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Islam, M., Achour, A., Saeed, K., Boujtita, M., Javed, S. & Djouadi, M. A. (2018) Metal/Carbon Hybrid Nanostructures Produced from Plasma-Enhanced Chemical Vapor Deposition over Nafion-Supported Electrochemically Deposited Cobalt Nanoparticles. Materials, 11 687. 
Added by: Richard Baschera (2018-07-17 08:58:09)   Last edited by: Richard Baschera (2018-07-24 13:08:32)
Type de référence: Article
DOI: 10.3390/ma11050687
Numéro d'identification (ISBN etc.): 1996-1944
Clé BibTeX: Islam2018
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Créateurs: Achour, Boujtita, Djouadi, Islam, Javed, Saeed
Collection: Materials
Consultations : 5/274
Indice de consultation : 2%
Indice de popularité : 0.5%
In this work, we report development of hybrid nanostructures of metal nanoparticles (NP) and carbon nanostructures with strong potential for catalysis, sensing, and energy applications. First, the etched silicon wafer substrates were passivated for subsequent electrochemical (EC) processing through grafting of nitro phenyl groups using para-nitrobenzene diazonium (PNBT). The X-ray photoelectron spectroscope (XPS) and atomic force microscope (AFM) studies confirmed presence of few layers. Cobalt-based nanoparticles were produced over dip or spin coated Nafion films under different EC reduction conditions, namely CoSO4 salt concentration (0.1 M, 1 mM), reduction time (5, 20 s), and indirect or direct EC reduction route. Extensive AFM examination revealed NP formation with different attributes (size, distribution) depending on electrochemistry conditions. While relatively large NP with {>}100 nm size and bimodal distribution were obtained after 20 s EC reduction in H3BO3 following Co2+ ion uptake, ultrafine NP ({<} 10 nm) could be produced from EC reduction in CoSO4 and H3BO3 mixed solution with some tendency to form oxides. Different carbon nanostructures including few-walled or multiwalled carbon nanotubes (CNT) and carbon nanosheets were grown in a C2H2/NH3 plasma using the plasma-enhanced chemical vapor deposition technique. The devised processing routes enable size controlled synthesis of cobalt nanoparticles and metal/carbon hybrid nanostructures with unique microstructural features.
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