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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 1 to 5 of 5 (0.073 seconds)| 1 |
Optimisation des structures nanophotoniques pour le photovoltaïque / Optimization of nanophotonic structures for photovoltaicsBarry, Mamadou Aliou 21 March 2018 (has links)
Ce manuscrit s'attache au problème du design en photonique, à savoir déterminer la meilleure façon d'agencer des éléments nanométriques pour obtenir la réponse optique que l'on désire. Différents algorithmes sont testés. Un algorithme en particulier semble adapté à ce type de problème, et permet de retrouver des structures photoniques présentes dans la nature sur les carapaces de certains insectes ou les ailes de certains papillons. Appliqué à l'anti-reflet d'une cellule photovoltaïque, l'algorithme a permis de trouver une structure contre-intuitive mais particulièrement efficace, ce qui montre tout le potentiel de cette technique. / The present manuscript deals with the problem of the design in photonics, i.e. to determine which is the best way to assemble nanometric elements to reach a desired optical response. Different algorithms are tested. One algorithm in particular seems well adapted to this kind of problem, and allows to retrieve the most emblematic photonic structures which a present in nature on the tegument of insects or on the wings of butterflies. Applied to the case of an anti-reflective coating for a photovoltaic device, the algorithm has produced a particularly counter intuivite but efficient structure. This clearly demonstrates the potential of such an approach.
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BIO-INSPIRED MELANIN-BASED STRUCTURAL COLORS THROUGH SELF-ASSEMBLYXiao, Ming January 2017 (has links)
No description available.
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Stereocomplex poly (methyl methacrylate) fibers and self-reinforced composites and structural color of butterflies and beetles - characterization, replication and mimicryCrne, Matija 12 May 2009 (has links)
Stereocomplex poly(methyl methacrylate) (PMMA) fibers for the purpose of reinforcing PMMA materials were developed. These kinds of composites are known as "self-reinforced" composites. We were successful in producing stereocomplex PMMA fibers with three different methods - wet spinning, gel spinning and electrospinning. Gel spinning and electrospinning produced the most crystalline fibers. Steroecomplex PMMA fibers were further shown to be resistant to high temperature and also to hot monomer solvent during bulk polymerization.
We further describe our efforts in characterization, replication and mimicry of structural color features of butterflies and beetles. We have developed a simple method of characterizing the bidirectional reflectance distribution function of microscopic objects such as butterfly wing scales. We used this method to characterize nanometer sized structural color features resulting from the replication of butterfly Morpho rhetenor, mimickry of butterfly Papilio palinurus and also the native structural color features of iridescent beetle Chrysina gloriosa, which were shown to be cholesteric focal conic defects lined on the surface.
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Bio-Inspired Synthetic Melanin-Based Structural Colors and Thermally Responsive NanocompositesEcheverri, Mario 28 November 2021 (has links)
No description available.
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Structural Color Production in Melanin-based Amorphous Colloidal AssembliesPatil, Anvay 05 June 2022 (has links)
No description available.
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