Approaching an organic semimetal: Electron pockets at the Fermi level for a -benzoquinonemonoimine zwitterion.

There is compelling evidence of electron pockets, at the Fermi level, in the band structure for an organic zwitterion molecule of the -benzoquinonemonoimine type. The electronic structure of the zwitterion molecular film has a definite, although small, density of states evident at the Fermi level as well as a nonzero inner potential and thus is very different from a true insulator. In spite of a small Brillouin zone, significant band width is observed in the intermolecular band dispersion.

A new device for alveolar bone transportation.

We present a retrospective review of a new technique for the transportation of alveolar bone using a Hyrax device modified by the principal author (O.A.V.

Nanoscale fabrication of the ferroelectric polymer poly(vinylidene fluoride with trifluoroethylene) P(VDF-TrFE) 75:25 thin films by atomic force microscope nanolithography.

Thin films of an organic ferroelectric system, poly(vinylidene fluoride with trifluoroethylene) P(VDF-TrFE, Kureha Corporation, Tokyo, Japan) 75:25 layers, have been deposited on highly ordered pyrolytic graphite and silicon dioxide by the horizontal Schaefer method of Langmuir-Blodgett techniques. It is possible to "shave" or mechanically displace small regions of the polymer film by using atomic force microscope nanolithography techniques such as nanoshaving, leaving swaths of the surface cut to a depth of 4 nm and 12 nm exposing the substrate. The results of fabricating stripes by nanoshaving two holes close to each other show a limit to the material "stripe" widths of an average of 153.

Distraction osteogenesis for craniomaxillofacial problems.

Distraction osteogenesis (DO) is a biological process involving the formation of new bone between viable bone segments that are gradually separated by incremental traction. This technology has proved useful in several craniomaxillofacial applications where conventional techniques were previously used. This article describes DO and demonstrates three disparate uses for this technology.