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Nano-Scaled Linear Pore Arrays on Anodic Aluminum Oxide Template
수진 이,조운조 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.III
One-directional pore arrays were obtained on an anodic aluminum oxide template by roller-pressing prior to anodizing processes, independent of the specific anodization conditions. We could produce elliptical pore channels - even down to 30 nm wide - parallel to the AAO template surface. The nano-scaled linear pore arrays of these AAO templates were determined using a scanning electron microscope and an atomic force microscope. All the pores are elongated into an elliptical shape and aligned along one direction. Connecting pores along the direction of elongation makes some linear channels.
Synthesis of Silicon Nanocrystals
수진 이,조운조 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.III
We have prepared nanometer-sized silicon colloids in the range from 2 nm to 10 nm by a solution route. Silicon nanoparticles were prepared from Zintl salt, sodium silicide (NaSi) in ethylene glycol dimethyl ether (glyme). This synthesis provided a narrow range of particle size distribution under low-pressure and low-temperature conditions. The surface of silicon was passivated with the hydroxyl group (-OH) by the reaction of silicon nanoparticles with water. The average cluster size depended on the reflux time of NaSi in glyme. We report the photoluminescence of silicon nanocrystals, which provided strong evidence of quantum confinements. Additionally, particle size analysis and high-resolution transmission electron microscopy (HRTEM) confirmed the size distribution and material identity of the silicon nanocrystals.