Ultraviolet to far-infrared transmission properties of thin film multi-walled carbon nanotube random networks

• DOI: 10.1007/s10853-016-0596-y
• Publication Date: 2016-11-28T11:58:21Z
• Authors: M. Wąsik; A. Dużyńska; J. Judek; M. Pawłowski; K. Świtkowski; A. M. Witowski; M. Zdrojek
• Keywords: Ultraviolet

Thin films of multi-walled carbon nanotubes forming random networks were produced by vacuum filtration method, and their broadband electromagnetic radiation transmittance spectra are presented. Thickness the nanotube was between 100 nm 1 μm, transmission properties demonstrated for wavelength range from 300 to 400 μm. It is observed that an increasing function a wavelength, thickest it almost saturates above μm wavelength. To explain experimental results in ultraviolet–near infrared range, we employed effective medium theory (in form symmetric Bruggeman model) correlating with dielectric network. The optical single used calculations based on ordinary extraordinary functions bulk graphite. proposed theoretical model has been successfully fitted results. also found despite fact undergoes multiple internal reflections at film interfaces, transmittance–thickness relation can be still described exponential decay.