The Application of Porous Anodic Aluminum Oxide in Field-Flow Fractionation for Nanoparticles Size Discrimination

• Main Authors: Lee, Kuan-Wei, 李冠緯
• Other Authors: Lu, Chia-Jung
• Format: Others
• Language: en_US
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/tcy2h9

碩士 === 國立臺灣師範大學 === 化學系 === 107 === In the research, we developed a brand new Field-Flow Fractionation (FFF) device which based on porous anodic aluminum oxide (AAO) plate. After we issued a hypothesis of trap model, a series of experiments was designed to verify and testify the hypothesis. The line of the research separated into two different operations, the Electric Field-Flow Fractionation (ElFFF) and Magnetic Field-Flow Fractionation (MFFF). First, in the ElFFF experiment, a valuable result was found that a particle with a diameter (10 nm) smaller than the pores of AAO was prone to electrolysis under the electric field. While a particle had a diameter (40 nm) larger than AAO pores, such the tendency was not been found. However, the drawback of ElFFF, bubble formation, profoundly retarded us to verify the trap model in ElFFF. Second, in the MFFF experiment, the trap phenomenon was detected both in AAO plate and unprocessed Al plate, but the number of trapped particles in AAO plate was much more than Al plate. Furthermore, through the analysis of these trapped and non-trapped particles size, an exciting result indicated that the size of trapped particles was generally smaller than non-trapped particles. Although this was merely quite preliminary research, the size choosing ability of porous AAO first revealed in FFF instrument.