Alkyl Xanthates:  New Capping Agents for Metal Colloids. Capping of Platinum Nanoparticles

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

doi:10.1021/la0014961

Cited by 37 publications

(39 citation statements)

References 64 publications

(27 reference statements)

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“…In nanochemistry, alkylxanthates were firstly introduced as capping agents. 35,36 Very recently, metal salts of alkylxanthates served as perfect and versatile single-source precursors for synthesizing metal sulfide nanoparticles. 33,37 Cadmium ethylxanthate used in this work is more easily synthesized, air-stable, and even can be used under atmospheric bench-top conditions, which meets the goal of environmentally-friendly synthesis and low cost.…”

Section: Resultsmentioning

confidence: 99%

Controlled synthesis of CdS nanorods and hexagonal nanocrystals

Yang

et al. 2003

J. Mater. Chem.

137

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CdS nanocrystals including nanorods and faceted nanoparticles were prepared via thermolysing cadmium ethylxanthate in hot hexadecylamine (HDA) solution. In order to control the shape and size of the nanocrystals, the influence of reaction conditions (such as reaction temperature, monomer (single-source precursor-cadmium ethylxanthate) concentration and reaction time, etc.) on the morphology, the surface states and the dispersivity of the CdS nanocrystals was comprehensively investigated. The CdS nanocrystals were characterized by means of transmission electron microscopy (TEM), X-ray diffraction (XRD), absorption spectroscopy and photoluminescence spectroscopy. It was found that under the conditions of high monomer concentration and adequate reaction time (3 h), long multi-armed nanorods were produced dominantly when the reaction temperature was not higher than 200 uC, while at high temperature (260 uC), the formation of short single-armed nanorods was preferred. When the monomer concentration was low and the reaction time was much longer (such as 12 h), spherical-shaped nanocrystals were mainly obtained, while if the reaction time was between 4-6 h, faceted nanocrystals were produced. The mechanism of the effect of the reaction conditions on the shape and size of the nanocrystals is discussed. The variation of reaction conditions can shift the reaction system between thermodynamic and kinetic control, which determines the morphology of the resultant nanoparticles. The formation of anisotropic rod-like CdS nanocrystals was found to be a highly kinetics-driven reaction, and a high monomer concentration in the reaction environment is a necessary condition for synthesizing rod-like CdS nanocrystals. By optimal combination of the reaction temperature, monomer concentration and reaction time, size-and aspect ratio-tunable one-dimensional (1D) CdS nanorods and hexagonal-like CdS nanocrystals which self-assembled into supperlattice arrays were obtained.

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Section: Resultsmentioning

confidence: 99%

Controlled synthesis of CdS nanorods and hexagonal nanocrystals

Yang

et al. 2003

J. Mater. Chem.

137

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“…Silver xanthate precursors were synthesized with reference to literature [14,15]. Here we give only a brief introduction.…”

Section: Methodsmentioning

confidence: 99%

Size-controlled synthesis of monodisperse Ag2S nanoparticles by a solventless thermolytic method

Zhang

et al. 2012

Materials Letters

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“…Potassium hexadecylxanthate and ferric hexadecylxanthate [Fe(C 16 H 33 OCS 2 ) 3 ] were synthesized according to the literature method. [20,21] Iron sulfide nanoflowers were prepared by pyrolyzing the aforementioned ferric hexadecylxanthate precursor. Typically, 0.4 g Fe(C 16 H 33 OCS 2 ) 3 was put into a Teflon-lined autoclave.…”

Section: Synthesis Of Iron Sulfide Nanoflowersmentioning

confidence: 99%

Solvent‐free Synthesis of Hexagonal Iron Sulfide Nanoflowers

Wang¹,

Zhou²,

Chang³

et al. 2013

Chin. J. Chem.

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Employing green and economic solvent-free synthesis route, hexagonal iron sulfide (Fe 7 S 8 ) nanoflowers were successfully synthesized for the first time. In the experiment, ferric hexadecylxanthate was used as the precursor, and hexagonal iron sulfide (Fe 7 S 8 ) nanoflowers were obtained by thermal decomposition of the precursor at 260 ℃ without any additional solvent or inert gas protection. The as-prepared iron sulfide nanoflowers were characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The characterization results indicated that the nanoflowers had uniform size distribution with an average size of about 160 nm. The proposed strategy provides a possible general route for the synthesis of other metal chalcogenide nanostructures.

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Alkyl Xanthates: New Capping Agents for Metal Colloids. Capping of Platinum Nanoparticles

Cited by 37 publications

References 64 publications

Controlled synthesis of CdS nanorods and hexagonal nanocrystals

Controlled synthesis of CdS nanorods and hexagonal nanocrystals

Size-controlled synthesis of monodisperse Ag2S nanoparticles by a solventless thermolytic method

Solvent‐free Synthesis of Hexagonal Iron Sulfide Nanoflowers

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