We study the hydrogen storage properties o f p lanar boron sheets and com pare them to those o f graphene. T he b inding o f m olecular hydrogen to the boron sheet (0.05 eV ) is stronger than that to graphene. W e find that d ispersion o f alkali m etal (A M = Li, Na, and K) atom s onto the boron sheet m arkedly increases hydrogen binding energies and storage capacities. The unique structure o ...

The object of research is the process circular and surface grinding titanium alloy corrosion-resistant steel, namely, cutting forces arising from mechanical processing. One most problematic areas in work selection required modes, material wheel grain size. In course experiment, we used samples VT8 12Х18N9T on which was studied with wheels made various materials (electrocorundum, cubic boron nit...

BACKGROUND Boron neutron capture therapy (BNCT) is based on the nuclear reaction that occurs when boron-10 is irradiated with low-energy thermal neutrons to yield high linear energy transfer alpha particles and recoiling lithium-7 nuclei. Clinical interest in BNCT has focused primarily on the treatment of high-grade gliomas and either cutaneous primaries or cerebral metastases of melanoma, most...

Abstract The surface finish of ground samples is highly influenced by the grinding parameters, conditions and type wheel. This paper emphasizes on effect various factors such as conditions, wheel operating process parameters like depth cut table speed roughness samples. Two types wheels alumina (Al 2 O 3 ) cubic boron nitride (CBN) were used for AISI D3 tool steel under dry wet conditions. mate...

Boron-boron multiple bonds, such as those found in diborenes and diborynes, are typically stabilized by σ-donor ligands that furnish electron density to these otherwise electron-deficient species. These compounds not only of fundamental importance the study chemical bonding, but can also activate small molecules a chemistry reminiscent carried out transition metals. In pursuit designing new imp...

boron toxicity usually occurs in arid and saline soils. among all the pollutant'sresource, irrigation water is the most important factor in boron elevating in the soil.modification of boron-rich soils is difficult and in this case, resistant varieties can playan important role in increasing the cultivation in areas with high boron level. to assessthe effects of different concentrations of ...

The wear behavior of a single-layer electroplated cubic boron nitride (cBN) grinding wheel was investigated in creep feed Inconel 718 narrow-deep-groove with width 2 mm. In this paper, the protrusion height cBN grits on side edge measured by three-dimensional optical profiler, and scanning electron microscope used to detect topography worn grit nickel bonding layer. investigation results indica...

We describe joint experimental and theoretical studies carried out collaboratively in the authors' labs for understanding the structures and chemical bonding of novel atomic clusters, which exhibit aromaticity. The concept of aromaticity was first discovered to be useful in understanding the square-planar unit of Al4 in a series of MAl4(-) bimetallic clusters that led to discoveries of aromatic...

In past years, topological indices are introduced to measure the characters of chemical molecules. Thus, the study of these topological indices has raised large attention in the field of chemical science, biology science and pharmaceutical science. In this paper, by virtue of molecular structure analysis, we determine the total Szeged index, vertex-edge Wiener index and edge hyper-Wiener index ...

The adsorption of H2O, NH3 and HCOOH as polar probe molecules and C6H6 and CH4 as non-polar ones on a series of zig-zag (n,0) single-walled boron nitride nanotubes (BNNTs) and on a boron-nitride mono-layer (BNML) has been studied by means of B3LYP-D* periodic calculations. Computed electrostatic potential maps for the pristine BN nanomaterials indicate that the smaller the radius, the larger th...