Electrically Tunable Soft-Solid Block Copolymer Structural Color

被引：70
作者：
Park, Tae Joon [1 ]
Hwang, Sun Kak [1 ]
Park, Sungmin [2 ]
Cho, Sung Hwan [1 ]
Park, Tae Hyun [1 ]
Jeong, Beomjin [1 ]
Kang, Han Sol [1 ]
Ryu, Du Yeol [2 ]
Huh, June [3 ]
Thomas, Edwin L. [4 ]
Park, Cheolmin [1 ]
机构：
[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
[2] Yonsei Univ, Dept Biomol & Chem Engn, Seoul 120749, South Korea
[3] Korea Univ, Dept Chem & Biol Engn, Seoul 136713, South Korea
[4] Rice Univ, Dept Mat Sci & Nano Engn, Houston, TX 77005 USA
来源：
ACS NANO | 2015年 / 9卷 / 12期
关键词：
soft-solid structural colored film; flexible photonic crystals; block copolymers; electrically switchable structural color; low operation voltage; PHOTONIC CRYSTALS; DIBLOCK COPOLYMERS; GELS; FILMS; PIXELS; POLYMERS; SOLVENT; SENSORS; BANDGAP;
D O I：
10.1021/acsnano.5b05234
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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-polynner/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.
引用
收藏
页码：12158 / 12167
页数：10
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