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Browsing by Author "Nuru, ZY"

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Cr/alpha-Cr2O3 monodispersed spherical core-shell particles based solar absorbers

Author: Khamlich, S ; Nuru, ZY ; Nemutudi, R ; Nemraoui, O ; Roro, Kittessa T ; Mongwaketsi, N ; McCrindle, R ; Cingo, N ; Maaza, M Date: Jul 2011 Monodispersed spherical core-shell particles of Cr/alpha-Cr2O3 cermet ACG coatings investigated within this contribution could be successfully employed in thermal converters. Their selectivity depends on their chemical, physical and structural ... Read more
Femtosecond laser surface structuring and oxidation of chromium thin coatings: black chromium.

Author: Kotsedi, L ; Nuru, ZY ; Mthunzi-Kufa, Patience ; Muller, TFG ; Eaton, SM ; Julies, B ; Manikandan, E ; Ramponi, R ; Maaza, M Date: Dec 2014 In view of their potential applications as selective solar absorbers, chromium coatings on float glass substrates were nano/micro structured by femtosecond laser in air. Raman and X-rays diffraction investigations confirmed the formation of ... Read more
Femtosecond laser surface structuring of molybdenum thin films

Author: Kotsedi, L ; Mthunzi-Kufa, Patience ; Nuru, ZY ; Eaton, SM ; Sechoghela, P ; Mongwaketsi, N ; Ramponi, R ; Maaza, M Date: Oct 2015 This contribution reports on the femtosecond surface structuring of molybdenum thin coatings deposited by electron beam evaporation onto Corning glass substrates. The 1-D type periodic grating lines created by such an ablation showed that the ... Read more
Microstructure and spectral selectivity of Pt-AI203 nanocoatings for high temperature applications

Author: Nuru, ZY ; Khamlich, S ; Roro, Kittessa T ; Muller, TFG ; Arendse, CJ ; Maaza, M Date: Jul 2011 Monodispersed spherical core-shell particles of Cr/a-Cr2O3 cermet ACG coatings investigated within this contribution could be successfully employed in thermal converters. Their selectivity depends on their chemical, physical and structural ... Read more
Morphological and chemical composition characterization of commercial sepia melanin

Author: Mbonyiryivuze, A ; Nuru, ZY ; Ngom, BD ; Mwakikunga, Bonex W ; Dhlamini, SM ; Park, E ; Maaza, M Date: Jun 2015 Melanins are difficult to characterize because of their intractable chemical properties and the heterogeneity in their structural features. Melanin pigments, in fact, are composed of many different types of monomeric units that are connected ... Read more
Porphyrin nanorods-polymer composites for solar radiation harvesting applications

Author: Mongwaketsi, NP ; Kotsedi, L ; Nuru, ZY ; Sparrow, R ; Garab, G ; Maaza, M Date: Sep 2014 The interest in exploring porphyrin-based nanostructures for artificial solar radiation harvesting stems from their structural similarity to chlorophylls. In nature, the precise organization and orientation of the chlorophylls result in ... Read more
Thermal stability of multilayered Pt-Al2O3 nanocoatings for high temperature CSP systems

Author: Nuru, ZY ; Kotsedi, L ; Arendse, CJ ; Motaung, D ; Mwakikunga, Bonex W ; Roro, Kittessa T ; Maaza, M Date: Oct 2015 This contribution reports on the effect of thermal annealing on sputtered Pt–Al(sub2)O(sub3) multilayered selective solar absorber coatings deposited onto stainless steel substrates with a Mo IR reflecting buffer layer. The Pt–Al(sub2)O(sub3) ... Read more

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Browsing by Author "Nuru, ZY"

Browsing by Author "Nuru, ZY"

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