title: Bioinspired Thermoresponsive Photonic Polymers with Hierarchical Structures and Their Unique Properties.
abstract: Thermoresponsive photonic materials having hierarchical structures are created by combining a template of Morpho butterfly wings with poly(N-isopropylacrylamide) (PNIPAM) through a chemical bonding and polymerization route. These materials show temperature-induced color tunability. Through reacting with both NIPAM monomers and the amino groups of chitosan in wing scales, glutaraldehyde workes as a bridge by creating chemical bonding between the biotemplate and the PNIPAM. The corresponding reflection peaks red-shift with increase in temperature-an opposite phenomenon to previous studies, demonstrating a thermoresponsive photonic property. This unique phenomenon is caused by the refractive index change due to the volume change of PNIPAM during the temperature rising. This work sets up an efficient strategy for the fabrication of stimuli-responsive photonic materials with hierarchical structures toward extensive applications in science and technology.
authors.affiliation: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Lu
authors.affiliation: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
authors.forename: Shenmin
authors.initials: S
authors.lastname: Zhu
authors.affiliation: Department of Engineering, University of South Australia, Mawson Lakes, SA5095, Australia.
authors.forename: Jun
authors.initials: J
authors.lastname: Ma
authors.affiliation: Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics Chinese Academy of Sciences, Shanghai, 201204, China.
authors.forename: Jinyou
authors.initials: J
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
authors.forename: Wanlin
authors.initials: W
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Pan
authors.affiliation: Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics Chinese Academy of Sciences, Shanghai, 201204, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
authors.forename: Wang
authors.initials: W
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
authors.forename: Di
authors.initials: D
authors.lastname: Zhang
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry; D005976:Glutaral / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature
chemical_list: D000180:Acrylic Resins; D011108:Polymers; C052970:poly-N-isopropylacrylamide; D048271:Chitosan; D005976:Glutaral
keywords: chemical bonding; hierarchical structures; photonic crystals; thermoresponsive polymers