Showing papers on "Nanocages published in 2000"
TL;DR: In this paper, boron nitride nanocages were produced from mixtures of boric acid, urea and silver nitrate upon reduction at 700°C in hydrogen.
Abstract: Silver nanoparticles encapsulated within boron nitride nanocages were produced from mixtures of boric acid, urea and silver nitrate upon reduction at 700°C in hydrogen; this is a useful fabrication method for the mass production of boron nitride nanocapsules at low temperatures compared to the ordinary arc discharge method.
46 citations
TL;DR: In this paper, a new chemical solution process and hybrid arc-discharge method was proposed for the mass production of low-dimensional nanocage structures at low temperatures compared to the ordinary arc discharge method, and various boron nitride and carbon nanocages with electronic conductors, superhard materials, semiconductor nanoparticles and nanowires can be synthesized by the new chemical process.
21 citations
TL;DR: In this article, a technique, laser vaporization by ablating at a solid target in the vapor phase, is developed to produce encapsulated titanium nanocrystals, which can be used to synthesize a large amount of hydrogen released in the synthesis.
Abstract: A technique, laser vaporization by ablating at a solid target in the vapor phase, is developed to produce encapsulated titanium nanocrystals. By vaporizing sponge titanium in benzene vapor, the single titanium crystals encapsulated in carbon nanocages have been synthesized in good yields. The sizes of the encapsulated crystals are around 5–15 nm and the numbers of the wrapped graphitic layers are on the order of 3–10 layers. Characteristic lattice spacings and angles observed by high-resolution transmission electron microscopy identify two phases of the nanocrystals inside the carbon onion cavities as α-Ti and β-Ti. The latter has never been stable below 850 °C until the experiment. The encapsulated titanium crystals adsorbed a large amount of hydrogen released in the synthesis.
5 citations
TL;DR: Carbon nanocapsules and nanotubes have been formed by one-dimensional self-organization of gold nanoparticles caused by the adhesive force at the step edge of amorphous carbon thin films; the present result is expected to be a promising fabrication technique for self-assembling nanowires and cluster-protected quantum dots at scales beyond the limits of current photolithography as discussed by the authors.
Abstract: Carbon nanocapsules and nanotubes have been formed by one-dimensional self-organization of gold nanoparticles, caused by the adhesive force at the step edge of amorphous carbon thin films; the present result is expected to be a promising fabrication technique for self-assembling nanowires and cluster-protected quantum dots at scales beyond the limits of current photolithography.
2 citations
01 Jan 2000
TL;DR: In this paper, it was shown that the molybdenite could be the first inorganic fullerene-style molecular shell (MoS/sub 2/)n, of perhaps several materials based on the transition metal chalcogenides, which could be allowed to create nanocages and nanotubes.
Abstract: It have been shown that the molybdenite could be the first inorganic fullerene-style molecular shell (MoS/sub 2/)n, of perhaps several materials, based on the transition metal chalcogenides, which could be allowed to create nanocages and nanotubes We first describe in detail the attempt to produce nanostructures from nano-size MoS/sub 2/ powder by thermal annealing in vacuum conditions We show the chemical synthesis process of nano-size MoS/sub 2/ powder and the technological regimes of thermal treatment of molybdenite nano-size powder The TEM images of thermal treated molybdenite powder show the appearance of curvature of reflective planes [002], which could be considered as initial seeds for nanostructures
1 citations