响应性光子晶体.ppt

NANJING UNIVERSITY OF TECHNOLOGY Responsive Photonic Crystals Student ID : XX Reporter: XX Tutor: XX Date: Nor.8,2013 Contents Introduction Formation of Photonic Crystals General Strategies to Create Responsive Photonic Structures Stimuli-Responsive Photonic Crystals Application of Responsive Photonic Crystals Summary and Outlook Chem. Soc. Rev, [J], 2012,?41, 3297-3317 Introduction photonic crystals：periodic?optical?nanostructures different refractive index stimulus-responsive materials responsive photonic crystals (RPCs) Introduction Formation of Photonic Crystals traditional microfabrication photolithography etching techniques holographic lithography glancing-angle “spiral” deposition . . . Angewandte Chemie International Edition, [J], 2011, 50(7): 1492-1522. self-assembly electrodeposition layer-by-layer deposition gas phase deposition . . . Top-down Bottom-up General Strategies To Create Responsive Photonic Structures Change lattice constant Change interplanar spacing and sphere density Change effective refractive index Change relative orientation Introduce defects with responsive properties Apply external stimuli Angewandte Chemie International Edition, [J], 2011, 50(7): 1492-1522. Stimuli-Responsive Photonic Crystals Advanced Materials, [J], 2009, 21(18): 1801-1804. Thermoresponsive Photonic Crystals Fig1. Preparation of a DTPC Fig2. Schematic of DTPCs at different temperatures and in different pH buffer solutions Langmuir, [J], 2006, 22(3): 1365-1368. Mechanically Responsive Photonic Crystals Fig3. Elastic deformation of the colloidal crystal composite film. Fig5. Relationship between the peak positions and elongation of the silicone rubber sheet owing to stretching. Fig4. Changes in the structural color of the colloidal crystal film covering the silicone rubber sheet. Stimuli-Responsive Photonic Crystals Angewandte Chemie International Edition, [J], 2012, 5