Surface modification of platinum and gold electrodes by anodic oxidation of pure ethylenediamine

Electric isolation of porous silicon by electro generated polyethyleneimine film, comparison to thermal oxide

“…2 are similar to the one obtained for EDA at a p-Si electrode [14] and for EDA at a Pt electrode [6,7]. During the first scan, one notes a peak at a potential around 2.5 V versus SRE and a flat signal ''plateau'' which takes place at potentials higher than 4 V versus SRE.…”

“…. ., by polyethyleneimine (PEI) through anodic oxidation of ethyleneimine (EDA) or diethylenetriamine (DETA) charged with salts such as Lithium Triflate (LiSO 3 CF 3 ), can give rise to a surface coating by the linear polyethyleneimine (L-PEI), through a mechanism previously described [6,7]. The PEI is used widely in chemical sensing [8 -12], most applications using PEI are determined by its pH sensitivity [13,14] and its ability to form complexes with anionic polyelectrodes [15] and with metal ions [16].…”

Electrochemical Oxidation of Ethylenediamine: New Way to Make Polyethyleneimine-Like Coatings on Metallic or Semiconducting Materials

“…1 All experiments were carried out at room temperature (293 K). The solutions were purged by ultrahigh purity argon.…”

Urea potentiometric biosensor based on modified electrodes with urease immobilized on polyethylenimine films

“…We used our new way of synthesis to electrodeposit PEI films onto the smooth Pt surface by means of cyclic voltammetry in 0.01 mol/l LiCF 3 SO 3 solutions of pure EDA (Herlem et al, 1997). Five cycles between 0 and +3V/SRE at 50 mV/s were performed and during the first scan the electrode was biased at +3V/SRE for 15 min (Fig.…”