Global ETD Search
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Showing 1 to 9 of 9 for “"structural colours"”.
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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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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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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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Utilisation of Cellulose Nanocrystals for the Fabrication of Photonic Materials
… butterfly. These natural objects have vibrant colours and a metallic appearance due to light interference, in contrast to the colour obtained by dyes and pigments which rely on absorption. Such colours are referred to as ‘structural’ as they are the result of the interaction of light with …
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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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Towards Mechanochromic Devices using Biocompatible Hydroxypropyl Cellulose
… When dissolved at high concentrations it forms structural colours via the formation of a cholesteric, liquid crystalline mesophase, termed photonic HPC. Intrinsically biodegradable, edible and mechanochromic, photonic HPC can be manufactured at scale and low-cost in a simple formulation. A high …
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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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The interplay between order and disorder in cholesteric hydroxypropyl cellulose films
Structural colouration originates from the physical interaction between light and nanostructured materials, unlike pigments and dyes, where colour is achieved by selective absorption. The formation of a cholesteric liquid crystalline phase is one route to achieve such structuring on the nanoscale. …
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On the molecular pathways supporting the development of structurally coloured cuticle in Hibiscus trionum
… Hibiscus trionum petals revealed the presence of structural colours. They are mainly characterised by the specific reflection of blue and UV-light in an angle dependant manner (also known as iridescence). Further observations of the cuticle showed the presence of nano-scaled striations acting as a …