A separate page on the internal structure of carbon nanotubes, using specimens provided by Rodney Ruoff (then in Physics at Washington University) may be found here. Images of BN nanotubes provided by Washington University colleagues in Chemistry, and of single walled nanotubes provided by colleages in Electrical Engineering, will also be added below as time permits.
Here's a low mag image of aligned single walled nanotubes (inset shows one that has formed a loop) pulled from a silicon specimen prepared by Sanju Gupta at Southwest Missouri State University.
Nanocrystals of Pt on carbon nanotubes can be checked for epitaxial orientation by analyzing Pt fringe visibility as a function of position on the tube, as only suggested by this image of tubes provided by Chad Xing at University of Missouri - Rolla.
Plots from a 2005 poster on theory plus experimental work on this problem, with Jinfeng Wang at UM-StL, include the following example of what one might expect in various cases:
For specimens in the series below, thanks are due to colleages working with Richard Axelbaum in Mechanical Engineering at Washington University, with support from the U. S. Department of Energy and Environmental Protection Agency.
A single-walled nanotube, not much larger in diameter than a buckyball, located in our lab by WU graduate student C. Unrau.
A very thick coat around a very thin core, that doubles up at bottom right
Coated and uncoated nanotubes: zooming in
A coated nanotube in darkfield
Turbostratic graphene (atom-thick) layers, viewed thru a "non-lacey" carbon support
Can you locate pentagon/heptagon (concave inward/outward) defect-pairs in some layers?
