Ca1−xRxCuO2 (R = Sr, La) single crystals with infinite-layer structure: high Ar gas pressure synthesis and properties.

In this study, silver (Ag) nanoparticle thin films were deposited on microscope slide glass and Si wafer substrates using the pulsed-laser deposition (PLD) technique in Ar ambient gas pressures of 1 × 10−3 and 7.5 × 10−1 mbar. AFM analysis has shown that the number of Ag nanoparticles reaching the substrate decreased with increasing Ar gas pressure. As a result of Ar ambient gas being allowed into the vacuum chamber, it was observed that the size and height of Ag nanoparticles decreased and the interparticle distances decreased. According to the absorption spectra taken by a UV–vis spectrometer, the wavelength where the localised surface plasmon resonance (LSPR) peak appeared was shifted towards the longer wavelength region in the solar spectrum as Ar background gas pressure was decreased. This experiment shows that LSPR wavelength can be tuned by adjusting the size of metal nanoparticles, which can be controlled by changing Ar gas pressure. The obtained extinction cross section spectra for Ag nanoparticle thin film was theoretically analysed and determined by using the metal nanoparticle–boundary element method (MNPBEM) toolbox simulation program. In this study, experimental spectrum and simulation data for metal nanoparticles were acquired, compared, and determined to be in agreement.

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Wind Driving Triboluminescence Technology: A Physical Agriculture Method of Pest Insects Control without Pesticides†

E3S Web of Conferences ◽

10.1051/e3sconf/20185304013 ◽

2018 ◽

Vol 53 ◽

pp. 04013

Author(s):

ZHOU Qiang ◽

Wang Jian-chao ◽

Li Zhi-shen

Keyword(s):

Light Emission ◽

Layer Structure ◽

Friction Pair ◽

Blue Emission ◽

Glass Tube ◽

Vertical Axis ◽

Quartz Tube ◽

Cage Structure ◽

Pest Insects ◽

Ar Gas

Some of triboluminescence materials have the property of shortwave light emission, which is possible to make them being used as the light resource of pest-insects phototaxis trapping. The inorganic composite phosphors Sr2MgSi2O7:Ce and organic composite phosphor Mn-PMBB are tested to have the violet-blue spectrum and green spectrum glowing respectively; Their vertical axis wind driving triboluminescence unit is designed and fabricated on the basis of squirrel cage structure friction pair with multi-glass bars against on the cylindrical phosphor. The persistant wind driving tribo-luminescence is obtained in the experiment of wind driving triboluminescence unit. Further the triboplasma of N2 and N2- Ar gases closed in the quartz tube is researched by means of PTFE elctret on quartz tube friction pair, and a high intensity triboplasma light emission with more than 50000 counts is obtained in the span of 310-420nm spectrum that supplies a more suitable shortwave spectrum of phototaxis trapping pest insects. The annular quartz glass tube is designed to constitute PTFE against on quartz friction pair; The triboplasma emission device is fabricated utilizing three stacking layer structure of PTFE-anuular quartz tube friction pairs, and the S-type vertical shaft wind tuebine is used to form the wind driving triboplasma emission unit. The violet-blue emission spectrum of N2-Ar gas troboplasma is obtained in the test of vertical wind driving triboplasma unit.

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Effect of Ar Gas Pressure on Mechanical Properties of Sputtered Ti Thin Films

IEEJ Transactions on Sensors and Micromachines ◽

10.1541/ieejsmas.125.313 ◽

2005 ◽

Vol 125 (7) ◽

pp. 313-318 ◽

Cited By ~ 1

Author(s):

Hirofumi Ogawa ◽

Shinji Kaneko ◽

Kiyoteru Suzuki ◽

Ryutaro Maeda

Keyword(s):

Thin Films ◽

Mechanical Properties ◽

Gas Pressure ◽

Ar Gas

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Effect of Ar Gas Pressure on Magnetic Properties of Sputter-Deposited Fe–Cu Alloys

Japanese Journal of Applied Physics ◽

10.1143/jjap.28.361 ◽

1989 ◽

Vol 28 (Part 1, No. 3) ◽

pp. 361-367 ◽

Cited By ~ 2

Author(s):

Kenji Sumiyama ◽

Koichi Takemura ◽

Noriyuki Kataoka ◽

Yoji Nakamura

Keyword(s):

Magnetic Properties ◽

Gas Pressure ◽

Cu Alloys ◽

Sputter Deposited ◽

Ar Gas

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Gas-pressure chemical vapor transport growth of millimeter-sized c-BAs single crystals with moderate thermal conductivity

Applied Physics Letters ◽

10.1063/1.5034787 ◽

2018 ◽

Vol 112 (24) ◽

pp. 241903 ◽

Cited By ~ 11

Author(s):

Jie Xing ◽

Evan R. Glaser ◽

Bai Song ◽

James C. Culbertson ◽

Jaime A. Freitas ◽

...

Keyword(s):

Thermal Conductivity ◽

Single Crystals ◽

Chemical Vapor ◽

Gas Pressure ◽

Vapor Transport ◽

Chemical Vapor Transport ◽

Pressure Chemical

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Formation of artificially-Layered Thin-Film Compounds Using Pulsed-Laser Deposition

MRS Proceedings ◽

10.1557/proc-388-57 ◽

1995 ◽

Vol 388 ◽

Cited By ~ 1

Author(s):

David P. Norton ◽

B. C. Chakoumakos ◽

D. H. Lowndes ◽

J. D. Budai

Keyword(s):

Thin Film ◽

Pulsed Laser Deposition ◽

Layer Structure ◽

Finite Thickness ◽

Pulsed Laser ◽

Unit Cell ◽

Laser Deposition ◽

Thickness Variation ◽

Infinite Layer ◽

Layered Thin Film

AbstractSuperlattice structures, consisting of SrCuO2, (Sr,Ca)CuO2, and BaCuO2 layers in the tetragonal, "infinite layer" crystal structure, have been grown by pulsed-laser deposition (PLD). Superlattice chemical modulation is observed for structures with component layers as thin as a single unit cell (~3.4 Å), indicating that unit-cell control of (Sr,Ca)CuO2 growth is possible using conventional pulsed-laser deposition over a wide oxygen pressure regime. X-ray diffraction intensity oscillations, due to the finite thickness of the film, indicate that these films are extremely flat with a thickness variation of only ~20 Å over a length scale of several thousand angstroms. Using the constraint of epitaxy to grow metastable cuprates in the infinite layer structure, novel high-temperature superconducting structural families have been formed. IN particular, epitaxially-stabilized SrCuO2/BaCuO2 superlattices, grown by sequentially depositing on lattice-matched (100) SrTiO3 from BaCuO2 and SrCuO2 ablation targets in a PLD system, show metallic conductivity and superconductivity at Tc(onset) ~70 K. these results show that pulsed-laser deposition and epitaxial stabilization have been used to effectively "engineer" artificially-layered thin-film materials.

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