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Preparation of ion-track membranes of poly($$p$$-phenylene terephthalamide)

Yamaki, Tetsuya; Asano, Masaharu; Maekawa, Yasunari; Suzuki, Yasuyuki; Yoshida, Masaru; Neumann, R.*; Voss, K.-O.*

The preparation of ion-track membranes of thermally stable poly($$p$$-phenylene terephthalamide) (PPTA) was performed by ion beam irradiation followed by chemical etching with a sodium hypochlorite solution. Cylindrical pores were observed in the membrane irradiated with $$^{197}$$Au and $$^{238}$$U ions at an energy of 11.1 MeV/n. In contrast, funnel shape pores appeared in the membrane irradiated with $$^{84}$$Kr, $$^{102}$$Ru and $$^{129}$$Xe ion at energies of 6.2, 3.6 and 3.5 MeV/n, respectively. The effect of the ion velocity as well as of the LET in the damage creation might be manifested for the present etched tracks.

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