Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Structural Colour"”.
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Structural Colour in Fruits
Structural colour arises from the constructive interference of light with a material structured on a lengthscale corresponding to optical wavelengths. This phenomenon is responsible for the appearance of many of the brightest colours in nature and recently the existence of structural colouration in …
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Colloidal Self-Assembly of Novel Materials Displaying Structural Colour
… systems. One such class of materials exhibits structural colour, where light is differentially scattered or reflected based not on absorption but on the physical arrangement of the material on the nanoscale. Structurally produced colours tend to be brighter and more vivid than pigment-based …
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Structural colour in marine organisms: From nature to applications
Structural colouration, arising from the interaction of light with transparent materials featuring lengths comparable to visible wavelengths, is a fascinating phenomenon responsible for the appearance of many living organisms. Over the past few decades, such mechanism has been proposed to develop …
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Particle shape optimization in colloidal clusters for structural colour applications
Structural colour is abundant in nature and has been extensively explored using colloidal clusters formed of spherical particles in both experiment and simulation. As compared to pigment based colour, structural colour is more robust to degradation and has the potential for multifunctional …
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Structural colour from a helicoidal cellulose architecture in the secondary cell wall: Optical properties, cell wall composition, structure and morphology of components, and their assembly and interactions.
Structural colours are produced by constructive interference of light scattered from periodically arranged interfaces within nanostructured materials. A common strategy of plants to achieve structural coloration consists of assembling cellulose microfibrils into helicoidal structures. Examples of …
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Structurally coloured bacterial colonies
Structural colouration occurs when visible light interacts with nano-scale structures, creating vibrant colours through an interference mechanism. These non-pigmented colours are widespread in nature, and have been studied extensively in higher organisms such as plants and animals. However, …
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Multi-Functional nano-structures in Nature: from optics to mechanics
… as outstanding mechanical performances or vivid structural colours displayed by natural materials are difficult to be achieved in man-made materials because of the integration of structures from nano- to macro-scales. Biological and bio-inspired studies been attracting researchers in physics, …
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Dynamic Plasmonic Metasurfaces in the Visible Spectrum
… visual displays. As pixel sizes shrink, smaller colour filters will be required. The excitation of plasmonic resonances in metallic nano-structure arrays have resulted in colour filters an order of magnitude smaller than what is currently commercially available. As colour filters, plasmonic …
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Bottlebrush block copolymers for photonic materials
… monomers and polymers employed to produce such structurally coloured materials has remained surprisingly limited. In this dissertation, a series of biocompatible bottlebrush block copolymers (BBCPs) have been synthesised based upon polyester or polyether macromonomers, including: polylactide, …
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Chiral self-assembly of cellulose nanocrystals for photonic films
… dries, resulting in films with vibrant structural colour. Although CNCs have attracted growing interest from different research communities over the past few decades, many fundamental questions about CNC self-assembly remain unanswered. This thesis focuses on two of these questions: …
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Photonic Properties of Liquid Crystalline Hydroxypropyl Cellulose in the Solid-state
… phase in solution, displaying vibrant structural colours. Amongst them, water-soluble hydroxypropyl cellulose (HPC) is ideal for developing sustainable photonic materials to replace toxic dyes and pigments. The development of photonic HPC materials has been, so far, hindered by the …
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Structural Origins and Functions of Colour Diversity in Sea Slugs: Novel Photonic Architectures, Biological Roles, and Biomimetic Applications
… exhibit some of the most brilliantly diverse colours and patterns of all animals on Earth and are often described as the marine world’s answer to butterflies. Whilst the extraordinary variety of their colour palette is well documented, its physical origin has been largely overlooked. In this …
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Utilisation of Cellulose Nanocrystals for the Fabrication of Photonic Materials
Colour in our world is everywhere, and it is a fundamental aspect of communication. In nature some colourations are particularly mesmerising, such as the shimmering patterns on the peacock feather and the metallic blue wings of the Morpho butterfly. These natural objects have vibrant colours and a …
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Enhancing the functionality of photovoltaic and photonic biointerfaces through structuration
… structuration that generates this bee visible colouration.
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Colloidal Self-Assembly: Particle Synthesis, Functionalisation and Applications
… showing iridescence, displayed strong single colour reflectance along with high transmittance, with the reflection colour varying with interparticle distance. Jumping back to colloidal assembly via DNA, rod-sphere structures made from DNA-coated gold nanoparticles and long DNA-coated virions …
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Complex photonic structures in nature: from order to disorder
Structural colours arise from the interaction of visible light with nano-structured materials. The occurrence of such structures in nature has been known for over a century, but it is only in the last few decades that the study of natural photonic structures has fully matured due to the advances in …
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Cellulose photonics: designing functionality and optical appearance of natural materials
… In plants, cellulose is mainly used for structural integrity, however, some species organise cellulose in helicoidal nano-architectures generating strong iridescent colours. Recent research has shown that cellulose nanocrystals, CNCs, isolated from natural fibres, can spontaneously …