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Anodic Aluminum Oxide(AAO)

power supply. chiller. Hot plate & Magnetic Spinner. Anodic Aluminum Oxide(AAO). ☞ What’s the AAO?. -. Naturally hexagonal ordered-structure with nano-scale pores. -. Simple process, low cost, various applications -. Various nano-structured material : nano-tube/wire/particle

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Anodic Aluminum Oxide(AAO)

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  1. power supply chiller Hot plate & Magnetic Spinner Anodic Aluminum Oxide(AAO) ☞ What’s the AAO? -. Naturally hexagonal ordered-structure with nano-scale pores. -. Simple process, low cost, various applications -. Various nano-structured material : nano-tube/wire/particle -. Electronic device, optical device, bio-technology -. Template, data storage, mask pattern.. ▲ hexagonal pore array ☞ Application of AAO? 200 nm 500 nm ▲ FE SEM IMAGE

  2. ㆍEtching ㆍ1st Anodization ㆍ2nd Anodization ㆍPore widening Fabrication of Anodic Aluminum Oxide(AAO) 500nm 200nm 500nm 500nm ㆍElectro-polishing : Degreasing 99.999% Al sheet 500 nm 500 nm 200nm

  3. Stent Description of Stent ☞ What is a “Stent”? and How is a one used? -. Stainless steel wire mesh tube for blood vessel frame.(Medical treatment for artery disease) -. Injection of stent with balloon for blood vessel expanding into the main artery [ASTM F.562] 1.8mm(φ) 18.2mm(L) 5mm(L) 23.2mm(L)

  4. SUS 316L AAO Stent AAO + Stent SUS 316L SUS 316L Issues and formation of drug storage space on Stent ☞ Issue in Stent -. Re-closure : restenosis rates are 20% to 40% at 6 months. -. Restenosis is a serious problem – Solution : drug-eluting stent. < Motivation > Need a drug storage space of nano-scale !! Drug-eluting stents are coated with drugs that are slowly released and help keep the blood vessel from reclosing • Formation of drug storage space on Stent Aluminum AAO Stainless steel wire Anodic oxidation Al deposition by evaporator

  5. 0min 9nm 15min 18nm 30min 32nm 45min 40nm 60min (Pore widening time) 58nm (Pore size) Pore density : 2.44×1014ea/m2 Over-etched plane view 100㎛ 1㎛ Pore size: ≒ 30nm Pore depth ≒ 150nm Fabricated AAO porous structure on Al sheet/Stent Porous structure for drug loading and release test on high purity aluminum sheet • Experimental procedures Electro-polishing Anodic oxidation AAO AAO Stent Pore widening Stent AAO formation

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