Tribological Properties of Nanolamellar MoS<sub>2</sub> Doped with Copper Nanoparticles

An, Vladimir; Irtegov, Yuri

doi:10.1155/2014/731073

Cited by 15 publications

(16 citation statements)

References 23 publications

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“…Here, Xia et al [7] have shown that MoS 2 layers doped with Cu ions are ferromagnetic and display a high Curie temperature, which is rather surprising given that Cu is non-magnetic, but is in accord with earlier theoretical predictions [8,9]. Other areas where the combination of Cu and MoS 2 shows promise are tribology (enhanced wear resistance) [10,11], and electrocatalysis (hydrogen evolution reaction) [12].…”

Section: Introductionsupporting

confidence: 66%

Non-equilibrium growth of metal clusters on a layered material: Cu on MoS₂

et al. 2020

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We use a variety of experimental techniques to characterize Cu clusters on bulk MoS 2 formed via physical vapor deposition of Cu in ultrahigh vacuum, at temperatures ranging from 300 K to 900 K. We find that large facetted clusters grow at elevated temperatures, using high Cu exposures. The cluster size distribution is bimodal, and under some conditions, large clusters are surrounded by a denuded zone. We propose that defect-mediated nucleation, and coarsening during deposition, are both operative in this system. At 780 K, a surprising type of facetted cluster emerges, and at 900 K this type predominates: pyramidal clusters with a triangular base, exposing (311) planes as side facets. This is a growth shape, rather than an equilibrium shape.

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Section: Introductionsupporting

confidence: 66%

Non-equilibrium growth of metal clusters on a layered material: Cu on MoS₂

et al. 2020

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confidence: 99%

Simultaneous Fabrication and Functionalization of Nanoparticles of 2D Materials with Hybrid Optical Properties

Ibrahim

Irannejad

Wales

et al. 2018

Advanced Optical Materials

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biomedicine, [2,3] tribology, [4] photonics, [5] and electrocatalysis, [6] among others. Significant progress has been made recently in fabricating and functionalizing 2D nanosheets of transition metal dichalcogenides. [7] This progress has focused on the functionalization of mono-or few-layer nanosheets with lateral dimensions greater than 100 nm by combining chemical exfoliation, [8][9][10][11][12] micromechanical exfoliation, [13] or liquid exfoliation [14] with the reaction of functionalities. The formation and functionalization of smaller 2D nanoparticles or quantum dots, on the other hand, is still in its infancy.In what has been cited as the first direct evidence of covalent functionalization of a nanoscale transition metal dichalcogenide, Tuxen et al. produced MoS 2 monolayer nanoclusters in ultrahigh vacuum on a gold substrate and attached dibenzothiophene molecules to the clusters via controlled vapor exposure. [15,16] Beyond substrate-supported nanoclusters, the functionalization of nongraphene 2D nanoparticles suspended in solution was reported last year. Atkin et al. combined ultrasonication of WS 2 with microwave treatment in a citric acid-containing solution to produce monolayer WS 2 nanosheets ≈20-80 nm in diameter decorated with 2-5 nm carbon dots. [6] Jung et al. impinged BN flakes with super-heated nanoparticles then exposed them to water vapor to produce edge-hydroxylated BN quantum dots with 8 nm lateral size. [2] These techniques for fabricating and functionalizing 2D nanosheets and smaller nanoparticles are relatively slow (in some cases requiring several days), often require dangerous chemicals and elevated temperatures, and their demonstration has been material specific. In the case of functionalized 2D nanoparticles other than graphene, such as functionalized MoS 2 , WS 2 , and BN quantum dots, potentially exciting multifunctional optical properties have not been realized. The ability to produce a variety of hybrid 2D nanoparticles that possess the optical properties of both the host 2D material and functional groups would be extremely valuable for many of the aforementioned applications.We introduce a rapid femtosecond laser technique that simultaneously reduces the dimensions of flakes of 2D materials to a few nanometers and dissociates solvent molecules to bond with the edges of the freshly cleaved 2D sheets, in order to produce functionalized nanoparticles of 2D materials. Etha nol, a common and inexpensive solvent, is used to facilitate functionalization A general, rapid technique is introduced to simultaneously fabricate and functionalize nanoparticles of 2D materials. A femtosecond laser is used to irradiate flakes of 2D materials in an ethanol-containing solvent. The highly energetic laser pulses exfoliate and cleave the flakes into nanosheets with diameters of ≈3 nm and simultaneously dissociate the solvent molecules. The dissociated carbon and oxygen atoms bond with the freshly cleaved 2D nanoparticles to satisfy edge sites, resulting in the formation of hybrid 2D nanoparticles...

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“…Nanopowders produced by EEW reveal higher chemical reactivity (An et al 2010 ), unusual physicochemical properties (An et al 2011 ), can be used for fabrication of nanostructured compounds (Bozheyev et al 2014 ) and for other applications (An and Irtegov 2014 ). In the present work, alumina nanopowders produced by electrical explosion of alumina wires were used in the experiments of spark plasma sintering.…”

Section: Methodsmentioning

confidence: 99%

Spark plasma sintering of alumina nanopowders produced by electrical explosion of wires

Khasanov

Izarra

2015

SpringerPlus

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Alumina nanopowders produced by electrical explosion of wires were sintered using the spark plasma sintering technique. The results of XRD analysis show that the main phase in the compacted nanopowders is α-Al2O3. According to the SEM observations, the sintered alumina nanopowder consists of micron-sized faceted grains and nano-sized necked grains. The increase in sintering temperature resulted in a higher density of the sintered powders: from 78.44 to 98.21 % of theoretical density.

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Tribological Properties of Nanolamellar MoS₂ Doped with Copper Nanoparticles

Cited by 15 publications

References 23 publications

Non-equilibrium growth of metal clusters on a layered material: Cu on MoS₂

Non-equilibrium growth of metal clusters on a layered material: Cu on MoS₂

Simultaneous Fabrication and Functionalization of Nanoparticles of 2D Materials with Hybrid Optical Properties

Spark plasma sintering of alumina nanopowders produced by electrical explosion of wires

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Tribological Properties of Nanolamellar MoS2 Doped with Copper Nanoparticles

Cited by 15 publications

References 23 publications

Non-equilibrium growth of metal clusters on a layered material: Cu on MoS2

Non-equilibrium growth of metal clusters on a layered material: Cu on MoS2

Simultaneous Fabrication and Functionalization of Nanoparticles of 2D Materials with Hybrid Optical Properties

Spark plasma sintering of alumina nanopowders produced by electrical explosion of wires

Contact Info

Product

Resources

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Tribological Properties of Nanolamellar MoS₂ Doped with Copper Nanoparticles

Non-equilibrium growth of metal clusters on a layered material: Cu on MoS₂

Non-equilibrium growth of metal clusters on a layered material: Cu on MoS₂