Fabrication of nano-onion-structured graphene films from Citrus sinensis extract and their wetting and sensing characteristics

Alancherry, Surjith, Bazaka, Kateryna, Levchenko, Igor, Al-jumaili, Ahmed, Kandel, Bigyan, Alex, Aaron, Hernandez, Francisco C. Robles, Varghese, Oomman K., and Jacob, Mohan V. (2020) Fabrication of nano-onion-structured graphene films from Citrus sinensis extract and their wetting and sensing characteristics. Applied Materials and Interfaces, 12. pp. 29594-29604.

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Graphene and its derivatives have acquired substantial research attention in recent years because of their wide range of potential applications. Implementing sustainable technologies for fabricating these functional nanomaterials is becoming increasingly apparent, and therefore, a wide spectrum of naturally derived precursors has been identified and reformed through various established techniques for the purpose. Nevertheless, most of these methods could only be considered partially sustainable because of their complexity as well as high energy, time, and resource requirements. Here, we report the fabrication of carbon nano-onion-interspersed vertically oriented multilayer graphene nanosheets through a single-step, environmentally benign radio frequency plasma-enhanced chemical vapor deposition process from a low-cost carbon feedstock, the oil from the peel of Citrus sinensis orange fruits. C. sinensis essential oil is a volatile aroma liquid principally composed of nonsynthetic hydrocarbon limonene. Transmission electron microscopy studies on the structure unveiled the presence of hollow quasi-spherical carbon nano-onion-like structures incorporated within graphene layers. The as-fabricated nano-onion-incorporated graphene films exhibited a highly hydrophobic nature showing a water contact angle of up to 129(0). The surface energies of these films were in the range of 41 to 35 mJ.m(-2). Moreover, a chemiresistive sensor directly fabricated using C. sinensis-derived onion-structured graphene showed a p-type semiconductor nature and a promising response to acetone at room temperature. With its unique morphology, surface properties, and electrical characteristics, this material is expected to be useful for a wide range of applications.

Item ID: 63898
Item Type: Article (Research - C1)
ISSN: 1944-8252
Keywords: plasma enhanced chemical vapor deposition, chemical vapor deposition, organic precursor, graphene, nano onion, chemical sensor
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Copyright Information: © 2020 American Chemical Society.
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The Supporting Information is available free of charge at the ACS website. See Related URLs.

Funders: Australian Research Council (ARC), James Cook University Postgraduate Research Fellowship
Date Deposited: 29 Jul 2020 07:37
FoR Codes: 40 ENGINEERING > 4016 Materials engineering > 401699 Materials engineering not elsewhere classified @ 100%
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