Počet záznamů: 1

Funnel-type etched ion tracks in polymers

  1. 1.
    0346530 - UJF-V 2011 RIV GB eng J - Článek v odborném periodiku
    Fink, Dietmar - Vacík, Jiří - Hnatowicz, Vladimír - Munoz, G. H. - Alfonta, L. - Klinkovich, I.
    Funnel-type etched ion tracks in polymers.
    Radiation Effects and Defects in Solids. Roč. 165, č. 5 (2010), s. 343-361 ISSN 1042-0150
    Grant CEP: GA AV ČR(CZ) KAN400480701
    Výzkumný záměr: CEZ:AV0Z10480505
    Klíčová slova: tracks * polymers * etching
    Kód oboru RIV: JJ - Ostatní materiály
    Impakt faktor: 0.660, rok: 2010

    It is shown that conical track etching is a much more complicated process than generally assumed. The choice of the corresponding parameters (i.e. the ratios of concentrations and diffusion coefficients of both etchant (e.g. NaOH) and stopping solutions (e.g. HCl) and the etching temperature) determines the ratio of polymer dissolution to etchant penetration. The latter value controls the counterplay of diffusion, etching, ionic conductivity, field emission and capacitive effects, which is decisive for both the final track shapes and their electronic properties. The stages of track evolution during etching under different conditions are outlined in detail. Both transparent conical nanopores and "funnel-type" tracks can be obtained, the latter consisting of a shorter cone and a residual latent track. Depending on the internal structure of that latent track segment, such funnel-type tracks either allow smooth transmission of the rectified currents or they emit unipolar current spikes.
    Trvalý link: http://hdl.handle.net/11104/0187539