White aluminium by bio-inspiration
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1 White aluminium by bio-inspiration Villads Egede Johansen Marie Sklodowska-Curie Fellow Vignolini group, Melville Laboratory, Department of Chemistry, University of Cambridge
2 Outline White aluminium Bio-inspired colours Outlook 2 Department of Chemistry Disruptive Conceptualisation Day
3 The ODAAS 1 project consortium 1 Optically Designed Anodized Aluminum Surfaces 3 Department of Chemistry Disruptive Conceptualisation Day
4 The ODAAS 1 project consortium Scope To obtain an anodised white appearance of aluminium to extend B&O s design possibilities beyond the current limitations 1 Optically Designed Anodized Aluminum Surfaces 3 Department of Chemistry Disruptive Conceptualisation Day
5 Coloured aluminium 4 Department of Chemistry Disruptive Conceptualisation Day
6 Coloured aluminium 4 Department of Chemistry Disruptive Conceptualisation Day
7 Colouration of aluminum 5 Department of Chemistry Disruptive Conceptualisation Day
8 Colouration of aluminum 5 Department of Chemistry Disruptive Conceptualisation Day
9 Colouration of aluminum There is no analogy between coloured aluminium and white aluminium 5 Department of Chemistry Disruptive Conceptualisation Day
10 Why are objects white? 6 Department of Chemistry Disruptive Conceptualisation Day
11 Predicting white aluminium Standard metal Green colored Equally reflective Added diffuse 7 Department of Chemistry Disruptive Conceptualisation Day
12 Inventing new colours 1 Visual perception of materials and their properties Not only do we encounter new materials throughout our childhood, from time to time material science also creates new materials with completely novel appearances, such as complex paints and textiles with unusual colour characteristics, or holograms, which have a highly distinctive look, quite unlike most natural materials. 1 Roland W Fleming. Visual perception of materials and their properties. In: Vision Research 94 (2014), pp Department of Chemistry Disruptive Conceptualisation Day
13 Inventing new colours 1 Visual perception of materials and their properties Not only do we encounter new materials throughout our childhood, from time to time material science also creates new materials with completely novel appearances, such as complex paints and textiles with unusual colour characteristics, or holograms, which have a highly distinctive look, quite unlike most natural materials. perception of a new material can be shaped freely 1 Roland W Fleming. Visual perception of materials and their properties. In: Vision Research 94 (2014), pp Department of Chemistry Disruptive Conceptualisation Day
14 Outline White aluminium Bio-inspired colours Outlook 9 Department of Chemistry Disruptive Conceptualisation Day
15 The Morpho butterfly 1 a motivation 1 P Vukusic et al. Quantified interference and diffraction in single Morpho butterfly scales. In: Proceedings of the Royal Society of London B: Biological Sciences 266 (Apr. 1999), pp Department of Chemistry Disruptive Conceptualisation Day
16
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18 Basic types of visible light interaction 1 Absorption Incoherent Coherent Material properties Particle scattering Interference (plasmonic effects) (rainbows) (structure interaction) 1 Richard O Prum, Tim Quinn, and Rodolfo H Torres. Anatomically diverse butterfly scales all produce structural colours by coherent scattering. In: The Journal of Experimental Biology 209 (2006), pp Department of Chemistry Disruptive Conceptualisation Day
19 Wave interference 14 Department of Chemistry Disruptive Conceptualisation Day
20 Wave interference Wave 1 Wave 2 Air Soap Air Optical path diff. 14 Department of Chemistry Disruptive Conceptualisation Day
21 Wave interference Wave 1 Wave 2 Air Soap Air Optical path diff. 14 Department of Chemistry Disruptive Conceptualisation Day
22 Wave interference Wave 1 Wave 2 Air Soap Air Optical path diff. 14 Department of Chemistry Disruptive Conceptualisation Day
23 Wave interference Wave 1 Wave 2 Air Soap Air Optical path diff. 14 Department of Chemistry Disruptive Conceptualisation Day
24 Wave interference Wave 1 Wave 2 Air Soap Air Optical path diff. 14 Department of Chemistry Disruptive Conceptualisation Day
