Presentation - Mechanical-tunable Structural Color Inspired by Chameleon Skin
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This document discusses research into mechanically tunable structural color inspired by chameleon skin. The document begins by explaining what structural color is, including how photonic crystals produce structural color. Experiments were conducted to reproduce structural color using self-assembled polystyrene nanospheres on a flexible substrate, and methods to make the color angle-independent were explored, such as suspending crystal fragments in polymer. The research aims to optimize the system to more closely replicate the properties of chameleon skin color changing abilities and find applications such as displays.
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Presentation - Mechanical-tunable Structural Color Inspired by Chameleon Skin
- 1. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Mechanical-tunable Structural Color Inspired by Chameleon Skin Polina Abratenko Lopez Group - Department of Physics and Astronomy July 23, 2015 1 / 16
- 2. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Structural color in nature 2 / 16
- 3. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Structural color in nature 2 / 16
- 4. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Structural color in nature 2 / 16
- 5. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments What is structural color? • Interaction of light with nanoscale structures • Multilayer scales make up the mother-of-pearl of the nautilus • There are a few types of structural color: • Diffraction grating (butterflies, beetles) • Photonic crystals (some butterflies) 3 / 16
- 6. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments What is structural color? • Interaction of light with nanoscale structures • Multilayer scales make up the mother-of-pearl of the nautilus • There are a few types of structural color: • Diffraction grating (butterflies, beetles) • Photonic crystals (some butterflies) 3 / 16
- 7. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments What is structural color? • Interaction of light with nanoscale structures • Multilayer scales make up the mother-of-pearl of the nautilus • There are a few types of structural color: • Diffraction grating (butterflies, beetles) • Photonic crystals (some butterflies) 3 / 16
- 8. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments What is structural color? • Interaction of light with nanoscale structures • Multilayer scales make up the mother-of-pearl of the nautilus • There are a few types of structural color: • Diffraction grating (butterflies, beetles) • Photonic crystals (some butterflies) 3 / 16
- 9. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments What is structural color? • Interaction of light with nanoscale structures • Multilayer scales make up the mother-of-pearl of the nautilus • There are a few types of structural color: • Diffraction grating (butterflies, beetles) • Photonic crystals (some butterflies) 3 / 16
- 10. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Photonic crystals • Made up of different dielectric materials periodically arranged in space • Light passes through lattice, but not band gap • Wavelength disallowed by band gap is the wavelength of the reflected color 4 / 16
- 11. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Photonic crystals • Made up of different dielectric materials periodically arranged in space • Light passes through lattice, but not band gap • Wavelength disallowed by band gap is the wavelength of the reflected color 4 / 16
- 12. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Photonic crystals • Made up of different dielectric materials periodically arranged in space • Light passes through lattice, but not band gap • Wavelength disallowed by band gap is the wavelength of the reflected color 4 / 16
- 13. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments • Recently discovered: chameleon skin uses structural color (photonic crystals) • Most notable: panther chameleon (pictured above) 5 / 16
- 14. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Chameleon skin Nature Communications 6, Article number: 6368 6 / 16
- 15. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Flat films • Reproduced structural color with self-assembled Polystyrene nanospheres • Poly(dimethylsiloxane)(PDMS) substrate • Swelling in silicone oil 7 / 16
- 16. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Flat films • Reproduced structural color with self-assembled Polystyrene nanospheres • Poly(dimethylsiloxane)(PDMS) substrate • Swelling in silicone oil 7 / 16
- 17. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Flat films • Reproduced structural color with self-assembled Polystyrene nanospheres • Poly(dimethylsiloxane)(PDMS) substrate • Swelling in silicone oil 7 / 16
- 18. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Measurement setup 8 / 16
- 19. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments θ-φ Graphs of intensity at wavelength 9 / 16
- 20. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Intensity along the visible light spectrum for the two θ-φ angles 10 / 16
- 21. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Intensity along the visible light spectrum for the two θ-φ angles 11 / 16
- 22. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Angle-independent system • Suspended fragments of crystal 12 / 16
- 23. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Macroscopic angle independence • Could achieve more angle independence on the macro- scale with optimization • Higher concentration of suspended particles in polymer • Smaller fragments • More controlled array of fragments 13 / 16
- 24. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Macroscopic angle independence • Could achieve more angle independence on the macro- scale with optimization • Higher concentration of suspended particles in polymer • Smaller fragments • More controlled array of fragments 13 / 16
- 25. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Macroscopic angle independence • Could achieve more angle independence on the macro- scale with optimization • Higher concentration of suspended particles in polymer • Smaller fragments • More controlled array of fragments 13 / 16
- 26. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Macroscopic angle independence • Could achieve more angle independence on the macro- scale with optimization • Higher concentration of suspended particles in polymer • Smaller fragments • More controlled array of fragments 13 / 16
- 27. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Conclusion • Mechanical-tuning methods were used to change the color of a film consisting of photonic crystals • Lattice constant in (1,1,1) direction decreases and reflectant peak moves to shorter wavelength • Could introduce a macroscopic angle-independent system • Possible to optimize • In future, could replicate chameleon skin with higher accuracy • Many applications (displays, sensors, industrial, military, etc.) 14 / 16
- 28. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Conclusion • Mechanical-tuning methods were used to change the color of a film consisting of photonic crystals • Lattice constant in (1,1,1) direction decreases and reflectant peak moves to shorter wavelength • Could introduce a macroscopic angle-independent system • Possible to optimize • In future, could replicate chameleon skin with higher accuracy • Many applications (displays, sensors, industrial, military, etc.) 14 / 16
- 29. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Conclusion • Mechanical-tuning methods were used to change the color of a film consisting of photonic crystals • Lattice constant in (1,1,1) direction decreases and reflectant peak moves to shorter wavelength • Could introduce a macroscopic angle-independent system • Possible to optimize • In future, could replicate chameleon skin with higher accuracy • Many applications (displays, sensors, industrial, military, etc.) 14 / 16
- 30. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Conclusion • Mechanical-tuning methods were used to change the color of a film consisting of photonic crystals • Lattice constant in (1,1,1) direction decreases and reflectant peak moves to shorter wavelength • Could introduce a macroscopic angle-independent system • Possible to optimize • In future, could replicate chameleon skin with higher accuracy • Many applications (displays, sensors, industrial, military, etc.) 14 / 16
- 31. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Conclusion • Mechanical-tuning methods were used to change the color of a film consisting of photonic crystals • Lattice constant in (1,1,1) direction decreases and reflectant peak moves to shorter wavelength • Could introduce a macroscopic angle-independent system • Possible to optimize • In future, could replicate chameleon skin with higher accuracy • Many applications (displays, sensors, industrial, military, etc.) 14 / 16
- 32. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Conclusion • Mechanical-tuning methods were used to change the color of a film consisting of photonic crystals • Lattice constant in (1,1,1) direction decreases and reflectant peak moves to shorter wavelength • Could introduce a macroscopic angle-independent system • Possible to optimize • In future, could replicate chameleon skin with higher accuracy • Many applications (displays, sensors, industrial, military, etc.) 14 / 16
- 33. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Acknowledgments • Rene Lopez, Yulan Fu, and Cary Tippets • MIRT and NSF • Kacey Hammel and Kathy Wood 15 / 16
- 34. Mechanical- tunable Structural Color Inspired by Chameleon Skin Polina Abratenko What is structural color? Photonic crystals Chameleon structures Flat film methods Flat film results Angle- independent system methods Angle- independent system results Conclusion Acknowledgments Questions and comments Any questions or comments? • A camouflaged panther chameleon 16 / 16