3D touchless multiorder reflection structural color sensing display. Academic Article uri icon


  • The development of a lightweight, low-power, user-interactive three-dimensional (3D) touchless display in which a human stimulus can be detected and simultaneously visualized in noncontact mode is of great interest. Here, we present a user-interactive 3D touchless sensing display based on multiorder reflection structural colors (SCs) of a thin, solid-state block copolymer (BCP) photonic crystal (PC). Full-visible-range SCs are developed in a BCP PC consisting of alternating lamellae, one of which contains a chemically cross-linked, interpenetrated hydrogel network. The absorption of a nonvolatile ionic liquid into the domains of the interpenetrated network allows for further manipulation of SC by using multiple-order photonic reflections, giving rise to unprecedented visible SCs arising from reflective color mixing. Furthermore, by using a hygroscopic ionic liquid ink, a printable 3D touchless interactive display is created where 3D position of a human finger is efficiently visualized in different SCs as a function of finger-to-display distance.

published proceedings

  • Sci Adv

altmetric score

  • 43.384

author list (cited authors)

  • Kang, H. S., Han, S. W., Park, C., Lee, S. W., Eoh, H., Baek, J., ... Park, C.

citation count

  • 39

complete list of authors

  • Kang, Han Sol||Han, Sang Won||Park, Chanho||Lee, Seung Won||Eoh, Hongkyu||Baek, Jonghyeok||Shin, Dong-Gap||Park, Tae Hyun||Huh, June||Lee, Hyungsuk||Kim, Dae-Eun||Ryu, Du Yeol||Thomas, Edwin L||Koh, Won-Gun||Park, Cheolmin

publication date

  • July 2020