Significantly Enhanced Single-Walled Carbon Nanotube Dispersion Stability in Mixed Solvent Systems

Dimethyl formamide as Dispersing Agent for Electrophoretically Deposited of Multi-Walled Carbon Nanotubes

“…The settling time of MWCNTs in mixture of acetone and ethanol is the fastest with the UV-Vis reading at 0.21 to 0.01A within 30 minutes after sonication.NMP is mostly applied in dispersing single-walled carbon Nanotubes (SWCNT) as it is reported to enable the control of SWCNT suspension. 12,14 However, combination of NMP with MWCNTs as seen in the graph, the UV-Vis reading for NMP is initially at 3.00A dropped by 55% after 14 days. According to the report by Riddick 15 in Figure 2, when the potential is small, attractive forces may exceed this repulsion and the dispersion may break and flocculate.…”

“…[7][8][9] Various solvents were tested for MWCNTs dispersion such as organic solvent (mixture of acetone and ethanol and N-methyl-2-pyrrolidone (NMP) and dimethyl formamide (DMF)), polar solvent (distilled water) and surfactant. [10][11][12] The suitable solvent is selected based on solvent type, suspension stability, zeta potential reading and performance for EPD. The aim for this research is to select the most suitable solvent for dispersion and deposition of MWCNTs on nickel substrate using EPD method.…”

Adsorption studies of divalent, dinuclear coordination complexes as molecular spacers on SWCNTs

“…13 Essentially, we measure the onset of aggregation as we increase the concentration of coordination complex, change the charge on the complex, and vary the nuclearity of the complexes bound to the SWCNTs. 13,33,34 Dispersion stability is also affected by the degree of dissociation of +2Zn2 in DMF. These data are shown in Fig.…”

Formulation of concentrated and stable ink of silver nanowires with applications in transparent conductive films

“…Mixed solvents based on NMP have been explored to effectively enhance the stability of the pristine single-walled carbon nanotubes (SWCNT) dispersion through tuning solubility parameters of nal solvent, which has been theoretically analyzed in quantity combining DLVO theory, Flory-Huggins theory and Hildebrand/Hansen solubility parameters. 15 Besides NMP, organic solvents of EG and others have been identied to form graphene oxide (GO) dispersions with long-term stability, 16 probably due to large dipole moment (3.75 for NMP and 2.31 for EG) and suitable Hildebrand/Hansen solubility parameter. 17 EG has also been employed in exible electronics as the humectant in stabilizing the ink of AgNWs.…”