Tuning of the electrochemical properties of transparent fluorine-doped tin oxide electrodes by microwave pulsed-plasma polymerized allylamine
Anna Cirocka , Dorota Zarzeczańska , Anna Wcisło , Jacek Ryl , Robert Bogdanowicz , Birgit Finke , Tadeusz Ossowski
AbstractWe report here the dry, one-step, and low-temperature modification of FTO surfaces using pulsed plasma polymerization of allylamine (PPAAm). PPAAm/FTO surfaces were characterized by X-ray photoelectron spectroscopy, spectroscopic ellipsometry, and contact angles to understand the morphological, structural, and optical properties. FTO were coated with a very thin layer of adherent cross-linked, pinhole-, and additive-free allylamine plasma polymer resistant to hydrolysis and delamination, and characterized by a high density of positively charged amino groups. Electrochemical studies revealed that PPAAm/FTO electrodes show wide range pH stability and reaction rates tuned by the duration of plasma treatment. We show how the modification of plasma treatment duration between 72 s and 288 s affects the chemical structure and thickness of the obtained modification, having a strong influence on the charge transfer kinetics. In particular, XPS revealed the occurrence of the reduction processes under long-term plasma exposure proving the need for monitoring of this key factor. This covalent immobilization of amine compounds on FTO surface using rapid process in microwave pulsed-plasma makes it a promising electrode for future applications in electrochemical biosensors and optoelectronic devices.
|Journal series||Electrochimica Acta, ISSN 0013-4686, (N/A 100 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Fluorine-doped tin oxide electrodes, surface modification, plasma polymerization, allylamine, direct surface amination|
|Score||= 100.0, 28-01-2020, ArticleFromJournal|
|Publication indicators||= 0; : 2018 = 1.081; : 2018 = 5.383 (2) - 2018=4.94 (5)|
|Citation count*||2 (2020-03-24)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.