Control of locally deposited gold nanoparticle on polyaniline films

Sheffer, Marisa; Mandler, Daniel

doi:10.1016/j.electacta.2008.12.027

Cited by 29 publications

(13 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most of the studies in this field concern the deposition of noble metals Au [16,[210][211][212][213][214][215][216][217][218][219][220][221][222], Ag [223][224][225][226][227][228][229][230][231][232][233][234][235], Pd [156,158,[236][237][238][239][240][241][242][243][244][245][246][247][248], Pt [249,250] and Hg [251,252], with equilibrium potentials that are positive enough with respect to the potentials of oxidation transitions in most CPs, e.g. PANI, PPY etc.…”

Section: Use Of the Polymer Materials As Reductantmentioning

confidence: 99%

Metallic‐Based Nanocomposites of Conductive Polymers

Tsakova

2010

Nanostructured Conductive Polymers

View full text Add to dashboard Cite

IntroductionSince the remarkable discovery of high electrical conductivity in polymer materials in 1977 [1], studies on conductive polymers (CP 1 ) have developed into interdisciplinary research expanding in various directions. A significant impetus to the field was given by materials scientists in their attempts to combine the unique properties of conductive polymers with those of other inorganic and organic materials. Thus, in the last two decades, research on the synthesis of CP-based composite materials has flourished and resulted in the development of a great variety of new materials with interesting specifically designed properties. The accumulation of a great number of studies on nanocomposite materials has provoked the recent appearance of several review articles [2-7] attempting to summarize, from different specific points of view, the advances made in the field. Thus, electrochemical aspects [2,7] of CP-based composites, optical and electronic properties [3], polyaniline(PANI)-based nanocomposites [4], the involvement of composites of CPs in chemical sensing [5], and the incorporation of metallocenes in CPs [6] have been extensively discussed.

show abstract

Section: Use Of the Polymer Materials As Reductantmentioning

confidence: 99%

Metallic‐Based Nanocomposites of Conductive Polymers

Tsakova

2010

Nanostructured Conductive Polymers

View full text Add to dashboard Cite

show abstract

“…The local electrodeposition of cobalt or gold, at various substrates was also studied by SECM with a specific attention to gold deposition on silicon semi conducting substrates and to the electroless deposition of gold . However, these approaches need either the connection of the semiconducting substrate, using a precious metal, or a surface modification step ,. Since the open circuit potential of pyrite is <0.1 V vs SCE, SECM is appropriate to study the local and spontaneous deposition of a precious metal at the pyrite surface.…”

Section: Introductionmentioning

confidence: 99%

Scanning Electrochemical Microscopy for the Electroless Deposition of Gold on Natural Pyrite: Effect of Ferric Ions

et al. 2019

View full text Add to dashboard Cite

The local electroless deposition of gold on pyrite is studied by scanning electrochemical microscopy (SECM). The SECM and additional SEM experiments provide kinetic and mechanistic insights on the local galvanic replacement of pyrite by gold. We evidence that individual gold nanoparticles or full coverage of gold on the pyrite surface can be obtained by controlling either the deposition time or the flux of gold ions electrogenerated at the ultramicroelectrode. We also studied the influence of ferric ions, known to be implied on gold etching and pyrite corrosion and therefore, on the overall process of gold deposition on pyrite. We then demonstrate that the presence of ferric ions significantly modifies i) the thermodynamic of the gold electrodissolution, ii) the process of adsorption of auric ions on pyrite in the first instants, iii) the number of nucleation sites on the pyrite surface and, iv) the structure of the deposited gold layer.

show abstract

“…Another synthetic route applied mostly for film-coated electrodes is based on the opposite sequence of steps, starting from the polymer film deposition followed by electrodeposition of metal particles from its solute precursors, in particular metal cations [11,39] or metal complex [40], see also references therein and in [7]. A slightly different principle is used in ''electroless deposition'' where the reduction of the metal precursors is made by the reduced form of the polymer film [41][42][43] or polymer suspension [44].…”

Section: Introductionmentioning

confidence: 99%