Journal
ADVANCED MATERIALS
Volume 29, Issue 29, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201700084
Keywords
ammonium persulfate; block copolymers; full-colored photonic crystals; ink-jet printing; printable structural color; reversible crosslinking; rewritable structural color
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Funding
- Samsung Research Funding Center of Samsung Electronics [SRFC-MA1301-03]
- National Research Foundation of Korea [2014H1A2A1021571] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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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