NANOTUBE WALL WIDTH
Vibrating nanotubes make NEMS (Nano-Electro-Mechanical Sensors) to
weigh molecules such as DNA.
Challenging aspect of vibrating nanotube systems is the value of h, the nanotube wall width.
How does it vary under local strain in the tube
bending. Exaggerated image of a vibrating tube, showing
the strained bonds in red is shown at left.
Width needed to calculate the mass from the measured frequency,
Very controversial for a long time - plays a r\'ole in Yakobson's paradox about a nanotube's Young's modulus. In two papers by Adler, Pine, Yaish h=0.06nm. (Two distinct analysis approaches to data from multiple
simulations.) Until now, direct confirmation was not made.