9.1 Materials by Design: Molecular Contributions to Coloration in Cephalopod Chromatophores for Bio-inspired Photonic Systems
Abstract
Major Goals: Major Goals: This fundamental (6.1) innovative research investigates next generation, sustainable coatings that address PP-13-12-03: green pigments that provide both visible and infrared (IR) coloration in polymers, without using chromium-based pigments, and responsive, multi-functional surface coatings that include tunable pigments with low ESOH risk. CCDC-SC and Northeastern University have partnered to build on earlier informal collaboration under a CCDC-SC 6.1 nano-enhanced scattering program. In thin films containing chromatophore pigment granules (diameter ~ 500 nm), we observed large (> 40%) forward scattering of visible and near-IR light, providing clues on how to obtain ideal coloration (e.g., bright and spectrally-pure reflectivity) and tunability when combined with the underlying cephalopod iridophores and leucophore organs. In this EQBR work, our major goals are to expand on these exciting findings by: 1- Measure/model back- and forward-scattering of cephalopod granules 2- Compare to control samples for scattering: plasmonic nanoparticles 3- Determine effect of thickness, particle distribution, and reflector on scattering/absorption; Deliverable: create and test molecular-based model describing bio-optics and color richness in cephalopods 4- Investigate tunability of color in response to pH and electrochemical triggers5- Investigate tunability of color in response to optical triggers 6- New design/synthesis of samples (Deliverable) to improve tunability 7- Transition to fiber platform (Deliverable: scattering fibers) 8- Demonstrate tunability of color in response to trigger(s) in films Accomplishments: 1. Fabricated films comprising a distribution of squid pigment granules with multiple thicknesses. Monolayer and multilayer films were designed to represent the dynamic states (fully expanded to punctate forms) of the chromatophore.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 22, 2021
- Accession Number
- AD1196194
Entities
People
- Leila F Deravi
Organizations
- Northeastern University