Journal
JOURNAL OF NANOPARTICLE RESEARCH
Volume 9, Issue 6, Pages 1181-1185Publisher
SPRINGER
DOI: 10.1007/s11051-006-9192-4
Keywords
carbon nitride; laser ablation; liquid-solid interface; nanoparticle; nanorods; synthesis
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Crystalline carbon nitride nanopowders and nanorods have been successfully synthesized at room temperature and pressure using the novel technique of pulsed laser ablation of a graphite target in liquid ammonia solution. High-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), and Fourier transform infrared spectroscopy (FTIR) were used to systematically study the morphology, nanostructure and chemical bonding. The experimental composition and structure of the nanoparticles are consistent with the theoretical calculations for alpha-C(3)N(4). After 2 h ablation the particles had a size distribution similar to 8-12 nm, whereas after 5 h ablation the particles had grown into nanorod-like structures with a crystalline C(3)N(4) tip. A formation mechanism for these nanorods is proposed whereby nanoparticles are first synthesized via rapid formation of an embryonic particle, followed by a slow growth, eventually leading to a one-dimensional nanorod structure.
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