The Effect of Anodizing Bath Composition on the Electronic Properties of Anodic Ta-Nb Mixed Oxides
Anodic oxides were grown to 50 V on Ta-Nb sputtering deposited alloys, with high Nb content, in acetate ions containing an aqueous solution to study the effect of the anodizing bath composition on anodic layers’ dielectric properties. Photoelectrochemical measurements proved the presence of a photoc...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/24/4439 |
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| author | Giada Tranchida Andrea Zaffora Francesco Di Franco Monica Santamaria |
| author_facet | Giada Tranchida Andrea Zaffora Francesco Di Franco Monica Santamaria |
| author_sort | Giada Tranchida |
| collection | DOAJ |
| description | Anodic oxides were grown to 50 V on Ta-Nb sputtering deposited alloys, with high Nb content, in acetate ions containing an aqueous solution to study the effect of the anodizing bath composition on anodic layers’ dielectric properties. Photoelectrochemical measurements proved the presence of a photocurrent in the band gap of photon energy lower than oxides, due to optical transitions involving localized electronic states as a consequence of acetate ions incorporation. Flat band potential value estimates assessed the insulating nature of the anodic oxides grown in the acetate buffer solution. Differential capacitance measurements showed that the highest capacitance value was measured for the sample grown on Ta-66%Nb. This capacitance value was higher with respect to those estimated for pure Ta and pure Nb anodic layers and with respect to the same alloy anodized in NaOH solution, i.e., acetate-free anodizing bath. |
| first_indexed | 2024-03-09T16:01:09Z |
| format | Article |
| id | doaj.art-3cb4d0a4e3964ecea1cfaa691d016aba |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T16:01:09Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-3cb4d0a4e3964ecea1cfaa691d016aba2023-11-24T17:04:23ZengMDPI AGNanomaterials2079-49912022-12-011224443910.3390/nano12244439The Effect of Anodizing Bath Composition on the Electronic Properties of Anodic Ta-Nb Mixed OxidesGiada Tranchida0Andrea Zaffora1Francesco Di Franco2Monica Santamaria3Department of Engineering, University of Palermo, Viale delle Scienze, 90128 Palermo, ItalyDepartment of Engineering, University of Palermo, Viale delle Scienze, 90128 Palermo, ItalyDepartment of Engineering, University of Palermo, Viale delle Scienze, 90128 Palermo, ItalyDepartment of Engineering, University of Palermo, Viale delle Scienze, 90128 Palermo, ItalyAnodic oxides were grown to 50 V on Ta-Nb sputtering deposited alloys, with high Nb content, in acetate ions containing an aqueous solution to study the effect of the anodizing bath composition on anodic layers’ dielectric properties. Photoelectrochemical measurements proved the presence of a photocurrent in the band gap of photon energy lower than oxides, due to optical transitions involving localized electronic states as a consequence of acetate ions incorporation. Flat band potential value estimates assessed the insulating nature of the anodic oxides grown in the acetate buffer solution. Differential capacitance measurements showed that the highest capacitance value was measured for the sample grown on Ta-66%Nb. This capacitance value was higher with respect to those estimated for pure Ta and pure Nb anodic layers and with respect to the same alloy anodized in NaOH solution, i.e., acetate-free anodizing bath.https://www.mdpi.com/2079-4991/12/24/4439anodizingcapacitanceelectrolytic capacitorsmixed oxidesTa oxideNb oxide |
| spellingShingle | Giada Tranchida Andrea Zaffora Francesco Di Franco Monica Santamaria The Effect of Anodizing Bath Composition on the Electronic Properties of Anodic Ta-Nb Mixed Oxides Nanomaterials anodizing capacitance electrolytic capacitors mixed oxides Ta oxide Nb oxide |
| title | The Effect of Anodizing Bath Composition on the Electronic Properties of Anodic Ta-Nb Mixed Oxides |
| title_full | The Effect of Anodizing Bath Composition on the Electronic Properties of Anodic Ta-Nb Mixed Oxides |
| title_fullStr | The Effect of Anodizing Bath Composition on the Electronic Properties of Anodic Ta-Nb Mixed Oxides |
| title_full_unstemmed | The Effect of Anodizing Bath Composition on the Electronic Properties of Anodic Ta-Nb Mixed Oxides |
| title_short | The Effect of Anodizing Bath Composition on the Electronic Properties of Anodic Ta-Nb Mixed Oxides |
| title_sort | effect of anodizing bath composition on the electronic properties of anodic ta nb mixed oxides |
| topic | anodizing capacitance electrolytic capacitors mixed oxides Ta oxide Nb oxide |
| url | https://www.mdpi.com/2079-4991/12/24/4439 |
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