Electroanalytical applications of nanocomposites from conducting polymers and metallic nanoparticles prepared by layer-by-layer deposition

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. Electroanalytical applications of nanocomposites 349Fig. 3 (a) Cyclic voltammograms measured in 0.5 M H 2 SO 4 after the deposition of each PANI layer in the course of the formation of 6-bilayer Au NP-PANI nanocomposite structure on glassy carbon electrode. (Sweep rate: 100 mV/s.) (b) Dependence of the leucoemeraldine-to-emeraldine oxidation peak currents on the number of adsorbed PANI layers. Electroanalytical applications of nanocomposites 351 Fig. 6 SEM of: (a) LbL-deposited Pd NP-PANI composite consisting of 7 bilayers and (b) electrochemically obtained Pd-PANI-PAMPSA composite (m Pd = 3.2 μg cm -2 ). Electroanalytical applications of nanocomposites 355 Fig. 11 (a) DPV measurements in the presence of different concentrations of DA and UA (see text) carried out at LbL-deposited Au NP-PANI composite consisting of 5 bilayers; (b) concentration dependence of the UA oxidation peak currents obtained in the presence of 0.1 mM DA ( ) and 0.31 mM DA ( ) according to the DPV measurements shown in (a).V. TSAKOVA et al.

Electroanalytical chemistry for the analysis of solids: Characterization and classification (IUPAC Technical Report)

“…Reviews on conducting polymers [25][26][27] and nanocomposites with metal nanoparticles [7] and carbon nanotubes [28][29][30] are available.…”

“…but it lends itself also for providing analytical information on the structure and chemical and mineralogical composition of solid materials of various kinds, e.g., metals and alloys, films in electrochemical biosensors [5,6], conducting polymers, and materials used in nanotechnology (redox-active nanomaterials, catalyst nanocomposites, metallic nanoparticles, etc.) [7].…”

Grafting Poly(acrylic acid) from PEDOT To Control the Deposition and Growth of Platinum Nanoparticles for Enhanced Electrocatalytic Hydrogen Evolution

“…Of all the methods of producing PtNPs, − electrochemical deposition from a platinum salt electrolyte is one of the fastest and most straightforward . This one-pot system provides instant nanoparticle growth, reducing the need for stabilizing agents to prevent aggregation, and thus does not require subsequent purification steps beyond electrode rinsing. , …”

Palladium-modified polysulfonic acid-doped polyaniline layers for hydrazine oxidation in neutral solutions

“…A three times smaller sensitivity (in the chronoamperometric mode) is characteristic for the Pd-PANI-PAMPSA layer when compared directly to the LbL-produced material [35]. This draw back is combined however with an extended range of linear response (upper limit 1 mmol l À1 instead of 300 lmol l À1 [18]) and smaller noise in the chronoamperometric transients.…”