25 Multilayers in beetles 1 1 Doekele G Stavenga et al. Polarized iridescence of the multilayered elytra of the Japanese jewel beetle, Chrysochroa fulgidissima. In: Philosophical Transactions of the Royal Society B 366 (2011), pp Department of Chemistry Disruptive Conceptualisation Day
26 Iridescent peacock feathers 1 (2D photonic crystal) 1 Jian Zi et al. Coloration strategies in peacock feathers. In: Proceedings of the National Academy of Sciences (2003), pp Department of Chemistry Disruptive Conceptualisation Day
27 White beetle 1 1 Matteo Burresi et al. Bright-White Beetle Scales Optimise Multiple Scattering of Light. In: Scientific Reports (2014), pp Department of Chemistry Disruptive Conceptualisation Day
28 And the list continues Department of Chemistry Disruptive Conceptualisation Day
29 Take a minute to reflect upon Nature s wonders 19 Department of Chemistry Disruptive Conceptualisation Day
30 Morpho blue biomimicry 12 1 Akira Saito. Biomimetics in Photonics (Chapter 7). CRC Press, Akira Saito et al. Reproduction, Mass-production, and Control of the Morpho-butterfly s Blue. In: Advanced Fabrication Technologies for Micro/Nano Optics and Photonics II. vol Sept. 2009, pp Department of Chemistry Disruptive Conceptualisation Day
31 Other theoretical design predictions Villads E Johansen. Optical role of randomness for structured surfaces. In: Applied Optics (Apr. 2014), pp Jacob Andkjær et al. Inverse design of nanostructured surfaces for color effects. In: Journal of the Optical Society of America B 31.1 (Jan. 2014), pp Villads E Johansen et al. Designing visual appearance using a structured surface. In: Optica 2.3 (2015), pp Department of Chemistry Disruptive Conceptualisation Day
32 Other theoretical design predictions Villads E Johansen. Optical role of randomness for structured surfaces. In: Applied Optics (Apr. 2014), pp Jacob Andkjær et al. Inverse design of nanostructured surfaces for color effects. In: Journal of the Optical Society of America B 31.1 (Jan. 2014), pp Villads E Johansen et al. Designing visual appearance using a structured surface. In: Optica 2.3 (2015), pp Department of Chemistry Disruptive Conceptualisation Day
33 Conceptual design of white aluminium Red aluminium Mirror-like aluminium White aluminium concept 22 Department of Chemistry Disruptive Conceptualisation Day
34 Proposals for obtaining white aluminium Partly painted surface 23 Department of Chemistry Disruptive Conceptualisation Day
35 Proposals for obtaining white aluminium Partly painted surface Butterfly structuring 23 Department of Chemistry Disruptive Conceptualisation Day
36 Proposals for obtaining white aluminium Partly painted surface Butterfly structuring Optical brightening 23 Department of Chemistry Disruptive Conceptualisation Day
37 Proposals for obtaining white aluminium Partly painted surface Butterfly structuring Optical brightening Mixing paint particles in Al 23 Department of Chemistry Disruptive Conceptualisation Day
38 Trial results 24 Department of Chemistry Disruptive Conceptualisation Day
39 Derived effects 25 Department of Chemistry Disruptive Conceptualisation Day
40 Outline White aluminium Bio-inspired colours Outlook 26 Department of Chemistry Disruptive Conceptualisation Day
41 Bio-inspired photonics Department of Chemistry Disruptive Conceptualisation Day
42 Cellulose NanoCrystal (CNC) films 1 Cellulose structure 9 acid hydrolysis of e.g. wood pulp CNC film casting 1 ref. 28 Department of Chemistry Disruptive Conceptualisation Day
43 CNC droplets 1 1 Richard M Parker et al. Hierarchical Self-Assembly of Cellulose Nanocrystals in a Confined Geometry. In: ACS Nano tbd (2016). 29 Department of Chemistry Disruptive Conceptualisation Day
44 Hydroxypropyl cellulose (HPC) sensors 1 * This material is edible! 1 Gen Kamita et al. Biocompatible and Sustainable Optical Strain Sensors for Large-Area Applications. In: Advanced Optical Material tbd (2016). 30 Department of Chemistry Disruptive Conceptualisation Day
45 Conclusions White aluminium now exists? Visual appearance can be designed Nanotechnology allows novel designs and investigations Novel appearance = novel material Awareness of gap between lab scale and production scale is important... forgetting that awareness is important as well 31 Department of Chemistry Disruptive Conceptualisation Day
46 Questions? 32 Department of Chemistry Disruptive Conceptualisation Day
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