Inorganic nanotubes and fullerene-like nanoparticles

Tenne, Reshef

doi:10.1557/jmr.2006.0354

Cited by 69 publications

(44 citation statements)

References 108 publications

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“…[2][3][4][5][6][7][8][9] The rich chemical variety of such inorganic nanotubes may lead to substantial opportunity for tuning materials properties. In this manuscript we develop a general model for the structure of multiwalled inorganic tubes.…”

Section: Introductionmentioning

confidence: 99%

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Polygonal model for layered inorganic nanotubes

2009

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Multiwalled inorganic nanotubes with circular cross sections must have either an incoherent interface or a large amount of strain. However, nanotubes with a polygonal cross section can have a coherent interface with considerably less strain. We present a model for polygonal nanotubes with no defects where the chirality of the nanotube determines the shape of the cross section. Circular and polygonal nanotubes are compared based on their strain energy and interfacial energy. We have used first-principles calcuations to parameterize strain and interfacial energy for TiS 2 nanotubes. These calculations show that the polygonal model is energetically favorable to the circular model when the inner radius is above a critical radius, 6.2 Å for a TiS 2 nanotube with ten layers. These results should provide insight into further investigations of nanotube structure and allow computational studies to more accurately predict nanotube properties.

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Section: Introductionmentioning

confidence: 99%

“…3 Numerous other materials of the form MX 2 have shown stability in tubular form. [5][6][7][8][9] Many applications for inorganic nanotubes have been discovered. WS 2 nanotubes have proven to be effective solid lubricants, 22 display shock-wave resistance 23 and have been used as tips in scanning probe microscopy.…”

Section: Introductionmentioning

confidence: 99%

Polygonal model for layered inorganic nanotubes

2009

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“…The use of MoS 2 layered material as an additive to oil is well known, and inorganic fullerenes of WS 2 have been shown to possess excellent lubrication properties outperforming their conventional layered counterparts (MoS 2 and WS 2 crystalline platelets) [4]. So, similar properties have been expected for nanowires.…”

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confidence: 90%

“…Nanotubes and fullerene-like structures were prepared from numerous compounds with layered and recently also nonlayered structure by various groups. Much progress has been achieved in the synthesis of inorganic nanotubes and fullerene-like nanoparticles of WS 2 and MoS 2 and many other metal dichalcogenides over the last few years [2].…”

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confidence: 99%

Tribological properties of composites of polyamide-6 and nanotubes of MoS₂, and nanowires of MoO_(3−x)and Mo₆S₂I₈

Meier

Mrzel

Canales

et al. 2013

Phys. Status Solidi A

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Phone: þ34 976 01 1875, Fax: þ34 976 01 1888Composites of Mo 6 S 2 I 8 -nanowires, MoO (3 À x) -nanowires and MoS 2 -nanotubes with polyamide 6 (PA6) have been prepared in different concentrations up to 4% via melt-mixing using a laboratory twin screw extruder in order to investigate their tribological, mechanical and thermal properties. Chemical and structural composition of these nanowires and nanotubes with similar morphologies seem to play an important role in properties of fabricated polymer composites. Tribological tests were performed on the macroscale using a pin-on-disc (POD) tribometer and the thermal properties of the polymer nanocomposites were measured by differential scanning calorimetry to determine their glass transition temperatures and the levels of crystallinity. The behaviour of the nanowires (Mo 6 S 2 I 8 and MoO (3 À x) ) is different from the nanotubes (MoS 2 ) with respect to the induced effects on the friction coefficient and wear rate in function of concentration. The composites with the nanowires show a significant increase of the E-module of up to 38% at a nanowire concentration of 4 wt% in the glassy state of PA6, estimated from hardness measurements. The reduced friction coefficient and wear rates are related to the increased bulk shear strength of the nanowire polymer composites. In contrasts, nanotubes of MoS 2 did not show this strong reinforcement. The reduced friction coefficients and wear rates of the polymer composites with MoS 2 -nanotubes are predominantly related to the lubricating effect of the MoS 2 -nanotubes at the contact points.

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“…WS 2 nanotubes (NT-WS 2 ) are the analogues of multiwalled CNT and represent folded and nested S-W-S sheets containing six-fold-bonded W atoms sandwiched between three-fold-bonded sulfur atoms [17]. Mass production of NT-WS 2 is based on reduction of WO 3 nanoparticles using a H 2 S/H 2 /N 2 gaseous mixture in fluidizedbed reactors [18].…”

Section: Introductionmentioning

confidence: 99%

Two facile routes for functionalization of WS2 nanotubes with silver nanoparticles

Polyakov¹,

Лебедев²,

Yadgarov³

et al. 2017

Nanosystems: Phys. Chem. Math.

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Silver-coated WS 2 nanotubes (NT-WS 2 ) were successfully synthesized via two wet chemistry techniques. The first employs spontaneous silver nanoparticle growth resulting from an interaction of disulfide nanotubes with AgNO 3 in aqueous suspensions at 100• C without any additional reducing agents or stabilizers. The second utilizes [Ag(NH 3 ) 2 ]OH complex to produce silver nanoparticles upon thermal decomposition. Both techniques are capable of producing Ag-NT-WS 2 nanocomposites containing 5-60 nm silver nanoparticles tightly attached to the nanotubes' surfaces. The hexagonal arrangement of sulfur atoms of the outer WS 2 layer was postulated to facilitate crystallization of silver nanocrystals with hexagonal crystallographic system (4H-Ag). The physical-chemical model for spontaneous AgNP formation is proposed.

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Inorganic nanotubes and fullerene-like nanoparticles

Cited by 69 publications

References 108 publications

Polygonal model for layered inorganic nanotubes

Polygonal model for layered inorganic nanotubes

Tribological properties of composites of polyamide-6 and nanotubes of MoS₂, and nanowires of MoO_(3−x)and Mo₆S₂I₈

Two facile routes for functionalization of WS2 nanotubes with silver nanoparticles

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Inorganic nanotubes and fullerene-like nanoparticles

Cited by 69 publications

References 108 publications

Polygonal model for layered inorganic nanotubes

Polygonal model for layered inorganic nanotubes

Tribological properties of composites of polyamide-6 and nanotubes of MoS2, and nanowires of MoO(3−x)and Mo6S2I8

Two facile routes for functionalization of WS2 nanotubes with silver nanoparticles

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Tribological properties of composites of polyamide-6 and nanotubes of MoS₂, and nanowires of MoO_(3−x)and Mo₆S₂I₈