New ways to make moly as it enters nano-phase production

Brookes, Ken

doi:10.1016/s0026-0657(04)00073-6

Cited by 13 publications

(4 citation statements)

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“…However, since Mo is a pure metal with a high melting point, it is difficult to synthesize the Mo micro–nano-sized structures with anisotropy, high crystallinity, and specified morphology without introducing impurities. Until now, Mo nanoparticles with a size of 40–100 nm, a surface area of 1–5 m 2 g –1 , and a very high degree of single crystallization can be prepared through self-propagating high-temperature synthesis, microwave plasma chemical vapor deposition, and other techniques. − Such nanoparticles are commonly isotropic and used as additive powders (e.g., lubricants) in the chemical industry. Some top-down micro-machining techniques then have been used to produce anisotropic single-crystalline Mo micro–nanosized structures.…”

Section: Introductionmentioning

confidence: 99%

Pyramid-Shaped Single-Crystalline Nanostructure of Molybdenum with Excellent Mechanical, Electrical, and Optical Properties

Shen

Han

Zhan

et al. 2020

ACS Appl. Mater. Interfaces

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Specific geometric morphology and improved crystalline properties are of great significance for the development of materials in micro–nano scale. However, for high-melting molybdenum (Mo), it is difficult to get high-quality structures exhibiting a single-crystalline nature and preconceived morphology simultaneously. In this paper, a pyramid-shaped single-crystalline Mo nanostructure was prepared through a thermal evaporation technique, as well as a series of experimental controls. Based on detailed characterizations, the growth mechanism was demonstrated to follow a sequential process that includes MoO2 decomposition and Mo deposition, single-crystalline islands formation, layered nucleation, and competitive growth. Furthermore, the product was measured to show excellent physical properties. The prepared nanostructures exhibited strong nano–indentation hardness, elastic modulus, and tensile strength in mechanical measurements, which are much higher than those of the Mo bulks. In the measurement of electronic characteristics, the individual structures indicated very good electrical transport properties, with a conductance of ∼0.16 S. The prepared film with an area of 0.02 cm2 showed large-current electron emission properties with a maximum current of 33.6 mA and a current density of 1.68 A cm–2. Optical properties of the structures were measured to show obvious electromagnetic field localization and enhancement, which enabled it to have good surface enhanced Raman scattering (SERS) activity as a substrate material. The corresponding structure–response relationships were further discussed. The reported physical properties profit from the basic features of the Mo nanostructures, including the micro–nano scale, the single-crystalline nature in each grain, as well as the pyramid-shaped top morphology. The findings may provide a potential material for the research and application of micro–nano electrons and photons.

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Section: Introductionmentioning

confidence: 99%

Pyramid-Shaped Single-Crystalline Nanostructure of Molybdenum with Excellent Mechanical, Electrical, and Optical Properties

Shen

Han

Zhan

et al. 2020

ACS Appl. Mater. Interfaces

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“…Molybdenum nanoparticles have shown admirable potential in automotive steel parts, ion exchange, separation, catalysis, sensors and biological applications [19][20][21][22][23][24][25][26]. Molybdenum nanocrystals are used in coatings, plastics, textiles, alloys and catalytic applications [19][20][21][22][23][24][25][26]. They act as nutrients in the agricultural field, as enzyme catalyst and raw materials for cyanobacterial growth [27].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a systematic study of the physicochemical properties of nano molybdenum is essential to understand the properties of the materials for the ever-growing applications. A few methods for the production of molybdenum nanoparticles include high-energy mechanical milling, microwave plasma self-propagating high-temperature synthesis and the rotary pusher method [19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, in recent years, molybdenum nanoparticles have shown excellent efficiency when compared with bulk materials. Molybdenum nanoparticles have shown admirable potential in automotive steel parts, ion exchange, separation, catalysis, sensors and biological applications [19–26]. Molybdenum nanocrystals are used in coatings, plastics, textiles, alloys and catalytic applications [19–26].…”

Section: Introductionmentioning

confidence: 99%

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Facile and novel synthetic method to prepare nano molybdenum and its catalytic activity

S¹,

Yuvakkumar²,

Prabha³

et al. 2015

IET nanobiotechnol.

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This study reports on a facile and economical synthetic method to prepare nano molybdenum by solid-state reaction technique. Metallic nano molybdenum was synthesised from molybdenum trioxide, molybdenum IV oxide and molybdenum VI oxide through thermal decomposition technique. Metallic nano molybdenum prepared from molybdenum IV oxide was used to study the catalytic effect of molybdenum nanoparticles on the growth of Anabaena sp. The increase in concentration of nano molybdenum from 0.1 to 100% in BG11 (N⁻ Mo⁻ + nano Mo) medium increases heterocyst frequency. The chlorophyll and protein content in Anabaena sp. was found to improve when compared with bulk molybdenum particles and showed a positive influence to be used as a nano nutrient for Anabaena sp.

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A New Route to Produce Submicron Mo Powders via Carbothermal Pre-reduction Followed by Deep Magnesium Reduction

Wang

Zhang

Chou

2018

JOM

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New ways to make moly as it enters nano-phase production

Cited by 13 publications

References 0 publications

Pyramid-Shaped Single-Crystalline Nanostructure of Molybdenum with Excellent Mechanical, Electrical, and Optical Properties

Pyramid-Shaped Single-Crystalline Nanostructure of Molybdenum with Excellent Mechanical, Electrical, and Optical Properties

Facile and novel synthetic method to prepare nano molybdenum and its catalytic activity

A New Route to Produce Submicron Mo Powders via Carbothermal Pre-reduction Followed by Deep Magnesium Reduction

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