响应性光子晶体

self-assembly
electrodeposition layer-by-layer deposition gas phase deposition ...
Angewandte Chemie International Edition, [J], 2011, 50(7): 1492-1522.
NANJING UNIVERSITY OF TECHNOLOGY
Responsive Photonic Crystals
Student ID : XX Reporter: XX Tutor: XX Date: Nor.8,2013
Contents
Introduction
Formation of Photonic Crystals
Fig4. Changes in the structural color of the colloidal crystal film covering the silicone rubber sheet.
Fig5. Relationship between the peak positions and elongation of the silicone rubber sheet owing to stretching.
Fig9. c) of the cell. The cross-linker concentration in this sample was 10 mol%.
Angewandte Chemie International Edition, [J], 2009, 121(5): 961-965.
Stimuli-Responsive Photonic Crystals
Fig12. Reversible colour changes of the TCPC hydrogel supraballs corresponding to relative humidities of 25%, 60%, 75%, 90% and 100%.
Journal of Materials Chemistry C, [J], 2013, 1(31): 4685-4690.
General Strategies to Create Responsive Photonic
Structures Stimuli-Responsive Photonic Crystals Application of Responsive Photonic Crystals Summary and Outlook
Langmuir, [J], 2006, 22(3): 1365-1368.
Stimuli-Responsive Photonic Crystals
Chemically Responsive Photonic Crystals
Fig6. a) Fabrication of a 2D PS particle array by the needle tip flow technique. b) Photograph of 580 nm PS 2D array on the water surface in a glass dish 19 cm in diameter. 580 nm diameter PS 2D crystal arrays transferred onto c) flat glass, d) a plastic sheet, and e) a curved glass. SEM images of 2D arrays of f) 580 nm, g) 235 nm, h) 1 mm, and i) 2 mm PS particles. j) Fabrication of a 2D array on a flat substrate coated with a thin layer of water.
Angewandte Chemie International Edition, [J], 2011, 50(7): 1492-1522.
Stimuli-Responsive Photonic Crystals
Thermoresponsive Photonic Crystals
Fig1. Preparation of a DTPC Fig2. Schematic of DTPCs at different temperatures and in different pH buffer solutions
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
Advanced Materials, [J], 2008, 20(18): 3485-3491.
Application of Responsive Photonic Crystals
Structural Color Printing
Fig14. Schematic of the production of high-resolution multiple structural colours with a single material.
responsive photonic crystals (RPCs)
Formation of Photonic Crystals
Top-down
Bottom-up
traditional microfabrication
photolithography
etching techniques holographic lithography glancing-angle “spiral” deposition ...
Fig15. Generation of high-resolution multiple structural colour patterns using M-Ink.
Nature Photonics, [J], 2009, 3(9): 534-540.
Summary and Outlook
A number of fabrication methods are now available to realize responsive photonic structures, the majority of which rely on self-assembly processes to achieve ordering. Compared with microfabrication techniques, self-assembly approaches have lower processing costs and higher production efficiency. However, major efforts are still needed to further develop such approaches to meet the requirements for manufacturing. This report summaries recent developments in the field of responsive photonic crystal structure, including principles for design and fabrication and many strategies for applications. This is an exciting field with tremendous opportunities in both fundamental and technological aspects.
Fig7. a) Preparation of a 2D array CS hydrogel film for pH sensing. b) Photograph of a 2D array CS hydrogel in water. c) SEM image of a 2D array CS hydrogel film. d) Diffraction of a 2D array CS hydrogel film at pH 7 and 5. e) Photograph taken at an angle of 328 to the 2D array normal showing the 2D PS array CS hydrogel colors at pH 7 and 5.
Application of Responsive Photonic Crystals
Active Color Display Units
Fig13. a) Fabrication procedure of a field-responsive PDMS composite embedded with droplets of EG solution of Fe3O4@SiO2 colloids. b) Magnetically induced color change of a flexible PDMS film. c) Schematic illustration of the two-step procedure for fabricating a patterned composite PDMS film which can display letters upon application of magnetic field. d) Digital photos of a patterned PDMS film that can display letters upon the application of an external magnetic field.
Journal of the American Chemical Society, [J], 2009, 131(43): 15687-15694.
Application of RespoFra Baidu biblioteksive Photonic Crystals
Photonic Crystal Sensors
Fig11. Schematic representation of the fabrication route to form TCPC hydrogel supraballs via a microfluidic system.
Advanced Materials, [J], 2009, 21(18): 1801-1804.
Stimuli-Responsive Photonic Crystals
Mechanically Responsive Photonic Crystals
Fig3. Elastic deformation of the colloidal crystal composite film.
Introduction
Chem. Soc. Rev, [J], 2012, 41, 3297-3317
Introduction
photonic crystals：periodic optical nanostructures different refractive index
stimulus-responsive materials
Magnetically Responsive Photonic Crystals
Fig10. a) Synthetic procedures for the magnetochromatic microspheres. b) SEM images of Fe3O4@SiO2 particle chains embedded in a PEGDA matrix. c) Schematic illustrations and optical microscopy images for the magnetochromatic effect caused by rotating the chain-like photonic structures in magnetic fields.
Angewandte Chemie International Edition, [J], 2012, 51:6117 –6120
Stimuli-Responsive Photonic Crystals
Electrically Responsive Photonic Crystals
c)
Fig8. a) Representation of the preparation of PFS-based inverse opals. b) Molecular structure of the electroactive polymers employed in active opals.