Influence of asymmetric etching on ion track shapes in polycarbonate

[摘要] By combining low-energy ion irradiation with asymmetric etching, conical nanopores of controlled geometry can be etched in polycarbonate (PC). Cone bases vary from 0.5 to 1 mu m. Top diameters down to 17 nm are reached. When etching from one side, the pH on the other side (bathed in neutral or acidic buffer) was monitored. Etching temperature ranged from 65 degrees C to 80 degrees C. Pore shape characterization was achieved by electro replication combined with SEM observation. The tip shape depended on whether an acidic buffer was used or not on the stopped side. (c) 2007 Elsevier B.V. All rights reserved.

[发布日期] 2007-12-01

[效力级别]  Proceedings Paper

[关键词] conical pores;track-etched membranes;electrodeposition