Helical superstructures of fullerene peapods and empty single-walled carbon nanotubes formed in water

Article Abstract:

The discovery that aqueous dispersions of empty single-walled carbon nanotubes (SWNTs) and of fullerene peapods prepared by using a carbon nanotube solubilizer trimethyl-(2-oxo-2-pyrene-1-yl-ethyl)-ammonium bromide form helical carbon nanotube superstructures in the shapes of rings, irregular rings, lassos handcuffs, catenanes, and pseudorotaxanes is presented. The mechanism of the superstructure formation is discussed in relation to the unique characteristics of stiff polymer chains with the aid of an off-lattice Monte Carlo simulation.

Carbon compounds, Aqueous solution reactions, Nanotubes, Fullerenes

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Optical trapping of a growing water droplet in air

Article Abstract:

A demonstration of the optical trapping of a water droplet in the gas phase with a converged laser is presented. The results reveal that the optical trapping is useful for observing the dynamic instability of micrometer-scale systems.

Nucleation, Nucleation (Chemistry), Optics, Optical research, Water vapour, Water vapor

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The curious world of polypseudorotaxanes: cyclodextrins as probes of water structure

Article Abstract:

The formation and the properties of polypseudorotaxanes (PPR) are explained. PPR are formed by polymeric chains and cyclodextrins in water.

Water chemistry, Cyclodextrins, Structure

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