Ta2O5 and Ta2O5 – Al2O3 – SiO2 (Ta:Al:Si = 8:1:1 atomic ratio) thin films were prepared by Chemical Solution Deposition at temperatures not exceeding 400 °C. The thin films were XRD-amorphous and had flat surfaces (RMS ( 0.3 nm). All samples showed high optical transparency in the visible range. Long lasting current transients were recorded in the Ta2O5-based films under a constant applied electric field which proved to depend on the thermal budget. The current-voltage measurements revealed that the leakage currents for the investigated samples increase with the heating temperature. As compared to the pure Ta2O5 thin films, the samples with the mixed composition showed lower leakage within the investigated temperature range.
COBISS.SI-ID: 26117671
The paper describes a protocol for processing cost-beneficial, environmentally benign aqueous-type suspensions containing metal-oxide nanostructured particles, and their patterning with piezoelectric ink-jet printing technology. The critical issues relevant to ink-jet printing are the preparation and stabilization of nanosized particles in a fluid and adjusting its physical properties to the values appropriate for a particular ink-jet printer mechanism. For the ink-jet printing experiments of a model titania system, the surface tension and the viscosity of the suspension were modified by the addition of a small amount of the appropriate non-ionic amphiphiles and glycerol. The printing parameters which allowed reproduucible patterning of 2D-structures were determined.
COBISS.SI-ID: 25158439