Utsunomiya University

About: Utsunomiya University is a education organization based out in Utsunomiya, Japan. It is known for research contribution in the topics: Laser & Holography. The organization has 4139 authors who have published 6812 publications receiving 91975 citations. The organization is also known as: Utsunomiya daigaku.

Rare-earth plasma extreme ultraviolet sources at 6.5―6.7 nm

Abstract: We have demonstrated a laser-produced plasma extreme ultraviolet source operating in the 6.5–6.7 nm region based on rare-earth targets of Gd and Tb coupled with a Mo/B4C multilayer mirror. Multiply charged ions produce strong resonance emission lines, which combine to yield an intense unresolved transition array. The spectra of these resonant lines around 6.7 nm (in-band: 6.7 nm ±1%) suggest that the in-band emission increases with increased plasma volume by suppressing the plasma hydrodynamic expansion loss at an electron temperature of about 50 eV, resulting in maximized emission.

Monodisperse Two-Dimensional Nanometer Size Clusters of Partially Fluorinated Long-Chain Acids

Abstract: Two-dimensional molecular clusters of a few tens nanometer size were found in spread monolayers of a series of partially fluorinated long-chain acids. Atomic force microscopy images have revealed that the size of the clusters is sharply monodisperse. The size changes systematically with changing structure of the hydrophobic chain of the amphiphiles. The smallest cluster has a circular shape of 17 nm diameter. One cluster is composed of about 700 film molecules. These clusters gather to form macroscopic domains of millimeter size without compression. A formation mechanism of these molecular clusters is discussed. Clusters are formed during the spreading process due to the instability of the film materials at the spreading process. It was made clear that cluster formation during the spreading is rather general for amphiphiles under the conditions where condensed monolayers are formed.

Electronic structure of the misfit-layer compounds PbTiS3 and SnNbS3.

Abstract: The compounds ${\mathrm{PbTiS}}_{3}$ and ${\mathrm{SnNbS}}_{3}$ may be classified as misfit-layer compounds with compositions (PbS${)}_{1+\mathit{x}}$${\mathrm{TiS}}_{2}$ or (SnS${)}_{1+\mathit{x}}$${\mathrm{NbS}}_{2}$. Their structure is such that a double layer of PbS or SnS with the TlI structure is inserted into each van der Waals gap of a layered transition-metal disulfide. They may be regarded as intercalation compounds or as materials having a one-dimensional superlattice with an atomic-scale repeat distance. X-ray-photoemission-spectroscopy, x-ray-absorption-spectroscopy, and reflection-electron-energy-loss-spectroscopy spectra are presented and the electronic structures are discussed. It is found that charge transfer occurs from the PbS or SnS layers to the transition-metal disulfide slabs, but the interlayer interaction is so small that the overall features of the valence and conduction bands of each layer are considered to be almost unchanged from those of the bulk compound.