A5008623411- melanin and skin pigmentation
- Silk-based biomaterials and applications
- Insect and Arachnid Ecology and Behavior
- Microplastics and Plastic Pollution
- Biochemical Analysis and Sensing Techniques
- Neurobiology and Insect Physiology Research
- Dyeing and Modifying Textile Fibers
- Advanced Sensor and Energy Harvesting Materials
- Additive Manufacturing and 3D Printing Technologies
- Recycling and Waste Management Techniques
- Extraction and Separation Processes
- Insect Utilization and Effects
- Date Palm Research Studies
- Nanomaterials and Printing Technologies
- Cephalopods and Marine Biology
Polytechnique Montréal
2021-2024
Melanins (from the Greek μέλας, mélas, black) are bio-pigments ubiquitous in flora and fauna. Eumelanin is an insoluble brown–black type of melanin, found vertebrates invertebrates alike, among which Sepia (cuttlefish) noteworthy. melanin a bio-sourced eumelanin that can readily be extracted from ink sac cuttlefish. features broadband optical absorption, metal-binding affinity antioxidative radical-scavenging properties. It prototype benign material for sustainable organic electronics...
Sepia melanin, a biopigment extracted from the ink sac of cuttlefish, is relevant to sustainable organic electronics. In this work, we flexographically print films an melanin including shellac as bio-sourced binder on silver electrode-patterned paper. We examine electrical response in high humidity and ambient conditions (here electronic conductivity 10−4 S/cm). Additionally, study biodegradation printed their individual constituents based mineralization into CO2 under composting conditions....
Eumelanin, the brown-black member of melanin biopigment family, is a prototype material for sustainable (green) organic electronics. Sepia eumelanin (Sepia) type biosourced extracted from ink sac cuttlefish. Electron microscopy and scanning probe images show distinguishable near spherical granules with diameters about 150-200 nm. We have recently reported on predominant electronic transport in printed films formulated inks including (insulating) binder Polyvinyl-butyral (PVB). In that work,...
Eumelanin, a macromolecular biopigment, is an attractive candidate for sustainable (green) organic electronics. Establishing structure–property relationships in eumelanin films essential step to exploit its technological potential. We report on the evolution from molecular state film after spin coating silicon dioxide solutions of (5,6)-dihydroxyindole (DHI) and (5,6)-dihydroxyindole-2-carboxylic acid (DHICA) building blocks (monomers). The spin-coated was studied under various environmental...
Global materials' and energy constraints environmental issues call for a holistic approach to waste upcycling. We propose chemically rational, cost-effective environmentally friendly recovery of non-leaching gold from e-waste using aqueous chemistry with hydrogen peroxide, an benign oxidant, lactic acid, food chain byproduct. The oxidation the base metals enables release in its metallic state form flakes subsequently separated via filtration. Our main byproduct is precursor Cu2O, relevant...
Abstract BACKGROUND Bio‐sourced (natural) organic materials are often chemically and structurally disordered, such that their structure‐property relationships must be explored using model systems. Eumelanin is an interesting candidate among natural materials. RESULTS In this work, the locations of highest occupied molecular orbital (HOMO) lowest unoccupied (LUMO) energy levels 5,6‐dihydroxyindole (DHI) 5,6‐dihydroxyindole‐2‐carboxylic acid (DHICA) building blocks (monomers) black‐brown...
Sepia melanin, extracted from the ink sac of cuttlefish, is a bio-sourced pigment relevant to sustainable (green) organic electronics. In this work, we flexographically printed films an melanin including shellac as binder on silver electrode-patterned paper (hereafter referred film). We studied electrical response in ambient and wet atmosphere conditions. former case, deduced electronic conductivity high 10−4 S cm−1. Further, biodegradation their individual constituents based mineralization...