List of records in nano database



Authors : Lambin,Ph.;Márk,G.,I.;Biró,L.,P.
Title : Structural and electronic properties of coiled and curled carbon nanotubes having a large number of pentagon�heptagon pairs
JournalName : Phys. Rev. B
PubDateYear : 2003
PubDateOther : 16 May
Volume : 67
Issue :
StartPage : 205413-1
EndPage : 205413-9
Keywords : TOP_YandCoil;W_Experiment;W_Theory;W_Coil;W_Nanotube;W_STM;W_Haeckelite
Notes :
Abstract : A family of Haeckelite nanotubes is generated by rolling up a two-dimensional threefold coordinated carbon network composed of pentagon-heptagon pairs and hexagons in proportion 2:3. The corresponding two dimensional network is highly strained due to the presence of adjacent pentagons and heptagons. When the sheet is folded into a cylinder, part of the strain is released by having the pentagons protrude outward, and sometimes inward the tube. Due to that property, a large variety of structures can be generated such as coiled, screwlike, curled, and pearl-necklace-like nanotubes. All the Haeckelite nanotubes obtained in this work are semiconductors, some having a small band gap. Scanning-tunneling microscopy images, computed for a few Haeckelite nanotubes, show salient topographic protrusions at the location of the pentagon pairs.
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