la0522810_si_001.pdf (1.14 MB)
Facile Preparation of Nanoelectrode Ensembles Using Amphiphilic Block Copolymer Film
journal contribution
posted on 2005-12-06, 00:00 authored by Kouske Hirota, Keisuke Tajima, Kazuhito HashimotoTaking advantage of both the self-organizing characteristics and the amphiphilic property of poly(styrene-block-ethyleneoxide) (P(S-b-EO)), we have realized one-step fabrication of nanoelectrode ensembles
(NEEs). By choosing the electrolyte solution elaborately, only the poly(ethylene oxide) (PEO) segment in
the P(S-b-EO) film was swollen to serve as nanoscale tunnels for solvated ions, whereas the polystyrene
segment remained robust to be the electrode mask. An electrochemical analysis indicated that a transition
between linear diffusion and nonlinear diffusion could be observed due to the small diffusion coefficient
of ferrocene in PEO nanodomains.