Carbon-based nanomaterial synthesis using nanosecond electrical discharges in immiscible layered liquids: <i>n</i>-heptane and water
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Mechanical Engineering Program
Clean Combustion Research Center
KAUST Grant NumberBAS/1/1384-01-01
Permanent link to this recordhttp://hdl.handle.net/10754/627928
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AbstractPlasmas in- or in-contact with liquids have been extensively investigated due to their high potential for a wide range of applications including but not limited to, water treatment, material synthesis and functionalization, bio-medical applications, and liquid fuel reformation. Recently, we successfully developed a discharge using two immiscible liquids, having very different electrical permittivities, which could significantly intensify the electric field intensity. Here, we establish nanosecond discharges at the interface n-heptane-water (with respective relative dielectric permittivities of 2 and 80) to enable the synthesis of carbon-based nanomaterials. A characterization of the as-synthesized material and the annealed (500 °C) material, using various techniques (Fourier-Transform, Infra-Red, Scanning and Transmission electron microscopes, etc.), shows that the as-synthesized material is a mixture of two carbon-based phases: a crystalline phase (graphite like) embedded into a phase of hydrogenated amorphous carbon. The existence of two-phases may be explained by the non-homogeneity of the discharge that induces various chemical reactions in the plasma channel.
CitationHamdan A, Cha MS (2018) Carbon-based nanomaterial synthesis using nanosecond electrical discharges in immiscible layered liquids: n-heptane and water. Journal of Physics D: Applied Physics. Available: http://dx.doi.org/10.1088/1361-6463/aac46f.
SponsorsThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST), under award number BAS/1/1384-01-01