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Yasuyuki Ishikawa

Researcher at University of Puerto Rico

Publications -  236
Citations -  7553

Yasuyuki Ishikawa is an academic researcher from University of Puerto Rico. The author has contributed to research in topics: Fock space & Ion. The author has an hindex of 46, co-authored 236 publications receiving 7172 citations. Previous affiliations of Yasuyuki Ishikawa include University of Puerto Rico, Río Piedras & University of Puerto Rico at Mayagüez.

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Transition energies of atomic lawrencium

TL;DR: In this article, the transition energies of the superheavy element lawrencium, including the ionization potential, excitation energies and electron affinities, were calculated by the intermediate Hamiltonian coupled cluster method.
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Free standing graphene-diamond hybrid films and their electron emission properties

TL;DR: In this paper, a free standing graphene-diamond hybrid films have been fabricated using saturated hydrocarbon polymers as seeding material by hot filament chemical vapor deposition technique and the films are characterized with x-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscope (TEM), and electron energy loss spectroscopic (EELS).
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Relativistic Dirac-Fock and many-body perturbation calculations on He, He-like ions, Ne, and Ar

TL;DR: Relativistic and diagrammatic many-body perturbation-theory calculations have been performed on He, several He-like ions, Ne, and Ar and a solution of the Dirac-Fock equations is obtained by analytic expansion in basis sets of Gaussian-type functions.
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Sequential electrodeposition of Mo at Pt and PtRu methanol oxidation catalyst particles on HOPG surfaces

TL;DR: In this paper, sequential electrodeposition methods were used to prepare PtMo and PtRuMo methanol electrocatalyst particles on previously activated highly oriented pyrolytic graphite (HOPG) substrate.
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A density-functional theory study of electrochemical adsorption of sulfuric acid anions on Pt(111)

TL;DR: A density-functional theory study of the electrochemical adsorption of sulfuric acid anions was conducted at the Pt(111)/electrolyte interface over a wide range of electrode potential, including the anomalous region of the hydrogen voltammogram of this electrode.