atomic number 72- a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons hafnium,Hf metal,metallic element- any of several chemical elements that are usually shiny solids that conduct heat or ...
this team was tasked with developing methods of reducing the fissionable products of the Clinton and Hanford production plants to pure metal and fabricating that metal into the components of a deliverable weapon. The weapon had to be small enough that it could be dropped from a plane and simple...
Previous work has demonstrated that energy transferred from the electron beam can influence, melt and even vaporize the different metal nanocrystals52 and recently Cao et al. demonstrated that under the influence of the electron beam, amorphous Au nanocrystal had enough energy to overcome the energy ...
Metal catalysts are widely used in modern chemical industry. Pyrolysis is the most commonly employed protocol to prepare heterogeneous metal-based catalysts with sizes from atom-scale (including single-atom (SA) and subnanocluster) to nanoscale and beyond1,2,3,4,5. Nevertheless, structural and com...
Ytterbium (Yb), chemical element, a rare-earth metal of the lanthanide series of the periodic table. Ytterbium is the most volatile rare-earth metal. It is a soft, malleable silvery metal that will tarnish slightly when stored in air and therefore should
Atomic-layer deposition has been widely used in the fabrication of microelectronic devices, such as high-k and metal gates, n-type metal oxide semiconductor epitaxy (n-MOS epi), and fin field-effect transistors (FinFET). However, as a deposition process, ALD is generally applied to large ...
The alkali metal family includes the six elements in thefirst columnof the periodic table, fromlithium(Li) down to francium (Fr). These metals all contain one valence electron, meaning they form cations and react readily with water. These elements form the ionic bonds known as salts. ...
Category Tonnes eU3O8 Contained Uranium Metal Mt ppm Mlb Indicated 10.1 4,913 109.3 Inferred 4.5 5,243 51.4 The following resource schematic shows the Indicated and Inferred resources as estimated in the MRE. Indicated Resources are shown in purple and Inferred Reso...
on the surface of {100} and {111}-O facets indicates that the first electron transfer step to reduce the adsorbed O2to OOH* is endothermic, which is consistent with observations for the well-developed metal and metal oxide catalysts17,53. Besides, the large negative ...
The edge-to-edge connected metal-semiconductor junction (MSJ) for two-dimensional (2D) transistors has the potential to reduce the contact length while improving the performance of the devices. However, typical 2D materials are thermally and chemically unstable, which impedes the reproducible achievemen...