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21.
Zhipeng Wang Mohd Zamri Mohd Yusop Takehiko Hihara Akari Hayashi Yasuhiko Hayashi Masaki Tanemura 《Applied Surface Science》2010,256(21):6371-3173
The irradiation of graphite surfaces with a simultaneous Fe supply have resulted into the development of various types of carbon nanocomposites. Their morphologies - diameter, density, length and apex angle strongly depend on the ratios of Fe deposition rate (DFe) to ion sputtering rate (Sion). By optimizing the ratio of DFe/Sion (2.40%), the denser and well-aligned Fe-carbon nanocomposite fibers (Fe-CNFs) could be obtained, whose average length and diameter were 0.95 μm and 17 nm, respectively. As confirmed by energy-dispersive X-ray analysis, the Fe-CNFs with amorphous-like or fine-polycrystalline phase were surely composed of carbon and Fe. Two types of growth models have been employed to explain the formation of metal-carbon nanocomposites. 相似文献
22.
Mengjie Song Chaobin Dang Eiji Hihara 《Journal of Thermal Analysis and Calorimetry》2020,140(1):199-211
Journal of Thermal Analysis and Calorimetry - Biobased odd–odd poly(propylene dicarboxylate)s, based on 1,3-propanediol and three odd diacids [i.e., glutaric acid (C5), pimelic acid (C7) or... 相似文献
23.
K. Kojima K. Ohbayashi T. Hihara S. Kunii T. Komatsubara T. Kasuya 《Physics letters. A》1979,72(1):51-52
Raman spectra of phonons in CeB6 were measured. The observed three peaks were assigned to the A1g, Eg and F2g phonon modes. The frequencies of the modes suggest that the Ce ion is in the trivalent state. 相似文献
24.
The interaction between interstitial hydrogen and substitutional solute atoms has been investigated by the measurements of the hydrogen solubility and the influence of hydrogen charging on the half-width of the X-ray reflection lines in pure Nb, Nb-5%V, Nb-5%Mo and Nb-5%Ta alloys. In Nb-5%V and Nb-5%Mo alloys, the solubility considerably increases with respect to pure Nb. On the other hand, the solubility hardly changes in Nb-5%Ta alloy. With addition of hydrogen, the half-widths in pure Nb and Nb-5%Ta alloy show a monotonic increase, but in Nb-5%V and Nb-5%Mo alloys they show a minimum. The results are explained by the interaction of hydrogen with substitutional solute atoms. The interaction is considered to be caused by the internal strain induced by the difference in atomic radii between substitutional and solvent (Nb) atoms. 相似文献
25.
H Fujiwara H Kadomatsu M Kurisu T Hihara K Kojima T Kamigaichi 《Solid State Communications》1982,42(7):509-511
The weak field a.c. susceptibility of EuSe was measured as functions of temperature from 1.5 to 15 K and of hydrostatic pressure up to 15 kbar. The Néel temperature did not change with pressure, and a new pressure-induced ferromagnetic phase appeared in the region above 4.6 K and above 4.5 kbar (triple point). 相似文献
26.
Journal of Solid State Electrochemistry - In the present study, an all-solid-state half-cell Li/ amorphous Si (a-Si) was fabricated using the guest Li+ ion conductor (15NaI∙LiBH4) as a solid... 相似文献
27.
Journal of Solid State Electrochemistry - In the present work, the dominant Li+ conduction in 6 mol% LiI-doped KI-KBH4 solid solvent was verified by electrochemical measurement and... 相似文献
28.
Endo A Yamaura T Yamashita K Matsuoka F Hihara E Daiguji H 《Journal of colloid and interface science》2012,367(1):409-414
Zr-doped mesoporous silica with a diameter of approximately 3.8 nm was synthesized via an evaporation-induced self-assembly process, and the adsorption-desorption isotherms of water vapor were measured in the temperature range of 263-298 K. The measured adsorption-desorption isotherms below 273 K indicated that water confined in the mesopores did not freeze at any relative pressure. All isotherms had a steep curve, resulting from capillary condensation/evaporation, and a pronounced hysteresis. The hysteresis loop, which is associated with a delayed adsorption process, increased with a decrease in temperature. Furthermore, the curvature radius where capillary evaporation/condensation occurs was evaluated by the combined Kelvin and Gibbs-Tolman-Koening-Buff (GTKB) equations for the modification of the interfacial tension due to the interfacial curvature. The thickness of the water adsorption layer for capillary condensation was slightly larger, whereas that for capillary evaporation was slightly smaller than 0.7 nm. 相似文献
29.
Fan-Yong Ran Masaki Tanemura Yasuhiko Hayashi Takehiko Hihara 《Journal of Crystal Growth》2009,311(17):4270-4274
Wurtzite structure ZnO films doped with ~2 at% Cu were deposited at substrate temperatures (Ts) from 350 to 600 °C by helicon magnetron sputtering. All the films exhibited room-temperature (RT) ferromagnetism (FM) and the maximum saturation magnetization (Ms) was 1.2 emu/cm3 (~0.15 μB/Cu). Cu ions were mainly in a divalent state as identified by X-ray photoelectron spectroscopy. FM tended to increase with decreasing Ts, and vacuum annealing enhanced the Ms. These results suggested that oxygen vacancies and/or zinc interstitials might contribute to the ferromagnetic performance. Thus, the observed FM was explained in terms of the defect related mechanism. 相似文献