@misc{LyutovIvanovMirskyetal., author = {Lyutov, Vladimir V. and Ivanov, Svetlozar D. and Mirsky, Vladimir M. and Tsakova, Vessela T.}, title = {Polyaniline doped with poly(acrylamidomethylpropanesulphonic acid): electrochemical behaviour and conductive properties in neutral solutions}, series = {Chemical Papers}, volume = {67}, journal = {Chemical Papers}, number = {8}, issn = {1336-9075}, doi = {10.2478/s11696-013-0341-9}, pages = {1002 -- 1011}, abstract = {Poly(2-acrylamido-2-methyl-1-propanesulphonic acid) (PAMPSA)-doped polyaniline (PANI) layers are synthesised in the presence of sulphuric and perchloric acids. The effects of the inorganic acid as well as of the electrochemical synthetic procedure (potentiostatic and potentiodynamic deposition) and thickness of the polymer layers are studied. The focus is directed towards the pH dependence of the electrochemical redox activity and conductivity of the PAMPSA-doped PANI layers obtained under different conditions. Ascorbic acid oxidation is used as a test reaction to study the electrocatalytic behaviour of various PAMPSA-doped PANI layers in neutral solution. It is found that the type of inorganic component present in the polymerisation solution has a marked effect on the extent of doping in acidic solutions as well as on the redox electroactivity in neutral solutions. A comparison between potentiostatically and potentiodynamically synthesised layers at pH 7 shows a markedly lower conductance and lower extent of redox charge preservation in the case of potentiodynamic synthesis. The PANI electrocatalytic activity for ascorbic acid oxidation is also dependent on the polymer electrodeposition procedure, with potentiostatically synthesised layers exhibiting better electrocatalytic performance.}, language = {en} } @misc{TsakovaIvanovLangeetal., author = {Tsakova, Vessela T. and Ivanov, Svetlozar D. and Lange, Ulrich and Stoyanova, Aneliya and Lyutov, Vladimir V. and Mirsky, Vladimir M.}, title = {Electroanalytical applications of nanocomposites from conducting polymers and metallic nanoparticles prepared by layer-by-layer deposition}, series = {Pure and Applied Chemistry}, volume = {83}, journal = {Pure and Applied Chemistry}, number = {2}, issn = {1365-3075}, doi = {10.1351/PAC-CON-10-08-01}, pages = {345 -- 358}, abstract = {Layer-by-layer (LbL) deposition is a convenient technique for the formation of ultra-thin nanocomposite layers containing metallic nanoparticles (NPs) and conducting polymers (CPs). The advantages of this approach for producing composite layers suitable for electroanalytical applications are discussed. Examples of electroanalytical applications of LbL-deposited composites are presented. Composite layers consisting of polyaniline (PANI) and Pd NPs are used for hydrazine oxidation. The PANI-Au NPs system is applied for dopamine (DA) and uric acid (UA) oxidation.}, language = {en} } @misc{LangeIvanovLyutovetal., author = {Lange, Ulrich and Ivanov, Svetlozar D. and Lyutov, Vladimir V. and Tsakova, Vessela T. and Mirsky, Vladimir M.}, title = {Voltammetric and conductometric behaviour of self assembled multilayer nanocomposites of polyaniline and gold nanoparticles}, series = {Journal of Solid State Electrochemistry}, volume = {14}, journal = {Journal of Solid State Electrochemistry}, number = {7}, issn = {1432-8488}, doi = {10.1007/s10008-009-0922-2}, pages = {1261 -- 1268}, abstract = {Multilayer nanocomposites from polyaniline (PANI) and gold nanoparticles (AuNPs) were formed by layer-by-layer deposition. The formation of PANI-AuNPs multilayer structures was monitored by UV-vis absorption spectroscopy and cyclic voltammetry. Each deposited bilayer of PANI-AuNPs led to a monotonous and almost linear increase in both optical absorbance and the first current peak of PANI oxidation. The prepared multilayer nanocomposites were characterized by in situ conductivity measurements at different pH and potential and by transmission electron microscopy. Finally, chemosensitive properties of the new material based on the intrinsic affinity of gold nanoparticles were studied. Changes in the film resistance on exposure to vapors of mercury and sulfur-containing compounds were observed.}, language = {en} }