Atomic doping of buckyballs

Atomic hole doping of graphene.

The application of graphene in nanoscale electronic devices requires the deliberate control of the density and character of its charge carriers. We show by angle-resolved photoemission spectroscopy that substantial hole doping in the conical band structure of epitaxial graphene monolayers can be achieved by the adsorption of bismuth, antimony, or gold. In the case of gold doping the Dirac point...

Doping scheme of semiconducting atomic chains

Atomic chains, precise structures of atomic scale created on an atomically regulated substrate surface, are candidates for future electronics. A doping scheme for intrinsic semiconducting Mg chains is considered. In order to suppress the unwanted Anderson localization and minimize the deformation of the original band shape, atomic modulation doping is considered, which is to place dopant atoms ...

The Lost Buckyballs

A 15-year-old female with no past medical history presented 3 hours after ingesting 2 Buckyballs she had been using to create a mock tongue piercing. Buckyballs are 5-mm magnets made of neodymium, which is 5 times more powerful than a regular magnet. They are used as educational toys and as an artistic medium. Buckyball stopped production in 2012 after many cases of ingestion and a United State...

Atomic-scale Modeling of Transition-metal Doping of Semiconductor Nanocrystals

Chlorination of charged buckyballs: reactions

The chlorination of singly and multiply charged C60 cations has been investigated with the selected-ion flow tube technique. Observations are reported for the reactions of C60 , C60 21 and C60 z31 with Cl2, CCl4, CDCl3, CH2Cl2 and CH3Cl at room temperature (295 6 2 K) in helium at a total pressure of 0.35 6 0.02 Torr. C60 z1 and C60 21 were observed not to chlorinate, or react in any other way,...