Carbon Nanotube Transmission between Linear and Rotational Motions
Hanqing Jiang; Junqiang Lu; Min-Feng Yu; Yonggang Huang

Source CMES: Computer Modeling in Engineering & Sciences, Vol. 24, No. 2, pp. 95-102, 2008
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Keywords Double-walled carbon nanotubes; telescoping; rotational motion; electrical conductance
Abstract The periodic lattice registry of multi-walled carbon nanotubes (MWCNTs) have been exploited for the possibilities of development of nanodevices. This paper studied the telescoping behaviors of double-walled carbon nanotubes (DWCNTs) by atomic-scale finite element and tight-bind Green function methods. It was found that telescoping a DWCNT (e.g., (6,3)/(12,6)) will induce a rotational motion of the inner CNT that has a chirl angle \textit {$\theta$} ($0^\circ<\theta><30^\circ )$.="" this="" telescoping-induced="" rotational="" motion="" does="" not="" exist="" for="" armchair="" and="" zigzag="" dwcnts="" due="" to="" the="" symmetry="" of="" cnts.="" the="" rotational="" angle="" is="" completely="" determined="" by="" the="" chirality="" of="" the="" inner="" cnt="" and="" can="" be="" intuitively="" explained="" by="" screw/nut="" model.="" the="" study="" of="" transportation="" property="" of="" (6,3)/(12,6)="" dwcnt="" shows="" a="" periodic="" variation="" of="" electrical="" conductance="" with="" telescope="" distance.="" the="" period="" is="" determined="" by="" the="" lattice="" constant="" of="" graphene="" (0.246="" nm)="" and="" chirality="" of="" the="" inner="" cnt.="" the="" unique="" linear/rotational="" motions="" transmission="" and="" periodic="" variation="" of="" electrical="" conductance="" present="" fascinating="" opportunities="" for="" the="" engineering="" of="" a="" new="" class="" of="" nanometrology="" devices,="" namely,="" rotational="" and="" distance="">
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