Abstract
We have recently developed a technique to synthesize endohedral fullerenes that involves the collision of vaporized fullerenes and plasma particles produced following the laser ablation of a solid material. Using this technique, we synthesized N@C60 using a boron nitride rod as the source of the plasma particles. Optical emission measurements showed that the kinetic energy of N+ ions could be controlled from 20 to 65 eV by changing the energy of the incident laser beam. The synthesis of N@C60 was performed with a N+ kinetic energy of 65 eV, a C60 vaporizing temperature of 800 °C, and a total reaction time of one hour. By optimizing the kinetic energy for producing the encapsulated particles, we were able to synthesis N@C60 with a purity of 4.52 x 10−3%. The purity of our material was two orders of magnitude higher than that achieved using alternative physical synthetic methods that use solid materials, such as arc discharge and co-evaporation methods.
Highlights
Fullerenes have attracted a great deal of attention since their discovery in 1985 because of their unique properties.1 The spherical, hollow structure of these materials allows the confinement of other atoms and molecules inside of them, resulting in endohedral-fullerenes
We have recently developed a technique to synthesize endohedral fullerenes that involves the collision of vaporized fullerenes and plasma particles produced following the laser ablation of a solid material
We have demonstrated a novel synthesis of endohedral fullerenes (N@C60) using a laser ablation plasma from a solid material
Summary
Fullerenes have attracted a great deal of attention since their discovery in 1985 because of their unique properties. The spherical, hollow structure of these materials allows the confinement of other atoms and molecules inside of them, resulting in endohedral-fullerenes. Endohedral fullerenes are generally synthesized by the collision of empty fullerenes with the materials that are to be encapsulated. This is usually achieved using arc-discharge, ion implantation and plasma shower techniques.. This is usually achieved using arc-discharge, ion implantation and plasma shower techniques.18,19 These techniques result in the successful and efficient synthesis of endohedral fullerenes, the lack of effective methods for generating plasmas with high enough densities that increase the probability of collision remains a problem. The synthesis of endohedral fullerenes using laser ablation may be an effective technique. We have developed a novel technique for the synthesis of endohedral fullerenes using plasma generated from laser ablation.
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