Printable and Rewritable Full Block Copolymer Structural Color |
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| Authors: | Han Sol Kang Jinseong Lee Suk Man Cho Tae Hyun Park Min Ju Kim Chanho Park Seung Won Lee Kang Lib Kim Du Yeol Ryu June Huh Edwin L. Thomas Cheolmin Park |
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| Affiliation: | 1. Department of Materials Science and Engineering, Yonsei University, Seodaemun‐gu, Seoul, Republic of Korea;2. Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, Republic of Korea;3. Department of Chemical and Biological Engineering, Korea University, Anam‐dong, Seongbuk‐gu, Seoul, Republic of Korea;4. Department of Materials Science and Nano Engineering, Rice University, Houston, TX, USA |
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| Abstract: | Structural colors (SCs) of photonic crystals (PCs) arise from selective constructive interference of incident light. Here, an ink‐jet printable and rewritable block copolymer (BCP) SC display is demonstrated, which can be quickly written and erased over 50 times with resolution nearly equivalent to that obtained with a commercial office ink‐jet printer. Moreover, the writing process employs an easily modified printer for position‐ and concentration‐controlled deposition of a single, colorless, water‐based ink containing a reversible crosslinking agent, ammonium persulfate. Deposition of the ink onto a self‐assembled BCP PC film comprising a 1D stack of alternating layers enables differential swelling of the written BCP film and produces a full‐colored SC display of characters and images. Furthermore, the information can be readily erased and the system can be reset by application of hydrogen bromide. Subsequently, new information can be rewritten, resulting in a chemically rewritable BCP SC display. |
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| Keywords: | ammonium persulfate block copolymers full‐colored photonic crystals ink‐jet printing printable structural color reversible crosslinking rewritable structural color |
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