Release Time:2019-11-06  Hits:

Indexed by: Journal Papers

Date of Publication: 2019-06-26

Journal: ACS APPLIED MATERIALS & INTERFACES

Included Journals: PubMed、SCIE

Volume: 11

Issue: 25

Page Number: 22777-22785

ISSN: 1944-8244

Key Words: large-area; photonic crystal film; water rewritable; structural color; thermal assisted air-liquid interface self assembly

Abstract: Compared with traditional paper, water rewritable photonic crystal (PC) paper is an environmentally friendly and low resource-consuming material for information storage. Although, recently reported PC papers have high-quality structure color showing promising prospect, the paper size, that is within several centimeters, still limits turning it from potential to reality. Here, we present a new water rewritable PC film as large as the A4 size (210 x 300 mm(2)) with a high-quality structure color. The material is prepared by thermal assisted self-assembly on the air-liquid interface. To fix such a large-area self-assembled PC film, we partially deform and coalesce the self-assembled nanoparticles, which have low glass transition temperature. This process causes the film to be transparent and structural colorless but still keeps the inner 3D-ordered structure. Then, utilizing the hydrophilic nature of the assembled block, the film can be switched to a structural color state by touching water. Diverse brilliant structural colors appear with different assembled particle (poly(butyl methacrylate-co-methylmethacrylate-co-butyl acrylate-co-diacetone acrylamide) named as PBMBD) sizes. The transparency-structural color transition can be performed multiple times reversibly in all or specific regions of the film. It provides a new solution for future applications of rewriteable PC paper.