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Electrochemical behaviour of poly(pyrrole) coatings on steel

“…The rates obtained in the single layer experiments are within the range of values reported in literature. The dodecyl sulphate (DDS) anions used by Tamm et al [33] yield a similar deposition rate as the PSS anions in our experiments, even though the DDS ions are smaller than the PSS ions.…”

“…The rate of deposition for polypyrrole is significantly influenced by the size of the anions used [33,34]. Deposition rates reported in the literature are listed in Table 2, together with the conditions under which they were obtained.…”

“…Pickup et al [35] PPy (perchlorate) on Pt wire 0.35±0.13 a Nguyen Thi Le et al [11] PPy (oxalate) on iron 0.6 b Diaz et al [5] PPy (tetrafluoroborate) on Pt 0.4 Tamm et al [33] PPy (small ions, generic) on Pt/Au 0.4 Tamm et al [33] PPy ( These times are shown in Table 3 for the single and dual layer samples in Na 2 SO 4 and NaCl. It is clear that the protection time for the dual layers is higher.…”

Ion and solvent transfers accompanying redox switching of polypyrrole films immersed in divalent anion solutions

“…Investigations of PPy films doped with sulfate [40,37] showed that both cations and anions are involved in the charge compensation process. Tamm et al [41] examined changes in film composition by electron probe microanalysis and showed that "the redox behavior of PPy films doped with anions of low mobility, such as SO 4 2− and DDS − , depends on the nature of the cation". However, there appear to be no data that compare ion transfer(s) in the presence of different divalent anions.…”

Improvement of Selective Properties of Waveguide Bragg Resonators

“…When ( ) π β β = − right left this resonance appears in the center of the stop-band. This resonant phenomenon is analogous to the appearance of energetic levels for electrons in the forbidden zone of crystals with a defect in the periodicity (Tamm's surface level [6]). …”