic stacking of two different dielectric layers have been widely studied, but the fabrication of mechanically flexible polymer structural color (SC) films, with electro-active color switching, remains challenging. Here, we demonstrate free-standing electric field tunable ionic liquid (IL) swollen block copolymer (BCP) films. Placement of a polymer/ionic liquid film-reservoir adjacent to a self-assembled poly(styrene-block-quaternized 2-vinylpyridine) (PS-b-QP2VP) copolymer SC film allowed the development of red (R), green (G), and blue (B) full-color SC block copolymer films by swelling of the QP2VP domains by the ionic liquid associated with water molecules. The IL-polymer/BCP SC film is mechanically flexible with excellent color stability over several days at ambient conditions. The selective swelling of the QP2VP domains could be controlled by both the ratio of the IL to a polymer in the gel-like IL reservoir layer and by an applied voltage in the range of -3 to +6 V using a metal/IL reservoir/SC film/IL reservoir/metal capacitor type device.

AB - One-dimensional photonic crystals based on the periodic stacking of two different dielectric layers have been widely studied, but the fabrication of mechanically flexible polymer structural color (SC) films, with electro-active color switching, remains challenging. Here, we demonstrate free-standing electric field tunable ionic liquid (IL) swollen block copolymer (BCP) films. Placement of a polymer/ionic liquid film-reservoir adjacent to a self-assembled poly(styrene-block-quaternized 2-vinylpyridine) (PS-b-QP2VP) copolymer SC film allowed the development of red (R), green (G), and blue (B) full-color SC block copolymer films by swelling of the QP2VP domains by the ionic liquid associated with water molecules. The IL-polymer/BCP SC film is mechanically flexible with excellent color stability over several days at ambient conditions. The selective swelling of the QP2VP domains could be controlled by both the ratio of the IL to a polymer in the gel-like IL reservoir layer and by an applied voltage in the range of -3 to +6 V using a metal/IL reservoir/SC film/IL reservoir/metal capacitor type device.

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Electrically Tunable Soft-Solid Block Copolymer Structural Color

Abstract

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