AC-Electrogravimetry Investigation in Electroactive Thin Films

Redox switching of Prussian blue thin films investigated by ac-electrogravimetry

“…Ac-electrogravimetric measurements were carried out by using a 4 channels frequency response analyser (Solartron 1254 TFA) and home-made potentiostat and quartz crystal microbalance. Details of the experimental equipment are given elsewhere [17,41,42] Films are considered as acoustically thin enough and this hypothesis is fully justified with PB film thickness in the sub-micrometric range [43] The PB films were tested in various conditions in aqueous media, 0.5 M KCl at pH 2.5, 0.05M KCl at pH 5.4, and then, the influence of KCl concentration at pH 5.4 was investigated. were measured at various modulation frequencies between 63kHz and 10mHz by using a four channels frequency response analyser.…”

Correlation between ion-exchange properties and swelling/shrinking processes in hexasulfonated calix[6]arene doped polypyrrole films: ac-electrogravimetry and electrochemical atomic force microscopy investigations

“…The experimental procedure and setup used to carry out the ac-electrogravimetry experiments have been reported elsewhere in previous publications of our group [42][43][44][45]. The quartz crystals used in the present investigations have a base frequency of 9 MHz.…”

“…(12) : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Simultaneous measurements of the electrochemical impedance E ( ) I and of the electrogravimetric transfer function m ( ) E were performed by using a technique already described elsewhere [42][43][44][45]. Figure 3 Figure 6 shows that it is mainly the cations which are involved in the charge compensation: a large quantity of cations are expelled when the potential increases.…”

Enhanced Redox Transformation Efficiency in Unconjugated Electroactive Polymer/Carbon Nanotube Hybrids

“…1−9 EAPs are categorized into two classes: intrinsically conducting polymers (ICPs) and redox polymers (RPs). 10,11 ICPs, such as polyaniline (PANI), possess conjugated backbones that undergo redox reactions and exhibit electron conducting behavior similar to that of metals. 10 In contrast, RPs such as polyvinylferrocene (PVFc) have unconjugated backbones that do not participate in the redox transformation; only the pendent, discrete redox moieties can accept or donate electrons.…”

“…Electroactive polymers (EAPs) are attracting widespread interest in many research areas, such as organic electronics, molecular sensing, energy storage, drug delivery, and neural interface technologies . Better control over the redox transformation efficiency (RTE) and elucidation of the charge transport mechanism are the main barriers to such applications. − EAPs are categorized into two classes: intrinsically conducting polymers (ICPs) and redox polymers (RPs). , ICPs, such as polyaniline (PANI), possess conjugated backbones that undergo redox reactions and exhibit electron conducting behavior similar to that of metals . In contrast, RPs such as polyvinylferrocene (PVFc) have unconjugated backbones that do not participate in the redox transformation; only the pendent, discrete redox moieties can accept or donate electrons.…”