http://www.cnr.it/ontology/cnr/individuo/prodotto/ID190647

Controlled synthesis of carbon nanostructures using aligned ZnO nanorods as templates (Articolo in rivista)

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Controlled synthesis of carbon nanostructures using aligned ZnO nanorods as templates (Articolo in rivista) (literal)

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Puleng Mbuyisa , Sunil P. Bhardwaj, Federica Rigoni, Elvio Carlino, Stefania Pagliara, Luigi Sangaletti, Andrea Goldoni, Muzi Ndwandwe, Cinzia Cepek (2012)
Controlled synthesis of carbon nanostructures using aligned ZnO nanorods as templates
in Carbon; Pergamon-Elsevier Science Ltd., Oxford (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Puleng Mbuyisa , Sunil P. Bhardwaj, Federica Rigoni, Elvio Carlino, Stefania Pagliara, Luigi Sangaletti, Andrea Goldoni, Muzi Ndwandwe, Cinzia Cepek (literal)

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Puleng Mbuyisa a, Sunil P. Bhardwaj b, Federica Rigoni c, Elvio Carlino b, Stefania Pagliara c, Luigi Sangaletti c, Andrea Goldoni d, Muzi Ndwandwe a, Cinzia Cepek b,* a Department of Physics and Engineering, University of Zululand, Private Bag X1001, Kwadlangezwa 3886, South Africa b Istituto Officina dei Materiali-CNR, Laboratorio TASC, Strada Statale 14, Km 163.5, I-34149 Trieste, Italy c Interdisciplinary Laboratory for Advanced Materials Physics and Dipartimento di Matematica e Fisica, Universita` Cattolica del Sacro Cuore, via dei Musei 41 I-25121 Brescia, Italy d Sincrotrone Trieste S.C.p.A., Strada Statale 14, Km 163.5, I-34149 Trieste, Italy (literal)

Titolo

Controlled synthesis of carbon nanostructures using aligned ZnO nanorods as templates (literal)

Abstract

By combining in situ X-ray photoemission spectroscopy, ex situ high resolution transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy, we show that chemical vapor deposition (CVD) on vertically aligned ZnO nanorods can synthesize different carbon nanostructures (CNs), whose morphology is driven by the ZnO nanorods and whose dimensions and structures change as a function of the process temperature. The CNs range from amorphous carbon cups, completely covering the nanorods, to high density one-dimensional carbon nano-dendrites (CNDs), which start to appear like short hairs on the ZnO nanorods. The nanorods are partially etched when the process is done at 630-800 ?C, while they are completely etched at temperatures higher than 800 ?C. In the latter case, CNDs emerge from a porous carbon sponge formed at the substrate interface but they are preferentially aligned along the location of the pristine ZnO nanorods. When used as a chemiresisitor the CND-ZnO structures have a higher sensitivity to ammonia compared to chemiresistors made by bare ZnO nanorods, to other one-dimensional CNs, like carbon nanotubes or other metal/metal-oxides hybrid CNs. (literal)

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