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Open AccessFeature PaperArticle

Cu Nano-Roses Self-Assembly from Allium cepa, L., Pyrolysis by Green Synthesis of C Nanostructures

1
CNR-ISM, via del Fosso del Cavaliere 100, 00133 Rome, Italy
2
INFN-Laboratori Nazionali di Frascati, Via Enrico Fermi Frascati 40, 00044 Rome, Italy
3
CNR-ISAC, via del Fosso del Cavaliere 100, 00133 Rome, Italy
4
CNR-ISM, via Salaria Km 29300, Monterotondo Stazione, 00015 Rome, Italy
5
CNR-IMM, via del Fosso del Cavaliere 100, 00133 Rome, Italy
6
Science Department, University of Roma Tre, Largo San Leonardo Murialdo 1, 00146 Rome, Italy
7
ENEA-Casaccia, via Anguillarese S. Maria di Galeria 301, 00123 Rome, Italy
8
Centre for Nano-materials & Displays, B. M. S. College of Engineering, Bull Temple Road, Basavanagudi, Bengaluru, Karnataka 560 019, India
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(11), 3819; https://doi.org/10.3390/app10113819
Received: 16 April 2020 / Revised: 25 May 2020 / Accepted: 27 May 2020 / Published: 30 May 2020
(This article belongs to the Special Issue Self-Assembly in Chemistry and Supramolecular Chemistry)
Carbon nanostructures are achieved by bio-waste Allium cepa, L., (onion vulgaris) peels through pyrolysis at 900 °C. They contain dispersed elements derived by their bio-precursors, like Mg, Ca, S, Na, K, and Cu. Here, we report the self-assembly of new Cu flower-shaped nanostructures organized as nano-roses. Remarkably, the nano-roses show rolled-up petals of Cu0 with a high chemical stability in air, exhibiting an intrinsic pure Cu crystalline phase. This suggests the exceptional potentiality to synthesize Cu0 nanostructures with novel physical/chemical properties. The size, morphology, and chemical composition were obtained by a combination of high-resolution scanning electron microscopy, energy dispersive X-ray spectroscopy, energy dispersive X-ray diffraction, and Raman spectroscopy. View Full-Text
Keywords: Allium cepa, L., pyrolysis; green carbon nanostructures; Cu metallic nano-roses; SEM/EDS; ED-XRD; Raman spectroscopy Allium cepa, L., pyrolysis; green carbon nanostructures; Cu metallic nano-roses; SEM/EDS; ED-XRD; Raman spectroscopy
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MDPI and ACS Style

De Padova, P.; Generosi, A.; Paci, B.; Olivieri, B.; Ottaviani, C.; Quaresima, C.; Suber, L.; Di Pietrantonio, F.; Della Ventura, G.; Pilloni, L.; Supriya, S.; Hegde, G. Cu Nano-Roses Self-Assembly from Allium cepa, L., Pyrolysis by Green Synthesis of C Nanostructures. Appl. Sci. 2020, 10, 3819.

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