—Molecular Mimic of Solid Catalyst “Metal-organics: Synthetic compound possesses key yet uncommon nanoparticle feature” New ways to synthesize catalytic materials for energy conversion and storage may be possible with a synthetic molecular complex that mimics the shape and reactivity of catalytically active sites in molybdenum disulfide nanoparticles.
by Mitch Jacoby | February 13, 2012
—Imaging Industrial-Type Catalysts “Study yields element-specific, atomic-resolution view of nanostructured solid” By using a novel electron microscopy method, an international team has recorded images of industrial-type nanostructured molybdenum disulfide catalyst particles with element specificity and single-atom resolution (Angew.
by Mitch Jacoby | April 05, 2010
The researchers soaked 10 different layered materials, including graphite and molybdenum disulfide, in liquid ammonia sprinkled with lithium or potassium. The baths enable metal atoms to work themselves between the sheets of a layered material. Once removed from the ammonia, a metal-loaded material is given a dip in aprotic organic solvents. Here, negatively charged single layers of the stacked material, such as molybdenum disulfide, flake off, leaving alkali-metal cations (Nat. Chem. 2016, DOI: 10.1038/nchem.2650). The 2-D flakes can then be transferred to a substrate by simply letting the liquid dry or by electroplating. /articles/94/i47/flaky-solution-improving-coverage-2.html 20161128 Metals and organic solvents help disperse flakes of a variety of 2-D materials to make new substrate coatings Concentrates 94 47 /magazine/94/09447.html A flaky solution for improving coverage of 2-D materials 2-D materials, graphene, ionic solution con scitech Matt Davenport materials Single sheets of bismuth telluride, about 100 nm across, were deposited using an ionic solution of the 2-D material and electroplating.Single sheets of bismuth telluride, about 100 nm across, were deposited using an ionic solution of the 2-D material and electroplating.
by Matt Davenport | November 28, 2016
So spacecraft bearings are typically lubricated with materials like molybdenum disulfide, a solid, inorganic, dry lubricant that can tolerate prolonged exposure to the vacuum of space. Self-lubricating coatings composed of molybdenum disulfide and titanium nitride have been developed for similar applications. Some radiation-resistant, liquid, perfluorinated oils are similar to molybdenum disulfide in that they can endure hostile temperatures and vacuums and dramatically extend the life span of bearings. Really though, there aren’t many practical lubricants for cosmos travel quite yet. And that’s why lubricant innovation now lies at the heart of space exploration.
October 23, 2017
—Catalyst Atoms Pinpointed For Real “” The structure of catalytically active edges of industrial molybdenum disulfide nanocrystal catalysts has been determined on the atomic scale by a team led by researchers at Danish catalyst manufacturer Haldor Topsøe (Angew. Chem. Int. Ed., DOI: 10.1002/anie.201103745).
by Mitch Jacoby | August 29, 2011
—Sizing up nano-MoS2 properties “” Particle size is key to the stabilities and electronic properties of molybdenum disulfide nanoparticles with fullerene-like structures, according to a combined experimental and theoretical investigation (Angew. Chem. Int. Ed. 2007, 46, 623). The materials, which are under study for use as solid lubricants and in other applications, were probed via high-resolution electron microscopy, quantum mechanical calculations, and other techniques by a team of researchers based at the Technical University of Dresden and the Rossendorf Research Center, both in Germany, and at the Weizmann Institute of Science, in Israel.
January 22, 2007
Using synthesis methods to control the size and morphology of single-layered, flat molybdenum disulfide nanoparticles, scientists at the Technical University of Denmark, in Lyngby, have demonstrated that the particles can catalyze the hydrogen evolution reaction (2H+ + 2e- → H2) in solution (Science 2007, 317, 100).
by Mitch Jacoby | July 09, 2007