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Construction of Hydrogen‐Bond‐Assisted Crack‐Free Photonic Crystal Films and Their Performance on Fluorescence Enhancement Effect
Author(s) -
Zhu Zhijie,
Zhang Jing,
Wang CaiFeng,
Chen Su
Publication year - 2017
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201700013
Subject(s) - materials science , fluorescence , methyl methacrylate , acrylic acid , hydrogen bond , photonic crystal , polyurethane , methacrylate , optoelectronics , polymer , nanotechnology , composite material , copolymer , optics , molecule , organic chemistry , chemistry , physics
The ability to fabricate high‐quality colloidal photonic crystal (CPC) films in large areas is critical in many applications, ranging from flexible displays, security devices to optical enhancement. Herein, a large‐scaled CPC film with crack‐free structure and uniform optical performance is prepared via a hydrogen‐bond‐assisted method. The crack‐free CPC film is ascribed to the intermolecular hydrogen bonds between carboxyl (COOH) moieties of poly(styrene‐methyl methacrylate acrylic acid) microspheres and isocyanate (NCO) moieties of polyurethane. Furthermore, the as‐prepared CPC film is applied as a Bragg reflection mirror for fluorescence enhancement. It is demonstrated that a fourfold enhancement of fluorescence signal is achieved when the stopband of CPCs overlaps with the emission wavelength of quantum dots. This simple method of preparing large‐area and crack‐free CPC film is promising for developing efficient optical devices.