id	keyword
ejpam-6935	sr =
ejpam-6935	ϕ1 =
ejpam-6935	γ1 =
ejpam-6935	e1 =
ejpam-6935	carbon
ejpam-6935	nanotubes
ejpam-6935	carbon nanotubes
ejpam-6935	wall
ejpam-6935	wall carbon
ejpam-6935	h =
ejpam-6935	-0.6832
ejpam-6935	mwcnt
ejpam-6935	lines
ejpam-6935	multi
ejpam-6935	−ϑ′(0
ejpam-6935	φ(υ