Applied Science Private University

About: Applied Science Private University is a education organization based out in Amman, Jordan. It is known for research contribution in the topics: Population & Catalysis. The organization has 4124 authors who have published 5299 publications receiving 116167 citations.

Symmetry Switch of Cobalt Ferrocyanide Framework by Alkaline Cation Exchange

Abstract: We observed a reversible symmetry switch of a cobalt ferrocyanide framework by the alkaline cation exchange and resultant control of the optical properties at room temperature.

Tantalum oxide nanomesh as self-standing one nanometre thick electrolyte

Abstract: Tantalum oxide (TaO3) nanosheets coated on the surface of a LiCoO2 cathode decrease its interfacial resistance in a solid-state battery by two orders of magnitude. Since the interfacial resistance is rate-determining in the solid-state system, the interfacial structure of the nanosheet is anticipated to pave the way for realising high-performance solid-state lithium batteries. The reduction in the interfacial resistance also strongly suggests that the TaO3 nanosheet is a self-standing solid electrolyte layer with an ultimate thinness of 1 nm. It has a wide band gap and a mesh structure with openings that are almost the same in size as the lithium ion, which prevents electronic conduction and allows the penetration of lithium ions, respectively.

Overlap valence on 2 + 1 flavor domain wall fermion configurations with deflation and low-mode substitution

Abstract: The overlap fermion propagator is calculated on $2+1$ flavor domain-wall fermion gauge configurations on ${16}^{3}\ifmmode\times\else\texttimes\fi{}32$, ${24}^{3}\ifmmode\times\else\texttimes\fi{}64$ and ${32}^{3}\ifmmode\times\else\texttimes\fi{}64$ lattices. With hyper-cubic (HYP) smearing and low eigenmode deflation, it is shown that the inversion of the overlap operator can be expedited by $\ensuremath{\sim}20$ times for the ${16}^{3}\ifmmode\times\else\texttimes\fi{}32$ lattice and $\ensuremath{\sim}80$ times for the ${32}^{3}\ifmmode\times\else\texttimes\fi{}64$ lattice. The overhead cost for calculating eigenmodes ranges from 4.5 to 7.9 propagators for the above lattices. Through the study of hyperfine splitting, we found that the $O({m}^{2}{a}^{2})$ error is small and these dynamical fermion lattices can adequately accommodate quark mass up to the charm quark. A preliminary calculation of the low-energy constant ${\ensuremath{\Delta}}_{\mathrm{mix}}$ which characterizes the discretization error of the pion made up of a pair of sea and valence quarks in this mixed-action approach is carried out via the scalar correlator with periodic and antiperiodic boundary conditions. It is found to be small which shifts a 300 MeV pion mass by $\ensuremath{\sim}10$ to 19 MeV on these sets of lattices. We have studied the signal-to-noise issue of the noise source for the meson and baryon. We introduce a new algorithm with ${Z}_{3}$ grid source and low eigenmode substitution to study the many-to-all meson and baryon correlators. It is found to be efficient in reducing errors for the correlators of both mesons and baryons. With 64-point ${Z}_{3}$ grid source and low-mode substitution, it can reduce the statistical errors of the light quark (${m}_{\ensuremath{\pi}}\ensuremath{\sim}200--300\text{ }\text{ }\mathrm{MeV}$) meson and nucleon correlators by a factor of $\ensuremath{\sim}3--4$ as compared to the point source. The ${Z}_{3}$ grid source itself can reduce the errors of the charmonium correlators by a factor of $\ensuremath{\sim}3$.

Homogeneous and Heterogeneous Photocatalytic Water Oxidation by Persulfate

Abstract: Photocatalytic water oxidation by persulfate (Na2S2O8) with [Ru(bpy)3]2+ (bpy=2,2′-bipyridine) as a photocatalyst provides a standard protocol to study the catalytic reactivity of water oxidation catalysts. The yield of evolved oxygen per persulfate is regarded as a good index for the catalytic reactivity because the oxidation of bpy of [Ru(bpy)3]2+ and organic ligands of catalysts competes with the catalytic water oxidation. A variety of metal complexes act as catalysts in the photocatalytic water oxidation by persulfate with [Ru(bpy)3]2+ as a photocatalyst. Herein, the catalytic mechanisms are discussed for homogeneous water oxidation catalysis. Some metal complexes are converted to metal oxide or hydroxide nanoparticles during the photocatalytic water oxidation by persulfate, acting as precursors for the actual catalysts. The catalytic reactivity of various metal oxides is compared based on the yield of evolved oxygen and turnover frequency. A heteropolynuclear cyanide complex is the best catalyst reported so far for the photocatalytic water oxidation by persulfate and [Ru(bpy)3]2+, affording 100 % yield of O2 per persulfate.