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Showing 1 to 20 of 53 for “"anodization"”.
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Breakdown Anodization (BDA) for hierarchical structures of titanium oxide
Breakdown Anodization (BDA) of titanium dioxide is a very promising, fast fabrication method to construct micro-scale and nano-scale structures on titanium surfaces. This method uses environmentally friendly electrolytes, such as nitric acid, and can be fabricated within 30 minutes regardless of …
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Nanopore/Nanotube Pattern Formation through Focused Ion Beam Guided Anodization
Anodization is a kind of method that can produce oxide layer in a large area and on flexible shaped metals. In some specific conditions, anodic oxide layers exhibit interesting nanopore/nanotube structures. In this work, focused ion beam patterning method is introduced to general anodization, …
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Titanium dioxide dielectric layers made by anodization of titanium: the effect of dissolved nitrogen and oxygen
… structure and properties of TiO2formed by anodization of nitrogen-and-oxygen-infused Ti substrates for electrolyticcapacitors. The controllable parameters of the diffusion process and the anodizationwere studied to evaluate the effect of nitrogen and oxygen dissolved in the Ti substrateon …
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Carbon fiber surface treatments for improved adhesion to thermoplastic polymers
The effect of anodization in NaOH, H₂SO₄, and amine salts on the surface chemistry of carbon fibers was examined by x-ray photoelectron spectroscopy (XPS). The surfaces of carbon fibers after anodization in NaOH and H₂SO₄ were examined by scanning transmission electron microscopy (STEM). angular …
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Anodic Metal Dissolution In Haloaluminate Molten Salts/Ionic Liquids
The anodization of Aluminium was investigated in the low-melting, mixed halide molten salt system, lialbr4-naalcl4-kalcl4 (30-50-20 m/o), and in the Lewis acidic Chloroaluminate ionic liquid, aluminum chloride-1-ethyl-3-methylimidazolium chloride (alcl3-etmeimcl) using rotating disk electrode …
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Model for porous alumina template formation
… based on underlying physics and chemistry of the anodization process is developed. The model developed unravels the interplay of various physical and chemical processes and their dependence on the process parameters such as the electrolyte, temperature, current and voltages and yields, an …
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Porous Silicon as Broadband Antireflector for Photovoltaic Application.
… silicon can be achieved by electrochemical anodization of silicon in hydrofluoric acid, but the main disadvantage is that HF is highly toxic and corrosive, which limits its use in industrial applications. So, there is a need for a cost-effective and non-toxic anodization technique to obtain …
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Porous anodic aluminum oxide scaffolds; formation mechanisms and applications
… deformation and flow of the oxide during further anodization. We demonstrate that these pore generation mechanisms can be controlled independently, even when they co-exist, by controlling the electric field across the oxide as well as the anodization conditions. We also show that mechanical …
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Growth of anodic alumina nanopores and titania nanotubes and their applications
… to create pre-patterned concaves to guide the anodization. Due to the advantage of FIB lithography, highly ordered AAO arrays with different arrangements, alternating diameters, and periodic pore densities are successfully achieved. Anodization window to fabricate ordered AAO is enlarged due to …
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GEOMETRY AND MORPHOLOGY OF TiO2 AND Fe2O3 NANOTUBES FOR SOLAR PHOTOLYSIS OF WATER
… water splitting. Sonoelectrochemical anodization technique in combination with a room temperature ionic liquid was utilized to synthesize concentric nanotubes. Nanotubes grown by this method had external diameters around 82 and 206 nm. Compared to similar single walled TiO2 nanotubes …
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Investigation of porous alumina as a self-assembled diffractive element to facilitate light trapping in thin film silicon solar cells
… is an attractive material because under certain anodization conditions, the pores form an ordered array. The ordered pore structure on the surface can serve as a diffraction grating, while alternating the pore size could vary the refractive index and form a distributed Bragg reflector. In this …
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Chromic acid anodized Ti-6Al-4V: its characterization and its single lap bond strength to heat resistant adhesives
… work was conducted to identify chromic acid (CA) anodization and bond process conditions which produced durable, structural anodized Ti-6Al-4V/heat resistant single lap bonds and to understand why these conditions were necessary. A structural single lap bond was defined as a bond tested at 298K ≤ …
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Synthesis and Characterization of Nanostructures in Porous Anodic Aluminum Oxide Templates
… alumina templates can be fabricated by two-step anodization. The pore diameters and interpore distances were readily controlled by appropriately changing anodization conditions and pore widening time. Alumina templates with various pore geometries were also successfully synthesized by changing …
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Structural and mechanistic studies of nickel-borate thin-film oxygen evolving electrocatalysts
… the OER. Catalytic activation is achieved by anodization of the as-deposited material in concentrated borate buffer, pH 9.2, a process which serves to oxidize the nickel centers to a mixed-valence Ni(II/IV) state. Extended X-ray absorption fine structure (EXAFS) spectroscopy studies indicate …
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Fabrication of nonlithographic semiconductor quantum wire infrared photodetector
… wire photodetectors using electrochemical anodization will be described.
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Electric field based fabrication methods for multi-scale structured surfaces
… electrophoretic deposition (EPD) and breakdown anodization (BDA) are examined for their potential to produce multi-scale structured surfaces. EPD uses electrophoresis to deposit thin films of nanoparticles, dispersed in suspension, onto charged or porous substrates. Depending upon the dispersion …
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Synthesis and characterization of TiO2 nanotube Schottky diodes
… ordered TiO2-NT arrays using electrochemical anodization as it offers precise geometric control over the NT growth. Fabrication parameters, such as anodization time, electrolyte concentrations, and annealing environments, were investigated until the resulting NTs were free from structural …
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Electrochemical fabrication of AuCo nanostructures
… Compared to conventional chemical etching, the anodization etching process presented here can be controlled to produce partially etched structures. The anodization process was monitored by two techniques. The current was recorded during etching and the total charge was proportional to the layer …
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Water based adhesive primers on aluminum substrates
… aluminum alloy was oxidized by phosphoric acid anodization prior to primer coating. The oxide layer thickness was controlled mainly by changing anodization voltage and directly measured using a HR-SEM (high resolution scanning electron microscope). The oxide layer was also examined by AES (Auger …
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Microstructural Control of Aluminum/aluminum Oxide Electrochemistry: Aluminum/aluminum Oxide Photonic Devices
… of modified electrochemical etching and anodization, is the first to be demonstrated. Intense luminance and luminous efficacies approaching 1800 cd/m2 and 4 lm/W, respectively, have been observed for 50 x 50 to 320 x 160 arrays of microplasma devices with parabolic cross-sectional …
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