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Rewritable Photonic Paper with Hygroscopic Salt Solution as Ink
Author(s) -
Ge Jianping,
Goebl James,
He Le,
Lu Zhenda,
Yin Yadong
Publication year - 2009
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200901562
Subject(s) - materials science , photopolymer , inkwell , photonics , structural coloration , polymer , photonic crystal , salt (chemistry) , matrix (chemical analysis) , nanotechnology , optoelectronics , composite material , organic chemistry , chemistry , polymerization
Flexible photonic paper is fabricated through the instant magnetic assembly of Fe 3 O 4 @SiO 2 colloids, followed by a rapid photopolymerization to fix the photonic structures inside the PEGDA matrix. Solutions of LiCl, MgCl 2 , or CaCl 2 are used as inks to print durable letters and patterns with color contrast based on the local swelling of the polymer matrix. The photonic paper is rewritable and benign to the environment as the ink marks can simply be removed by washing with water.