| 초록 |
We describe a unique method which makes uniform size and high density nanocrystal arrays (6×108 - 5×1010 cm-2) using an anodic aluminum oxide (AAO) template as zepto-liter reaction vessel. Two-step anodization was carried out. 2nd anodization time was very short (50 S) to produce a high density zepto-liter beaker arrays with appropriate volume of zepto-liter scale. Zepto-liter beakers were filled with NaCl solution by discontinuous dewetting and solvent was evaporated at room temperature. Size of nanocrystals could be adjusted in the range of 20-45 nm, depending on precursor concentration and volume of vessel. Fraction of NaCl nanocrystal filling in each pore was 90 ~ 95 %. This method is very simple and convenient. Moreover, we can grow nanocrystals on substrate directly. Although we show the preparation of NaCl nanocrystal arrays here, we expect this method would be generalized in growing different kinds of nanocrystals. |
