Q2. How do the authors calculate surface GF elements of semi-infinite nanotubes?
In order to calculate surface GF elements of semiinfinite nanotubes, the authors apply efficient recursion methods, which are numerically stable and computationally inexpensive.
Q3. What is the promising material for the construction of large scale flexible electronic displays?
In particular, thin metallic films are currently the most promising material to enable the construction of large scale flexible electronic displays [2–4].
Q4. What can be used to describe the electronic structure of a carbon nanotube?
standard Green function methods can be used to describe the electronic structure and electronic transport characteristics across the nanotube networks.
Q5. What is the way to describe the electronic structure of carbon nanotubes?
Tight binding model Hamiltonians are a very efficient and convenient way to describe electronic structure of materials in general, and are well suited to deal with carbon nanotubes.
Q6. What is the simplest formula to calculate the conductance of a system?
The zero-bias conductance of the system is calculated with the Kubo formula, which provides a simple expression for the conductance by calculating the net electronic current across a reference plane in the system, often referred to as the cleavage plane, which is located between any two parts of the system.
Q7. How many configurations can be generated by randomly distributing rods?
For a fixed number of rods, and a box of fixed dimensions, a very large number of configurations can be generated by randomly distributing the rods.
Q8. How can the authors calculate the resistance between arbitrary nodes of any resistive structure?
by constructing the appropriate matrix M, it is possible to calculate the resistance between arbitrary nodes of any resistive structure, all that is required is to describe the matrix M according to the specific network connectivity.
Q9. How can the authors calculate the conductance of ideal network films?
By neglecting all sources of decoherence-inducing scattering, it is possible to calculate the conductance of ideal network films.
Q10. How is the resistance measured between the electrodes?
In experimental realisations, metallic electrodes are placed at opposing ends of a film and the resistance is measured between these electrodes in a usual two probe method.
Q11. What is the effect of the orbital degeneracy on the conductivity of nanotube?
In order to compare the results with carbon nanotubes, an orbital degeneracy is introduced in the chain Hamiltonian such that there are two independent conducting channels.
Q12. How can the authors approach electronic transport problems from an atomistic perspective?
It is also possible to approach electronic transport problems from an atomistic viewpoint, most notably by means of ab-initio density functional theory calculations (DFT) coupled with non-equilibrium Green function methods [20, 21].
Q13. What is the value of the potential difference between the two arbitrary points of the network?
from V one calculates the potential difference across every resistor in the network, which provides a direct way of calculating the equivalent resistance between any two arbitrary points of the network.
Q14. How is the volume fraction of a typical laboratory produced nanotube film calculated?
The volume fraction of a typical laboratory produced nanotube film is related to the volume of CNT solution used for deposition [5, 6], and can be directly measured.
Q15. How can the electronic structure of a carbon nanotube be described?
On the microscopic scale, the electronic structure of a carbon nanotube can be satisfactorily described by simple model Hamiltonians.
Q16. How many connections per rod in a random network was found to scale universally?
The average number of connections per rod in a random network was found to scale universally with a combined variable given by the product of the volume fraction with the aspect ratio of the individual rods considered.
Q17. What is the upper bound for the conductivity of carbon nanotubes?
Bearing in mind that the upper bound here obtained assumes a number of ideal conditions that are experimentally unavoidable, this might be a clear indication that the authors are approaching a saturation point in the conductivity of nanotube network films.