Abstract
Abstract Particle size of the as-deposited carbon spheres (CSs) from plant-derived oil precursor was modified through the addition of a corona discharge ionizer as an attachment to the conventional atmospheric chemical vapor deposition (CVD) setup. Influences of synthesis parameters such as temperature, solvent-oil concentration, and the presence of ionization on the particle size distribution, graphitization, and conductivity of the CSs were also investigated. The addition of pyridine as a solvent to the Calophyllum inophyllum (CI) oil improved precursor atomization, breaking down the viscous oil into finer vapor intermediates and consequently, the process of decomposition. Measured particle size distribution from scanning electron microscope (SEM) and atomic force microscope (AFM) images show a decrease in mean particle diameter, from >180 nm without ionization to
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