Carbon Nanofoam Formed by Laser Ablation
Foam-like carbon (carbon nanofoam, CNF) which belongs to the porous carbon family is formed by pulsed laser ablation of graphite in liquid nitrogen. Each bubble is about 3–10 nm in size and has a layered structure with typically one to four graphene layers. The CNF forms nanoparticles of about 100 nm in size. CNF encapsulating platinum nanoparticles ([email protected]) is formed when a mixture of graphite, platinum, and hexadecanoic acid is used as a target. Each bubble encapsulating a platinum nanoparticle is approximately 15±4 nm in diameter and contains typically 6±3 graphene walls. The platinum nanoparticles in the CNF are 9±4 nm in diameter. The annealing of the [email protected] at 300 °C for a week in vacuum reveals that the CNF effectively prevents the platinum nanoparticles from aggregating.
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Document Type: Research Article
Publication date: March 1, 2012
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