Synthesis and Morphological Characterization of Nanoporous Aluminum Oxide Films by Using a Single Anodization Step
| Autor: | Alicia Esther Ares, Maria Laura Vera, Gustavo Raul Kramer, Florencia Alejandra Bruera |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Scanning electron microscope Alloy nanostructured coatings 02 engineering and technology Electrolyte INGENIERÍAS Y TECNOLOGÍAS engineering.material 010402 general chemistry 01 natural sciences ANODIC OXIDATION law.invention Optical microscope Coating law purl.org/becyt/ford/2.10 [https] Materials Chemistry AA 1050 Nanotecnología Nanoporous Anodizing anodic oxidation Surfaces and Interfaces 021001 nanoscience & nanotechnology Nano-materiales ONE-STEP ANODIZATION 0104 chemical sciences Surfaces Coatings and Films Anode NANOSTRUCTURED COATINGS Chemical engineering purl.org/becyt/ford/2 [https] lcsh:TA1-2040 engineering one-step anodization lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology |
| Zdroj: | Coatings Volume 9 Issue 2 CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET Coatings, Vol 9, Iss 2, p 115 (2019) |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings9020115 |
| Popis: | Nanoporous anodic aluminum oxide (AAO) films play an important role in nanotechnology due to their easily adjustable morphological properties and wide range of applications. Thus, a deep and systematic characterization of the morphological properties of these coatings is essential. The most important variables in the synthesis of nanoporous AAO films include the anodization voltage, nature, concentration and temperature of the electrolyte, which, combined, result in pores of different sizes and geometries. In the present work, AA 1050 alloy was used to synthesize AAO films, using 0.3 and 0.9 M oxalic acid as the electrolyte and combining different electrolyte temperatures (20, 30 and 40 ° C) and anodizing voltages (30, 40 and 60 V), with the aim to correlate the morphological properties of the coatings with the synthesis parameters of a single anodization step. The coatings obtained were characterized by optical microscopy and scanning electron microscopy, determining pore diameter, interpore distance, pore density and coating thickness. The results showed that, by varying the anodic synthesis conditions, it is possible to obtain coatings with a pore diameter between 21 and 97 nm, an interpore distance between 59 and 138 nm, pore density between 2.8 × 1010 and 5.4 × 109 pores/cm2 and thicknesses between 15 and 145 µ m. In this way, the right combination of synthesis variables allows synthesizing AAO coatings with morphological characteristics best suited to each particular application. |
| Databáze: | OpenAIRE |
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