Transparent sapphire substrates with tunable optical properties by decorating with nanometric oxide on porous anodic aluminum oxide patterns

Hun, Chien-Wan; Chang, Chuan-Chan; Chen, Shih-Hsun; Chen, Chien Chon; Fang, Alexander W.; Kuo, Yu‐Lin

doi:10.1016/j.ceramint.2018.03.145

Cited by 5 publications

(1 citation statement)

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“…Although, synthesizing the Aluminum Oxide nanostructures in large volume for industrial applications, due to their expensive and time consuming production methods such as: chemical vapor deposition (CVD) techniques or electrophoretic based methods [22][23][24][25][26][27][28][29][30][31][32], limited their application for opteoelectronic devices or water purification technologies. On the other hand, novel fabrication techniques such as electrochemical anodization methods have shown more accurate controllability over materials morphology and chemical composition of nanostructures in comparison to conventional production techniques as well as their easier scalability for industrial applications [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52]. As a result, the electrochemical anodization techniques have a potential to pave the way for the industrial scale production of nanostructures with a highly controlled morphology as well as their chemical composition and crystalline structure [53].…”

Section: Introductionmentioning

confidence: 99%

Synthesizing high aspect ratio Aluminum Oxide nanowires from highly-ordered anodic self-assembled templates

Ghezghapan¹,

Saba²

2018

Preprint

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Aluminum Oxide and its nanostructures are attracted the attention of researchers due to their special materials properties such as: high electrical insulation, high mechanical strength, corrosion resistance, chemical stability, and low thermal conductivity. Furthermore, Aluminum Oxide nanowires shows large surface area as well as highly electropositive surface, which makes them suitable candidates for water purification technology applications. One of the main challenges, which limited the usage of Aluminum Oxide nanowires, is high cost and complex fabrication methods for Aluminum Oxide synthesizing such as chemical vapor deposition (CVD) techniques. On the other hand, electrochemical methods such as anodizing/etching techniques show high controllability over chemical composition, morphology,and crystalline structure of nanowires. In this research, a room temperature two-steps anodization procedure is developed to fabricate a highly-ordered self-assembled templates. Furthermore, the etching method is used to convert this synthesized self-assembled template into Aluminum Oxide nanowires. The results show that the proposed electrochemical method maintains a highly-ordered morphology as well as industrially acceptable controllability over crystalline structure of nanowires, which could be used to optimize the procedure for industrial applications due to low cost and simple experimental setup.

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