Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Republic of Korea.
Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 120-749, Republic of Korea.
Adv Mater. 2017 Aug;29(29). doi: 10.1002/adma.201700084. Epub 2017 May 26.
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.
结构色（SCs）源于光子晶体（PCs）的选择性建设性干涉。在此，展示了一种可喷墨打印和可重写的嵌段共聚物（BCP）SC 显示器，它可以在 50 次以上的快速写入和擦除，分辨率几乎与商用办公喷墨打印机相当。此外，该写入过程采用了一种易于修改的打印机，用于位置和浓度控制沉积单一的、无色的、含可逆交联剂过硫酸铵的水性油墨。将油墨沉积到由交替层组成的自组装 BCP PC 薄膜上，使写入的 BCP 薄膜发生差异化溶胀，并产生全彩色的字符和图像 SC 显示器。此外，信息可以很容易地擦除，系统可以通过施加氢溴酸来重置。随后，可以重写新信息，从而实现化学可重写的 BCP SC 显示器。
