Oxide composition studies of electrochemically grown tantalum oxide on sintered tantalum using XPS depth-profiling and co-relation with leakage properties

Properties and Application of Electrochemically Anodized Ta2O5 Nanostructures: A Review

“…Similar to other metal oxides, Ta2O5 has polymorphic transformation of about 10-15 which has been reported until this date and can be identified by XRD [37], [57]. As-anodized structures are primarily amorphous and require postheat treatment to transform into a crystalline structure.…”

“…The reason why Ta2O5 is one of the best candidates for the optic-based sensor is that it exhibits high refractive index material which might enhance the sensitivity of the sensor [21], [57], [68], [69]. The presence of defects level and oxygen vacancy on its surface has aided in productive interaction by quickly adsorbing analyte molecules in the sensing surface [71].…”

“…Ta2O5 nanostructures exhibit quite promising properties to provide wide surface area and magnificent charge transport and separation. Due to its optical properties which exert a high refractive index, Ta2O5 has become a good candidate for photocatalytic application [57], [69]. Several studies have been reported regarding the implementation of Ta2O5 related to photocatalytic activity.…”

Review of Anodic Tantalum Oxide Nanostructures: From Morphological Design to Emerging Applications

“…The composition and concentration of anodizing electrolytes significantly affect the morphology of ATO layers. − Electrolytes used for anodization of Ta can be broadly classified into three categories: (i) inorganic including, e.g., H 2 SO 4 , Na 2 SO 4 , H 3 PO 4 , HCl, NaBF 4 , H 2 CrO 4 , etc., (ii) organic acids, such as citric acid, oxalic acid, acetic acid, and (iii) mixtures of inorganic and organic electrolytes. − Earlier studies on anodization of Ta in two component electrolytes, e.g., H 2 SO 4 , Na 2 SO 4 , H 3 PO 4 , HCl, NaBF 4 , chromic acid, citric acid, etc. in water, resulted in the formation of a compact or barrier type oxide layer with the thicknesses of few nm. ,,−…”

“…The size, morphology, crystallinity, and impurity content of ATO or ATO-derived materials can significantly influence their physicochemical properties. ,− ,,,,,,,,,,,,,− Although ATO-based capacitors have been investigated since the 1980s/1990s, ,, in the last two decades, efforts have also been made to explore the potential of ATO-based materials in the fields of memristive devices, photocatalysis, electrocatalysis, corrosion resistant coatings, and biomedical applications. ,,,,,,,,,,,− In this section, we summarize some notable physiochemical properties and applications of ATOs or their derived materials.…”