Preparation of coronene nanowires and its properties

- Optical characterization of coronene nanowires.
- Spectrophotometric measurements of transmittance and reflectance.
- The optical and transport energy band gaps.
- Variation of dielectric constant with photon energy.

In this study we have deposited coronene nanowires onto glass substrates with thicknesses of 80 nm by means of Physical Vapor Deposition (PVD) method and investigated the optical properties of these films. Several parameters such as absorption coefficient, optical and transport band gap, energy of the exciton, real and imaginary dielectric constant and refractive index of the films have been determined using spectrophotometric measurements of transmittance and reflectance. The optical transmittance of the coronene film has been estimated as of 70-90% in the visible range. The optical and transport energy band gaps have been found to be 3.2 and 3.5 eV, respectively. The real dielectric constant and the dielectric loss tangent have significantly increased with photon energy.

Based on dispersion parameters and band gap of coronene nanowires coronene nanocrystals are a good nominee for photon energy applications.50