Growth of carbon nano-onions in open air by laser resonant excitation of ethylene precursor Available to Purchase

In this study, a highly efficient method was developed for the growth of carbon nano-onions (CNOs) in open air by effectively coupling the laser energy into the combustion flames through the resonant excitation of C₂H₄ molecules. CNOs with concentric graphitic shells were obtained at the wavelength of 10.532 µm compared with those grown without laser. The growth rate of CNOs at the wavelength of 10.532 µm is 2.1 g/h. Laser scattering during the synthetic process indicates the formation of the CNOs is ascribed to the direct decomposition of the C₂H₄ molecules into solid carbons on surfaces of growing particles