Change in the surface structure of semiconductor polymer films during reverse oxidation-reduction
A.A. Krylov, V.G. Alekseev, M.A. Feofanova, A.I. Ivanova, N.V. Baranova
Tver State University
Abstract: The surface morphology of films of semiconducting polymers: polyaniline, poly-o-toluidine, poly-naphthylamine was studied by scanning electron microscopy. The films were obtained by electrochemical synthesis from solutions of their monomers acidified with mineral acids by the method of cyclic voltammetry. The films are formed on platinum substrates made according to the principle of bimetallic plates. The processes of reversible oxidation and reduction of the obtained films were carried out using an electric current in aqueous solutions of hydrochloric acid, which led to the doping of polymers with chloride anions. It was shown that the surface of films of polyaniline and poly-o-toluidine has a similar structure, consisting of numerous spherical grains ranging in size from 1 to 5 μm. The surface of poly-α-naphthylamine films is significantly different and consists of dendrons and large pores. In this case, in all cases, the observed supramolecular formations for films in the oxidized state are somewhat larger than for films in the reduced state, which is due to a change in the conformation of macromolecules.
- Anatolii A. Krylov – Leading Engineer, Department of Inorganic and Analytical Chemistry, Tver State University Alexandra I. Ivanova – Ph. D., Docent, Applied Physics Department, Tver State University
- Vladimir G. Alekseev – Dr. Sc., Docent, Professor of Department of Inorganic and Analytical Chemistry, Tver State University
- Mariana A. Feofanova – Ph. D., Docent, Head of the Department of Inorganic and Analytical Chemistry, Dean of the Chemical and Technology Department, Tver State University
- Alexandra I. Ivanova – Ph. D., Docent, Applied Physics Department, Tver State University
- Nadezhda V. Baranova – Ph. D. in Chemistry, Docent, Department of Inorganic and Analytical Chemistry, Tver State University
Krylov, A.A. Change in the surface structure of semiconductor polymer films during reverse oxidation-reduction / A.A. Krylov, V.G. Alekseev, M.A. Feofanova, A.I. Ivanova, N.V. Baranova // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. – Tver: TSU, 2021. — I. 13. — P. 228-234. DOI: 10.26456/pcascnn/2021.13.228. (In Russian).
Full article (in Russian): download PDF file
1. Sansiñena J., Gao J., Wang H.‐L. High‐performance, monolithic polyaniline electrochemical actuators, Advanced Functional Materials, 2003, vol. 13, issue 9, pp. 703-709. DOI: 10.1002/adfm.200304347.
2. Hosseini S.H., Khalkhali R.A., Noor P. Study of polyaniline conducting/electroactive polymer as sensor for some agricultural phosphorus pesticides, Monatshefte für Chemie - Chemical Monthly, 2010, vol. 141, issue 10, pp. 1049-1053. DOI: 10.1007/s00706-010-0374-5.
3. Oyama N., Ohsaka T. Electrochemical properties of the polymer films prepared by electrochemical polymerization of aromatic compounds with amino groups, Synthetic metals, 1987, vol. 12, issue 1-3, pp. 375-380. DOI: /10.1016/0379-6779(87)90908-8.
4. Ryasenskii S.S., Krylov A.A. Elektrokhimicheskij aktuator [Electrochemical actuator], Vestnik Tverskogo gosudarstvenno universiteta. Seriya: Khimiya [Bulletin of the Tver State University. Series: Chemistry], 2013, no. 15, pp. 9-13. (In Russian).
5. Gorelov I.P., Ryasenskij S.S., Kholoshenko N.M. Novyj funktsionalizirovannyj elektroprovodnyj polimer: Elektrosintez i sensornye svojstva [New functionalized electrically conductive polymer: Electrosynthesis and sensory properties], Khimicheskaya fizika [Chemical Physics], 2007, vol. 26, no. 4, pp. 105-109. (In Russian).
6. Kuznetsova M.V., Ryasenskij S.S., Kartamyshev S.V., Gorelov I.P. Elektrokhimicheskij sintez poli( α -naftilamina) [Electrochemical synthesis of poly (α-naphthylamine)], Fiziko-khimiya polimerov: sintez, svojstva i primenenie [Physicochemistry of Polymers: Synthesis, Properties and Application], 2003, no. 9, pp. 201-202. (In Russian).
7. Allen M.P. Introduction to molecular dynamics simulation, Computational soft matter: from synthetic polymers to proteins, lecture notes. NIC Series, vol. 23, ed. by N. Attig, K. Binder, H. Grubmüller, K. Kremer. Jülich: John von Neumann Institute for Computing, 2004, pp. 1-28.
8. Tang C., Chen N., Hu X. Conducting polymer nanocomposites: recent developments and future prospects, Conducting polymer hybrids, Springer series on polymer and composite materials. Cham, Springer, 2017, pp. 1-44. DOI: 10.1007/978-3-319-46458-9
9. Stejskal J., Sapurina I. Polyaniline: thin films and colloidal dispersions, Pure and Applied Chemistry, 2005, vol. 77, no. 5, pp. 815-826. DOI: 10.1351/pac200577050815.
10. Ortega E., Armijo F., Jessop I. et al. Chemical synthesis and characterization of polyaniline derivatives: substituent effect on solubility and conductivity, Journal of the Chilean Chemical Society, 2013, vol. 58, issue 4, pp. 1959-1962. DOI: 10.4067/S0717-97072013000400010.
11. Stejskal J., Sapurina I., Trchová M., Konyushenko E.N. Oxidation of aniline: Polyaniline granules, nanotubes, and oligoaniline microspheres, Macromolecules, 2008, vol. 41, issue 10, pp. 3530-3536. DOI: 10.1021/ma702601q.