Polyethyleneimine as a pH sensitive film for potentiometric transducers

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

“…This value of pK H is closer to value determined by Ref. [13] (pK H¨À 6.5) for flat sample pretreated before deposition of PEI. The value of N s for pre-treated flat silicon surface/PEI/electrolyte structure, obtained by similar filling, is closer to 5.2  10 13 cm À 2 .…”

“…The mean sensitivity is found to be 62 mV per pH unit. Such sensitivity is quite large compared than that obtained with plane passivated silicon electrode which was close to 45 mV per pH unit [13,14] and greatly higher than that of thermal silica which has sensitivity lower than 36 mV per pH unit [23].…”

“…., 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]. Besides, this polymer has been widely used in a number of immobilization processes of biosystems [17 -21] for its high concentration of amino groups.…”

Characteristics of polyelectrolyte multilayers: Effect of PEI anchoring layer and posttreatment after deposition

“…They can be applied as separation membranes for gases or dissolved species [15] or for modification of surface properties, which has a special meaning in the biomaterials area [4]. This technique can be efficiently used in the field of chemical and biochemical sensing [16][17][18]. Coating of microemulsion droplets or colloidal particles and formation of hollow shell structures of controlled permeability are of importance in encapsulation applications, e.g., in drug carrier systems and microreactors [19][20][21].…”

The effect of support material and conditioning on wettability of PAH/PSS multilayer films

“…They can be applied as separation membranes for gases or dissolved species or for modification of surface properties, which has a special meaning in biomaterial area [4]. This technique can be efficiently used in the field of chemical and biochemical sensing [5][6][7]. Coating of colloidal particles and formation of hollow shell structures are of importance in case of encapsulation applications, e.g.…”