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Photochemically synthesized cobalt oxide hydroxide (PCOH) under UV light has been successfully achieved without the addition of surfactants, templates, or organic solvents at ambient temperatures. PCOH samples can be converted to spinel cobalt oxide (PCO) after the calcination at 500°C. The in-situ growth of hierarchical nanostructures was demonstrated with a three-stage mechanism in the photochemical...
Self-ordered periodic porous alumina with an undiscovered cell diameter was fabricated via electrochemical anodizing in a new electrolyte, phosphonic acid (H3PO3). High-purity aluminum plates were anodized in phosphonic acid solution under various operating conditions of voltage, temperature, concentration, and anodizing time. Phosphonic acid anodizing at 150–180V caused the self-ordering behavior...
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