Sonochemical Optimization of the Conductivity of Single Wall Carbon Nanotube Networks

Abstract

Networks of single‐wall carbon nanotubes (SWCNTs) are covalently functionalized with oxygen‐containing groups. In lower concentration, these functional groups act as stable dopands improving the conductivity of the SWCNT material. In higher concentration however, their role as defects with a certain scattering potential becomes dominant, decreasing the conductivity of the CNT material. These effects lead to a trade‐off in the number of functional groups which has been investigated using time‐dependent sonochemistry.

Recent progress in carbon nanotube-based flexible transparent conducting film

“…Furthermore, after 50 minutes, the SWCNTs were further doped with nitric acid, again evidenced by the slight increase of the S 11 peak. This phenomenon is consistent with that of SWCNT networks by nitric acid treatment in ultrasonication, although the maximum conductivity occurred slowly in our work [25] . Nevertheless, some defects were generated as a result of the attack of nitrides [25] so that the resonance effect became obscured.…”

Chemically Derived Graphene Oxide: Towards Large‐Area Thin‐Film Electronics and Optoelectronics

“…Doping can occur by chemisorption or physisorption of molecules, [22,41,65,177,233] ions, [223] functional groups, [234] metals particles, [235] or ionic liquid. [236] The transfer characteristics resulting from unintentional doping effects from oxygen and water vapor in the ambient are shown in Figure 16a.…”

An experimental study on thermal characteristics of nanofluid with graphene and multi-wall carbon nanotubes

“…Ultrasonication served to impart enough energy to separate the nanoparticles from each other long enough for surfactant to surround the nanoparticles and prevent them from agglomerating [32]. Since excessive sonication causes defect in CNTs [33], the ultrasonication time for both GN and MWCNTs was 20 min. Later, 40 min ultrasonication was performed for GN-SDS nanofluid.…”