The effect of substrate pore size on the network interconnectivity and electrical properties of dropcasted multiwalled carbon nanotube thin films

摘要: Four-layer multiwalled carbon nanotube (MWNT) thin films were deposited via dropcasting (1 mg/mL MWNTs and 10 SDBS) onto filter papers that vary in pore size (1, 5, 25, 40 µm) to determine the effect of underlying substrate structure on in-plane properties films. The (<100 nm thick) dried using vacuum filtration, drying a 65 °C heater with without ceramic heating board. DC resistance ranged from 6 × 103 9.3 109 Ω. Impedance spectroscopy analysis revealed low high frequency inductive response two parallel R–C circuits for more conducting High fit by single RC circuit constant-phase element. differences electrical responses different MWNT can be explained degree surface coverage, obtained as result papers. method utilized also affected CNT network formation its resultant properties.