Influence of asymmetric etching on ion track shapes in polycarbonate Influence of asymmetric etching on ion track shapes in polycarbonate

M.-C Clochard, Travis Wade, J.-E Wegrowe, Emmanuel Balanzat, M.-C Clochard, Travis Wade, J.-E Wegrowe, Emmanuel, M-C Clochard, T Wade, J-E Wegrowe, E Balanzat
2015 unpublished
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 1µm. 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°C to 80°C. Pore shape characterization was achieved by electro replication combined with SEM observation. The tip shape depended on whether
more » ... acidic buffer was used or not on the stopped side. PACS: 61.41+e, 61.46df, 61.80Jh, 41.75.-i
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