Applications of WS2(MoS2) inorganic nanotubes and fullerene-like nanoparticles for solid lubrication and for structural nanocomposites

Rapoport, L.; Fleischer, N.; Tenne, Reshef

doi:10.1039/b417488g

Cited by 328 publications

(202 citation statements)

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“…It forms sandwich interlayer structure created by S-Mo-S layers, which are loosely bound to each other only by van der Waals forces (Rapoport et al 2005). Such structures, at the bulk and nanoscale, exhibit a broad array of applications, such as electrochemical hydrogen storage (Chen et al 2001), cathode material for rechargeable lithium batteries and solar cells (Imanishi et al 1992;Thomalla and Tributsch 2006), electric transport (Kopnov et al 2006), useful solid lubricant (Rapoport et al 2003), an intercalation host (Aharon et al 2006), and field emission tips (Nemanic et al 2003).…”

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confidence: 99%

Innovative biofilm inhibition and anti-microbial behavior of molybdenum sulfide nanostructures generated by microwave-assisted solvothermal route

et al. 2014

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The incessant use of antibiotics against infectious diseases has translated into a vicious circle of developing new antibiotic drug and its resistant strains in short period of time due to inherent nature of microorganisms to alter their genes. Many researchers have been trying to formulate inorganic nanoparticles-based antiseptics that may be linked to broad-spectrum activity and far lower propensity to induce microbial resistance than antibiotics. The way-out approaches in this direction are nanomaterials based (1) bactericidal and (2) bacteriostatic activities. We, herein, present hitherto unreported observations on microbial abatement using non-cytotoxic molybdenum disulfide nanostructures (MSNs) which are synthesized using microwave assisted solvothermal route. Inhibition of biofilm formation using MSNs is a unique feature of our study. Furthermore, this study evinces antimicrobial mechanism of MSNs by reactive oxygen species (ROS) dependent generation of superoxide anion radical via disruption of cellular functions.

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Section: Introductionmentioning

confidence: 99%

Innovative biofilm inhibition and anti-microbial behavior of molybdenum sulfide nanostructures generated by microwave-assisted solvothermal route

et al. 2014

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“…They possess interesting mechanical 7 and electronic properties 8 which find applications in high temperature solid state lubricants and catalysis. 9 Commercial quantities of these structures are 20 synthesised from oxide template which limit the morphology and enhance control 6 . However, since the discovery of graphene in 2004 10 , two dimensional material systems have been in demand.…”

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WS₂ 2D nanosheets in 3D nanoflowers

et al. 2014

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In this work it has been established that 3D nanoflowers of WS2 synthesized by chemical vapour deposition are composed of few layer WS2 along the edges of the petals. An experimental study to understand the evolution of these nanostructures shows the nucleation and growth along with 10 the compositional changes they undergo.The structural analogy of transition metal dichalcogenides 1 to graphite's layered structure, held together by van In this work, a fast, catalyst free and easily scalable chemical vapour deposition (CVD) technique for the controlled synthesis of well-defined tungsten disulphide (WS2) nanomaterials on (100) silicon-based substrates using tungsten(VI)chloride (WCl6-40 2 mmol at 99.9% purity) and sulphur (20 mmol at 80% purity) as precursors is presented in Fig S1. The predominant morphology (>90%) obtained by this process is WS2 nanoflower confirmed using electron microscopy as shown in Fig.1a and the chemistry verified using XRD and Raman in Fig S2. The morphology of the 45 WS2 nanostructures synthesised by the CVD technique can be tailored through the variation of just two key parameters: time 22 , as yet, a detailed analysis of their structure has not been undertaken. This 60 study looks to comprehend the structure of the nanoflower by disassembling it with the help of sonication. The nanoflowers disassembled into triangular petals (flakes) on sonication with one corner always broken, which suggests that these triangles are connected at only one of the edges to form the assembly of 3D 65 nanoflowers. We observed 10-100's of these triangular petals combining together to form spherical nanoflower structures as suggested by Li et al. 22 and evident from the SEM micrograph in Fig 1a. The nanoflowers are made up of molecular sheets stacked 70 together with a lattice spacing of 3.1 Å and lattice fringes of 0.62 nm, inferred for WS2. In Fig 2a, a cluster of the petals which constitute the nanoflowers is visualised from the edge view (beam perpendicular to c-axis), to reveal 6-8 molecular layers of WS2. These WS2 were stacked on top of each other to form the 75 petals. The distribution of the number of molecular layers to form the petal is not very uniform and varies from few layer (2-4) to increased number of layers up to 12/14. With the beam parallel to the c axis, the hexagonal packing can be clearly observed at the edges where the number of layers have reduced considerably to 80 1 µm

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“…[4][5][6][7] These materials are currently being contemplated for numerous applications, in particular, as superior solid lubricants and as impact-resistant nanocomposites. [8] Bulk synthesis of the IFs normally yields quasispherical nanoparticles with at least 20 molecular layers and outer diameters of greater than 30 nm. In early work, the formation of hollow MoS 2 clusters with octahedral or tetrahedral shapes was often observed.…”

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Structure and Stability of Molybdenum Sulfide Fullerenes

et al. 2007

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Applications of WS2(MoS2) inorganic nanotubes and fullerene-like nanoparticles for solid lubrication and for structural nanocomposites

Cited by 328 publications

References 41 publications

Innovative biofilm inhibition and anti-microbial behavior of molybdenum sulfide nanostructures generated by microwave-assisted solvothermal route

Innovative biofilm inhibition and anti-microbial behavior of molybdenum sulfide nanostructures generated by microwave-assisted solvothermal route

WS₂ 2D nanosheets in 3D nanoflowers

Structure and Stability of Molybdenum Sulfide Fullerenes

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Applications of WS2(MoS2) inorganic nanotubes and fullerene-like nanoparticles for solid lubrication and for structural nanocomposites

Cited by 328 publications

References 41 publications

Innovative biofilm inhibition and anti-microbial behavior of molybdenum sulfide nanostructures generated by microwave-assisted solvothermal route

Innovative biofilm inhibition and anti-microbial behavior of molybdenum sulfide nanostructures generated by microwave-assisted solvothermal route

WS2 2D nanosheets in 3D nanoflowers

Structure and Stability of Molybdenum Sulfide Fullerenes

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WS₂ 2D nanosheets in 3D nanoflowers