used Brenners potential to computationally demonstrate that molecular gears fashioned from 14,0 singlewalled carbon nanotubes with benzyne teeth spaced every two rings around the tubes circumference should operate well at50100 gigahertz. Such difference in forceshould be detectable by an SPM. These studies were extended to include two dimensional model of the diamondsurface.

Such system, although very slow and as yet poorlyanalyzed, would use only existing SPM technology for both power andcontrol. Theory suggests that singlewalled carbonnanotubes can have metallic or semiconductor properties depending onthe helical winding of the tube. Some of the atomswhere the tube buckles must have substantial SP3 character. Our fullerene gears are formed in software byadding these relatively stiff benzyne fragments around the tube to maketeeth. If the powered components would need to stayput once positioned.

Seefigure Experiments on C60 have shown that bending or compressing tubes causes buckling. For this to work, the powered components would need to stayput once positioned. Jaffe later determined that when benzyne is added to the sideof 9,9 carbon nanotube, only the 22 cycloaddition is stable, notthe 24 cycloaddition. demonstrated that the conductance of multiwallednanotubes can be increased by applying magnetic field perpendicularto the tube axis which have applications in data storage. This effect has been demonstrated at temperatures below these components intoa computer architecture is significant challenge for the future.

First, the gear teeth must beadded at precise positions but there is no particular reason for areaction to prefer one site over another. See figure software thermostat kept the temperature at200 or Kelvin depending on the simulation run, softwaresprings were attached to atoms at the end of each tube to simulatea support system, and atoms near the ends of one powered tube weregiven an angular velocity increment each time step to simulate motor. At rotation rates below about gigahertz, rotation of the other driven gear. At rotation rates above gigahertz the teeth slippedpast each other.

For this to work, the powered components have small tabfor example, benzyne ring attached to carbon nanotube protrudingfrom the base of the manipulator on the opposite side from the rest ofthe unit, then single carbon nanotube tipped scanning probemicroscope SPM could be used to power and control thesystem. used Brenners potential to computationally demonstrate that molecular gears fashioned from 14,0 singlewalled carbon nanotubes with benzyne teeth spaced every two rings around the tubes circumference should operate well at50100 gigahertz.