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81.
Maeda H Nanai Y Mizuno K Chiba J Takeshima S Inouye M 《The Journal of organic chemistry》2007,72(23):8990-8993
3-(1-Alkynyl)perylenes undergo oxygenation when subjected to irradiation with visible light under aerated conditions. The structures of novel oxygenated products formed in this manner are assigned as regioisomeric dibenzo[jk,mn]phenanthrene-4,5-diones. 相似文献
82.
83.
The new precursor of Cu–Zn–Sn–O (CZTO) was proposed for Cu2ZnSnS4 (CZTS) thin film fabrication to improve film morphology. The CZTS thin film grown from Cu–Zn–Sn (CZT) precursors has many bumps. We deposited CZTO precursors on Mo/soda-lime glass (SLG) substrates by RF sputtering using a CZT (Cu:Zn:Sn = 2:1:1) target in Ar and O2 atmosphere at various O2 partial pressures (0%, 5%, 17% and 20%). Subsequently, the CZTO precursors were sulfurized in Ar and S atmosphere to fabricate CZTS thin films. The CZTO precursors were amorphous. The morphology of the CZTS thin films was improved by the CZTO precursors. All of the CZTS films fabricated in this study had the same crystal structure. Composition analysis revealed that 50% of O were detected in the CZTO precursor, but O was not detected after sulfurizing process, indicating that O was substituted by S. The CZTS thin film from the CZTO precursor fabricated at O2 partial pressure of 20% had similar composition for solar cell absorber. 相似文献
84.
Highly unusual zinc halide-promoted cyclization of propargyl amide enynes in the presence of an alcohol or a Brønsted acid afforded novel six-membered rings. 相似文献
85.
Tajima O Hayashii H Hazumi M Inami K Iwasaki Y Uehara S Abe K Adachi I Aihara H Anipko D Aulchenko V Bakich AM Barberio E Bedny I Belous K Bitenc U Bizjak I Bondar A Bozek A Bracko M Browder TE Chang MC Chen A Chen KF Chen WT Cheon BG Chistov R Choi Y Choi YK Cole S Dalseno J Danilov M Dash M Drutskoy A Eidelman S Fratina S Gabyshev N Gershon T Go A Gokhroo G Ha H Haba J Hayasaka K Heffernan D Hokuue T Hoshi Y Hou S Hou WS Iijima T Ikado K Ishikawa A Ishino H Itoh R Iwasaki M Kang JH Kataoka SU 《Physical review letters》2007,98(13):132001
We report results of a search for the invisible decay of the Upsilon(1S) via the Upsilon(3S)-->pi+ pi- Upsilon(1S) transition using a data sample of 2.9 fb-1 at the Upsilon(3S) resonance. The data were collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No signal is found, and an upper limit for the branching fraction at the 90% confidence level is determined to be B(Upsilon(1S)-->invisible)<2.5 x 10(-3). 相似文献
86.
We theoretically study the development of quantum turbulence from two counter-propagating superfluids of miscible Bose-Einstein condensates by numerically solving the coupled Gross-Pitaevskii equations. When the relative velocity exceeds a critical value, the countersuperflow becomes unstable and quantized vortices are nucleated, which leads to isotropic quantum turbulence consisting of two superflows. It is shown that the binary turbulence can be realized experimentally in a trapped system. 相似文献
87.
N. A. Inogamov V. V. Zhakhovsky N. Hasegawa M. Nishikino M. Yamagiwa M. Ishino M. B. Agranat S. I. Ashitkov A. Ya. Faenov V. A. Khokhlov D. K. Ilnitsky Yu. V. Petrov K. P. Migdal T. A. Pikuz S. Takayoshi T. Eyama N. Kakimoto T. Tomita M. Baba Y. Minami T. Suemoto T. Kawachi 《Applied physics. B, Lasers and optics》2015,119(3):413-419
88.
Manabe Yoshio Ishino Masato Fuji Hiroshi Kinoshita Junichi Fujioka Kana Yamamoto Kazuhisa 《Optical Review》2022,29(3):267-275
Optical Review - Laser-driven phosphor conversion (PC)-type white light sources are receiving a great deal of attention in next-generation high-intensity lighting and display technologies. Laser... 相似文献
89.
Infrared surface electromagnetic wave spectra, which are obtained by the Otto and Kretschmann configurations, are calculated by the Fresnel formula of stratified layers. The calculated reflectivity is plotted as a function of incidence angle, air gap thickness, metal layer thickness, and wavenumbers. From these calculations, optimum experimental variables for both configurations are predicted in the infrared region. At the optimum angle of incidence, the z-component of the electric field intensity was found to be maximum at the surface of silver. The calculated SEW spectra of a PVAc film on silver show a large value of ΔR and a strong frequency dependence. The Otto configuration has advantages in the mid-infrared region. 相似文献
90.
N. A. Inogamov V. V. Zhakhovsky A. Y. Faenov V. A. Khokhlov V. V. Shepelev I. Y. Skobelev Y. Kato M. Tanaka T. A. Pikuz M. Kishimoto M. Ishino M. Nishikino Y. Fukuda S. V. Bulanov T. Kawachi Y. V. Petrov S. I. Anisimov V. E. Fortov 《Applied Physics A: Materials Science & Processing》2010,101(1):87-96
A short laser pulse in wide range of wavelengths, from infrared to X-ray, disturbs electron–ion equilibrium and increases pressure in a heated layer. The case where the pulse duration τ L is shorter than acoustic relaxation time t s is considered in the paper. It is shown that this short pulse may cause thermomechanical phenomena such as spallative ablation regardless of wavelength. While the physics of electron–ion relaxation strongly depends on wavelength and various electron spectra of substances: there are spectra with an energy gap in semiconductors and dielectrics opposed to gapless continuous spectra in metals. The paper describes entire sequence of thermomechanical processes from expansion, nucleation, foaming, and nanostructuring to spallation with particular attention to spallation by X-ray pulse. 相似文献