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Full-Text Articles in Social and Behavioral Sciences
Synthesis, Properties, Water And Solute Permeability Of Mwnt Buckypapers, Md. Harun-Or Rashid, Son Q. T Pham, Luke J. Sweetman, Leighton J. Alcock, Anthony Wise, Long D. Nghiem, Gerry Triani, Marc In Het Panhuis, Stephen F. Ralph
Synthesis, Properties, Water And Solute Permeability Of Mwnt Buckypapers, Md. Harun-Or Rashid, Son Q. T Pham, Luke J. Sweetman, Leighton J. Alcock, Anthony Wise, Long D. Nghiem, Gerry Triani, Marc In Het Panhuis, Stephen F. Ralph
Faculty of Science, Medicine and Health - Papers: part A
High power tip sonication was used to prepare dispersions containing multi-walled carbon nanotubes (MWNTs), or multi-walled carbon nanotubes functionalised with carboxylic acid groups (MWNT-COOH) or amine groups (MWNT-NH2). The dispersion of carbon nanotubes was facilitated by the presence of a surfactant (Triton X-100) or various macrocyclic ligands (derivatised porphyrin, phthalocyanine or calixarene) in the solution. Vacuum filtration of the dispersions afforded self-supporting membranes known as buckypapers. Microanalysis provided evidence for retention of the surfactant or macrocyclic ligands in the buckypapers, which were also characterised by measurement of their electrical conductivities (24±16 to 58±11 S/cm), contact angles (28±1° to 55±10°) and …
Electrical Conductivity, Impedance, And Percolation Behavior Of Carbon Nanofiber And Carbon Nanotube Containing Gellan Gum Hydrogels, Holly Warren, Reece Gately, Peter O'Brien, Robert Gorkin Iii, Marc In Het Panhuis
Electrical Conductivity, Impedance, And Percolation Behavior Of Carbon Nanofiber And Carbon Nanotube Containing Gellan Gum Hydrogels, Holly Warren, Reece Gately, Peter O'Brien, Robert Gorkin Iii, Marc In Het Panhuis
Faculty of Science, Medicine and Health - Papers: part A
The electrical impedance behavior of gellan gum (GG), GG-carbon nanotube, and GG-carbon nanofiber hydrogel composites is reported. It is demonstrated that the impedance behavior of these gels can be modeled using a Warburg element in series with a resistor. Sonolysis (required to disperse the carbon fillers) does not affect GG hydrogel electrical conductivity (1.2 ± 0.1 mS/cm), but has a detrimental effect on the gel's mechanical characteristics. It was found that the electrical conductivity (evaluated using impedance analysis) increases with increasing volume fraction of the carbon fillers and decreasing water content. For example, carbon nanotube containing hydrogels exhibited a six- …