Effect of electrolyte concentration on morphological and photoluminescence properties of free standing porous anodic alumina membranes formed in oxalic acid

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dc.contributor.authorRamana Reddy, P.
dc.contributor.authorAjith, K.M.
dc.contributor.authorUdayashankar, N.K.
dc.date.accessioned2026-02-05T09:28:57Z
dc.date.issued2020
dc.description.abstractThe free-standing porous anodic alumina membranes (AAM) were prepared in oxalic acid by varying electrolyte concentration from 0.1 to 0.9 M with a constant potential of 40 V at 8 °C. The influence of electrolyte concentration on the morphological and optical features of AAM has been studied. Regularity ratio (RR) of AAM was measured using WSxM software, highest RR obtained for AAM formed in 0.3 M. From X-ray diffraction (XRD) analysis, it was found that prepared AAM were amorphous in nature. UV–Vis absorbance spectra reveal that absorbance bands slightly moves towards the higher wavelength side with increasing electrolyte concentration. Photoluminescence (PL) of AAM has been studied and related with RR of AAM. PL measurements of AAM exhibit strong PL peak in blue region, having a slight change with increasing electrolyte concentration. PL bands were originating from two kinds of oxygen-deficient defects (F and F+), their distributions were discussed on the basis of PL spectrum. © 2019 Elsevier Ltd
dc.identifier.citationMaterials Science in Semiconductor Processing, 2020, 106, , pp. -
dc.identifier.issn13698001
dc.identifier.urihttps://doi.org/10.1016/j.mssp.2019.104755
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/24078
dc.publisherElsevier Ltd
dc.subjectAlumina
dc.subjectAluminum oxide
dc.subjectAluminum sheet
dc.subjectOxalic acid
dc.subjectPhotoluminescence
dc.subjectX ray diffraction analysis
dc.subjectAbsorbance spectrum
dc.subjectAnodizations
dc.subjectElectrolyte concentration
dc.subjectOxygen-deficient defects
dc.subjectPhotoluminescence properties
dc.subjectPorous anodic alumina
dc.subjectPorous anodic alumina membranes
dc.subjectRegularity ratio
dc.subjectElectrolytes
dc.titleEffect of electrolyte concentration on morphological and photoluminescence properties of free standing porous anodic alumina membranes formed in oxalic acid

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