compute_Lz

sknano.core.structures.compute_Lz(*Ch, nz=1, bond=None, **kwargs)

Compute the axis-aligned length along the z-axis in Angstroms.

$L_z = L_{\mathrm{tube}}$ in Angstroms.

Changed in version 0.4.0: Changed units from nanometers to Angstroms

$$L_z = n_z |\mathbf{T}|$$

Parameters:

• *Ch –

  Either a 2-tuple of ints or 2 integers giving the chiral indices of the nanotube chiral vector $\mathbf{C}_h = n\mathbf{a}_1 + m\mathbf{a}_2 = (n, m)$.

• nz ({int, float}) – Number of nanotube unit cells
• bond (float, optional) – Distance between nearest neighbor atoms (i.e., bond length). Must be in units of Å. Default value is the carbon-carbon bond length in graphite, approximately $\mathrm{a}_{\mathrm{CC}} = 1.42$ Å

Returns:

$L_z = L_{\mathrm{tube}}$ in Angstroms

Return type:

float