Abstract :
Organic molecules and inorganic nanoparticles were incorporated into transparent and conductive single- or double-wall carbon nanotube (SWNT or DWNT) films, and their electrical and optical properties were measured. When organic tetrafluoro-tetracyanoquinodimethane (F4TCNQ) molecules were incorporated into the nanotube films, sheet resistance was reduced to ∼50% of those from the pristine SWNT and DWNT films. Larger improvements were observed with Au nanoparticle decoration or HNO3/SOCl2 dipping processes. The sheet resistances were measured to be 42 Ω / sq at 75% of transmittance for HNO3/SOCl2-treated DWNT films and 64 Ω / sq at 77% for Au-incorporated DWNT films, making their electrical conductivities 200%–300% better than those of the pristine DWNT films. It was observed that DWNTs have better electrical/optical performance than SWNTs. The relative influence of various dopants, F4TCNQ, Au, and HNO3/SOCl2 as well as microwave irradiation on the optical and electrical properties was identified by using Raman and UV-vis-NIR spectra.
