Xanthate Capping of Silver, Copper, and Gold Colloids

Tzhayik, Oshrat; Sawant, Prashant D.; Efrima, Shlomo; Kovalev, E. G.; Klug, J. T.

doi:10.1021/la015653n

Cited by 86 publications

(65 citation statements)

References 36 publications

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“…thiol-derivatives, xanthate, etc.) [17][18][19] has been reported as well as various (mostly one-pot) synthesis strategies for capping with inorganic shells (e.g. silica, inorganic carbon) [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Silver-polymer core-shell nanoparticles for ultrastable plasmon-enhanced photocatalysis

Asapu¹,

Claes²,

Bals³

et al. 2017

Applied Catalysis B: Environmental

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Graphical abstractHighlights  Ag-polymer-TiO2 composites show ultrastable photocatalytic activity in the long term  Ag-polymer core-shell nanoparticles prepared using affordable layer-by-layer method  Thin polymer shell prevents oxidation and clustering of the silver nanoparticles  Finite element simulations show retention of plasmonic near-field enhancement 3 ABSTRACT Affordable silver-polymer core-shell nanoparticles are prepared using the layer-by-layer (LbL) technique. The metallic silver core is encapsulated with an ultra-thin protective shell that prevents oxidation and clustering without compromising the plasmonic properties. The core-shell nanoparticles retain their plasmonic near field enhancement effect, as studied from finite element numerical simulations. Control over the shell thickness up to the sub-nanometer level is there for key. The particles are used to prepare a plasmonic Ag-TiO2 photocatalyst of which the gas phase photocatalytic activity is monitored over a period of four months. The described system outperforms pristine TiO2 and retains its plasmonic enhancement in contrast to TiO2 modified with bare silver nanoparticles. With this an important step is made toward the development of longterm stable plasmonic (photocatalytic) applications.

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Section: Introductionmentioning

confidence: 99%

Silver-polymer core-shell nanoparticles for ultrastable plasmon-enhanced photocatalysis

Asapu¹,

Claes²,

Bals³

et al. 2017

Applied Catalysis B: Environmental

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“…Capping nanoparticles with a monolayer of organic molecules is a convenient way to stabilize them, which provides a method to generate organicinorganic core-shell composite with adjustable surface properties [19]. The organic molecules used as capping agent usually have a polar group, which can chemisorbed on the surface of the inorganic nano-core; and a long alkyl chain, which enables inorganic nanoparticles soluble in organic media to expand their potential application fields.…”

Section: Introductionmentioning

confidence: 99%

Tribochemistry and antiwear mechanism of organic–inorganic nanoparticles as lubricant additives

et al. 2006

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Lubricant-dispersible nanoparticles are prepared via a surface modification synthetic way and characterized by state of the art tools such as TEM. The tribological properties of the nanoparticles as lubricant additives were studied and the results show that the addition of nanoparticles as additives reduced wear and increased load-carrying capacity of base oil remarkably, indicating nanoparticles can be used as anti-wear and extreme-pressure additives with excellent performances. The boundary lubrication mechanism of nanoparticles was discussed that probably an ultra thin film, which is formed by the melting and elongation of nanoparticles under tribological heat and shear force, attributed to good tribological performance of nanoparticulate as additives.

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“…Other sulfur-containing functional groups such as thiocarbamates and xanthates can be used as ligands for a variety of transition metal-based NPs, but they have lower affinity for the NP surface than thiols [82,116]. On the other hand, xanthates can provide high protection for Au NPs against etching by cyanide.…”

Section: Sulfur-based Ligandsmentioning

confidence: 99%