Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
Browse
2 results
Search Results
Item Effect of pore widening time on the structural aspects of self-organized nanopore arrays formed by anodization of aluminum in chromic acid(Elsevier Ltd, 2016) Suchitra, S.M.; Ramana Reddy, P.; Udayashankar, N.K.Anodic aluminium oxide (AAO) membranes were prepared by two-step anodization of aluminum formed in 0.3M chromic acid at the ambient temperature of ~ 30° C with anodization potential of 50 V. The radial average fast Fourier transform based study of nanopores has been carried out. The duration of the pore widening was varied from 0min to 60min in steps of 15 minutes. The effect of the pore widening time on the structural parameters of porous anodic alumina such as pore diameter (Dp), interpore distance (Dc), porosity (P) and pore density (n) were studied. It was observed that pore diameter and porosity increased with increasing pore widening time. Highly ordered and better nanopore array of AAO membrane was obtained for the sample anodized in chromic acid with 60 min pore widening time. © 2016 Elsevier Ltd.Item Structural and wetting properties of porous anodic alumina templates prepared by different electrolytes(American Institute of Physics Inc. subs@aip.org, 2016) Suchitra, S.M.; Ramana Reddy, P.R.; Udayashankar, N.K.Porous anodic alumina (PAA) has been extensively studied in recent years due to their unique properties and applications for manufacturing nanostructured materials. In this article, we report our studies on structural and wetting properties of PAA membranes prepared using different electrolytes such as sulphuric, oxalic and phosphoric acids. The morphological parameters such as pore diameter and porosity were measured using SEM and analysed using image-J software. The structural investigation of PAA membranes was carried out through X-ray diffraction analysis and it was confirmed that PAA membranes were amorphous in nature. The wetting behaviour of PAA membranes were measured using contact angle measurement technique. The results show that PAA membranes were hydrophilic in nature with contact angles 26.03°, 35.21° and 42.0° for sulphuric, oxalic and phosphoric acids respectively. © 2016 Author(s).