Metal-polymer nanocomposites as materials for ion-selective sensors

Yasnaya, M.A.; Kornilov, D. Yu.; Sytnikov, E. V.; Sinel'nikov, B. M.; Каргин, Н. И.; Khoroshilova, S. E.

doi:10.1134/s0020168508030047

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…They concluded that the size, shape, and material of the NPs will influence ET kinetics in voltammetry. Most of the work in this field involves the incorporation of gold nanoparticals (GNP) in a polymeric membrane or film − or as substrate for SAMs. − Unlike the use of metal nanoparticles to improve the membrane performance toward specific interaction, − carbon nanotubes (CNT) have mainly been used for field effect transistors (FET) or as substrates for aptamers. − Kalanur showed that the use of TiO 2 nanoparticles improve ET kinetics, while Tratnyek found that nano zerovalent iron, which was spontaneously adsorbed on a GCE surface, caused the electrode to behave in the same manner as an iron electrode.…”

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confidence: 89%

Enhanced Potentiometry by Metallic Nanoparticles

2013

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Measuring the oxidation-reduction potential (Eh) requires an interface that is not selective toward specific species but exchanges electrons with all redox couples in the solution. Sluggish electron transfer (ET) kinetics with the species will not reflect the "true" Eh of the solution. Here, we present a novel approach by which adsorbed metal nanoparticles (NPs) are used for enhancing ET exchange rates between redox species and electrode surface and therefore affect significantly the measurement of the open circuit potential (OCP) and cyclic voltammetry (CV). The OCP and CV of various organic and inorganic species such as l-dopa, dopac, iron(II), and iodide are measured by bare stainless steel and by stainless steel modified by either Pt or Au NPs. We study the effect of the surface coverage of the stainless steel surface by NPs on the electrochemical response. Moreover, the stainless steel electrode was modified simultaneously by Au and Pt nanoparticles. This improved concurrently the stainless steel response (CV and potentiometry) toward two different species; l-dopa, which shows fast electron transfer on Pt, and catechol, which exhibits fast electron transfer on Au. We believe that this approach could be a first step toward developing a superior electrode for measuring the "true" Eh of complex aquatic systems.

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confidence: 89%

Enhanced Potentiometry by Metallic Nanoparticles

2013

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“…The most widespread chemical methods is reduction of silver particles from aqueous solutions of silver salts in the presence of stabilizers [4][5][6]. The reducing agents are hydrogen and hydrogen-containing compounds such as tetrahydroborates [4,7] and citrates of alkali metals [8], hypophosphites, alcohols [9], organometallic compounds [10]. Silver nanoparticles can be reduced either on the surface of pre-synthesized latex microspheres in the presence of a reducing agent or at the stage of monomer polymerization [11].…”

Section: Introductionmentioning

confidence: 99%

Using Nanosecond Electron Beam to Produce Silver Nanopowder

Balezin¹,

Timoshenkova²,

Sokovnin³

et al. 2008

j. Korean Powder Metall. Inst.

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Experiments with a URT-0.5 accelerator (0.5 MeV, 50 ns, 1 kW) generating a nanosecond electron beam for irradiation of silver nitrate in various liquid solutions (water and toluene) were performed with the aim of producing silver nanopowders. A radiochemical reaction allows making weakly agglomerated pure Ag powders with particles of 10-15 nm and 30-50 nm in size by irradiation in toluene and water respectively. The injection of the nanosecond electron beam energy to the solution is optimal. As the absorbed dose increases, the output of the radiochemical reaction does not grow, but more agglomerated powders are synthesized.

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“…Polymer-nanometal matrices and nanometalpolymer composites are potential materials for many technological applications due to their unique physical, and photo-electrochemical properties [1]. Nanocomposite materials have considerable potential for the fabrication of sensors in the context of environmental and food safety monitoring [2].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Ag@polycarbazole nanoparticles using different oxidants and their dispersion behavior

Ahmad

Choudhary

Mirza

et al. 2016

Materials Science-Poland

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Ag nanoparticles (NPs) encapsulated by polycarbazole (PCz) have been synthesized using ion adsorption method. The PCz synthesis around Ag NPs has been performed by adsorbing Ag +1 and Fe +3 oxidants onto Ag NPs, which initiated surface polymerization and thus, Ag NPs@PCz nanocomposite has been synthesized. The morphology of pure NPs and composite NPs was characterized by TEM which also elucidated the effect of oxidant on the core NPs, beside their morphologies and phase contrasts of metal NPs and polymer. The polymer around the surface of core NPs was characterized by FT-IR which proved that PCz was the organic phase of the composite NPs. UV-Vis spectroscopy has been employed to study surface plasmon resonance (SPR) of pure NPs and composite of NP which demonstrated that SPR of core NPs remained preserved after coating with the polymer. Furthermore, Zeta Sizer Nano series has been applied to analyze the dispersion behavior of pure NPs and composite NPs which displayed the greatly improved dispersion behavior of the composite NPs as compared to pure Ag NPs. Therefore, our study proved helpful to analyze the suitability of metal oxidants for PCz based nanocomposite synthesis and determination of their optical and dispersion behavior.

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Metal-polymer nanocomposites as materials for ion-selective sensors

Cited by 5 publications

References 8 publications

Enhanced Potentiometry by Metallic Nanoparticles

Enhanced Potentiometry by Metallic Nanoparticles

Using Nanosecond Electron Beam to Produce Silver Nanopowder

Synthesis and characterization of Ag@polycarbazole nanoparticles using different oxidants and their dispersion behavior

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