抄録
Currently electrospray and electrospinning techniques have been developed using electrostatic repulsion forces on droplet surface to obtain nanofiber. Ions are the important key factor on both applications. Scientist observed natural phenomena and found the existence of ions more than 100 years ago. When the historical background of electrospray was surveyed from the viewpoint of the ionization technique, the origin started by the awareness of the charged drops in nature. Iribarne noticed that ions were produced by bubbles at the surface of the sea water forming the electric double layer and utilized these fact to create ions. Dole ionized polymers by the hydrostatic electrification of droplets from the hypodermic needle with the Faraday cage as a function of the repeller voltage and originated the electrospray ionization. Cluster ions were separated by the skimmer technique and the positive and negative ion peaks were obtained. The multiply charged macro ion from electrospray ionization was determined. Now electrospray ionization of liquids with quadropole mass analysis to analyze proteins and nucleotides is one of the main streams of the structural characterization. The use of AC in electrospraying method and electrospinning process was demonstrated to obtain PEO fiber mats in a significant reduction of whipping.
