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Non-iridescent structural colouration in three distinct colours of paperflower petals
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Non-iridescent structural colouration in three distinct colours of paperflower petals
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Journal Article
Non-iridescent structural colouration in three distinct colours of paperflower petals
2025
Overview
The topic of structural colour is crucial in the current world as it affects our day-today lives, both in the form of household items and appliances, as well as in industrial settings. The present work delves into the significance of microstructures in determining the visual appearance of three distinct colours of paperflower ( Bougainvillea ) petals: pink, yellow, and white. With the aid of a field emission scanning electron microscope, we study the surface morphology of the specimen. We affirm that micro-papillae and nanostructures present on the surface dictate the colour of the aforementioned specimen types along with the pigments. A sophisticated micro-spectrophotometry technique has been employed to acquire reflectance and polarization-sensitive reflectance features. The reflectance characteristics pertaining to their microstructures has been studied. Additionally, we anticipate that the random arrangements of the epidermal cells provide sensitivity to the specimen towards polarized light. Alcoholic media with various refractive indices have been used to demonstrate the contribution and manifestation of structural colour. Furthermore, angle-resolved UV-vis spectral features have been examined to ensure their viewing angle dependency. Moreover, an attempt has been made to use polyvinyl alcohol polymer negative replica to bio-mimic the petal microstructure. Our study is expected to unfold new insights that may hold value in the fields of nano-photonics, nano-coatings, textile design, etc.
Publisher
IOP Publishing
Subject
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