Effect of various de-anodizing techniques on the surface stability of non-colored and colored nanoporous AAO films in acidic solution

Characterization of electrodeposited undoped and doped thin ZnO passive films on zinc metal in alkaline HCO3−/CO32− buffer solution

“…The model consists of two parallel time constants in series with the solution resistance ( R s ) between the reference and working electrode. 32 In this adopted electronic model ( Fig. 2c inset) the first time constant parallel combination ( R 1 C 1 ) is linked to the system behavior at the low LF region which comes from the resistance and capacitance effects due to the inner barrier oxide layer.…”

“…On the other hand, the second time constant is the parallel combination ( R 2 C 2 ) describing the behavior in the MF to HF region of the charge transfer resistance and the capacitance at the outer oxide layer/solution interface. 32,33 This explanation is based on the well-established notion that passive film formed on zinc normally is bi-layer structure comprising an inner barrier layer in direct contact to the metal substrate covered by an outermost layer facing the solution. 9 In order to modify the suggested EC model due to non-ideal behavior, a constant phase element (CPE) had replaced the pure capacitor ( C 2 ) in real electrochemical process.…”

New Trends in Anodizing and Electrolytic Coloring of Metals

“…9(2022) anodized samples controlled by pore size and filling factor of pores. Etching with phosphoric acid show the lowest stability due to thickness of its outer layer being highest which lead to increased filling factor by metallic nano-copper make the sample more susceptible to galvanic corrosion [30]. Comparing between performances 'AAO' film fabricated by different successive steps electrolytic polished, 1 st anodization, 2 nd anodization and electrodeposited copper in aggressive media of sulphuric acid with respect to base Al metal were studied [31].…”

Tunable Magneto-Optical Kerr Effects of Nanoporous Thin Films

“…This is proposed to cause repulsive forces between the neighboring pores 75 . The porous film is a useful template in the fabrication of devices 76 (e.g., photoelectronic device 77 and nanoparticle assemblies 78 whose interfacial interaction can be regulated by the AAO structure, such as pore size, membrane thickness and surface morphologies) and various functional nanostructures 79 – 82 (e.g., solar cells 83 , nanotubes 84 – 86 , nanofibers 86 , catalysts 87 – 89 , and metal nanowires 90 ). To date, the AAO porous film also has a wide applications in ultrafiltration 91 , biosensors 92 – 94 , photonics 95 , 96 , masking 97 and information storage 98 .…”