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排序方式: 共有432条查询结果,搜索用时 359 毫秒
421.
Takuya Okazaki Hiroaki Taniguchi Hajime Wagata Mizuki Ito Hideki Kuramitz Tomoaki Watanabe 《Electroanalysis》2020,32(8):1681-1688
We present a novel zinc oxide (ZnO) optically transparent electrode (OTE) prepared by the spin‐spray technique for spectroelectrochemistry. The spin‐spray technique can deposit ZnO film at a low cost, high rate deposition, and at a low temperature (<100 °C) in a single step. This new technique provides good optical transparency and electrical conductivity for ZnO. The electrochemical and spectroelectrochemical properties of the ZnO electrode were investigated for varying thicknesses of ZnO using methylene blue as a redox indicator. A ZnO OTE chip that includes three electrodes on a glass chip was developed for thin‐layer spectroelectrochemistry. Moreover, the ZnO films were successfully applied in an electrochemical‐localized surface plasmon resonance (LSPR) method for methylene blue detection by using them as a transparent conducting substrate for loading gold nanoparticles. 相似文献
422.
A Sinc-collocation scheme for Fredholm integral equations of the second kind was proposed by Rashidinia–Zarebnia in 2005.
In this paper, two improved versions of the Sinc-collocation scheme are presented. The first version is obtained by improving
the scheme so that it becomes more practical, and natural from a theoretical view point. Then it is rigorously proved that
the convergence rate of the modified scheme is exponential, as suggested in the literature. In the second version, the variable
transformation employed in the original scheme, the “tanh transformation”, is replaced with the “double exponential transformation”.
It is proved that the replacement improves the convergence rate drastically. Numerical examples which support the theoretical
results are also given. 相似文献
423.
Electron-donating molecular tips were used for the observation of single-walled carbon nanotubes (SWNTs). Defects in SWNTs were selectively visualized at the atomic scale on the basis of charge-transfer interaction with the molecular tip. 相似文献
424.
425.
Y. Boyarintseva N. Shiran A. Gektin V. Nesterkina K. Shimamura E. Villora 《Radiation measurements》2010,45(3-6):340-342
The radiation stability of the mixed crystals M1 ? xRxF2 + x (M = Ca, Sr, Ba) depends on types of the alkaline-earth and rare-earth ions. Different to Eu- and Ce-containing systems, M1 ? xPrxF2 + x solid solutions have a low radiation resistance, which may be associated with hole trapping on praseodymium ion according to the reaction Pr3+ → Pr4+ which is typical for praseodymium. The coloration efficiency of M1 ? xPrxF2 + x crystals grows in the row Ca → Sr → Ba, which is explained satisfactorily within the model of rare-earth clusters, the structure of which is determined by the ratio of the base alkaline-earth cation to the praseodymium ion radii. 相似文献
426.
Tomoaki Terabayashi Dr. Eiichi Kayahara Yichen Zhang Dr. Yoshiyuki Mizuhata Dr. Norihiro Tokitoh Prof. Dr. Tohru Nishinaga Prof. Dr. Tatsuhisa Kato Prof. Dr. Shigeru Yamago 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2023,135(2):e202214960
Mono-alkene-inserted [n]cycloparaphenylenes 1 [(ene)-[n]CPP] with n=6, 8, and 10, mono-ortho-phenylene-inserted [6]CPP 2 , and di-alkene-insertved [n]CPP 3 [(ene)2-[n]CPP] with n=4, 6, and 8 were synthesized by fusing CPP precursors and alkene or ortho- phenylene groups through coupling reactions. Single-crystal X-ray diffraction analyses reveal that the strips formed by the π-surfaces of 1 and 2 exhibited a Möbius topology in the solid state. While the Möbius topology in the parent 1 and 2 in solution was lost due to the free rotation of the paraphenylene unit even at low temperatures, ene-[6]CPP 4 with eight 1-pyrrolyl groups preserved the Möbius topology even in solution. Despite a twist, 1 has in-plane conjugation and possesses a unique size dependence of the electronic properties: namely, the opposite size dependency of the HOMO–LUMO energy relative to conventional π-conjugated molecules. 相似文献
427.
Prof. Ryo Ohtani Jianeng Xu Dr. Junichi Yanagisawa Yuudai Iwai Takumi Ehara Dr. Kiyoshi Miyata Prof. Ken Onda Dr. Jenny Pirillo Prof. Yuh Hijikata Tomoaki Hiraoka Prof. Shinya Hayami Dr. Benjamin Le Ouay Prof. Masaaki Ohba 《Angewandte Chemie (International ed. in English)》2023,62(32):e202306853
We synthesized a (1-propylpyridinium)2[ReN(CN)4]-type organic–inorganic hybrid exhibiting water-vapor-induced drastic structural changes of the [ReN(CN)4]2− assemblies. Specifically, upon exposure to water vapor, dehydrated nitrido-bridged chains were converted to hydrated cyanido-bridged tetranuclear clusters via rearrangements of large molecular building units in the crystals. These switchable assembly forms display substantially different photo-physical properties, although in both cases the emission is caused by a metal-centered d–d transition. The nitrido-bridged chain exhibited a near-infrared (749 nm) emission, which blue-shifted as the temperature increased, while a visible (561 nm) emission and its red shift was demonstrated by the cyanido-bridged cluster. 相似文献
428.
Hideyuki Kaneko Shingo Matsuo Nobuo Kawahara Junji Saito Tomoaki Matsugi Norio Kashiwa 《Macromolecular Symposia》2007,260(1):9-14
Isotactic polypropylene-based graft copolymers linking poly(methyl methacrylate), poly(n-butyl acrylate) and polystyrene were successfully synthesized by a controlled radical polymerization with isotactic polypropylene (iPP) macroinitiator. The hydroxylated iPP, prepared by propylene/10-undecen-1-ol copolymerization with a metallocene/methyl-aluminoxane/triisobutylaluminum catalyst system, was treated with 2-bromoisobutyryl bromide to produce a Br-group containing iPP (PP-g-Br). The resulting PP-g-Br could initiate controlled radical polymerization of methyl methacrylate, n-butyl acrylate and styrene by using a copper catalyst system, leading to a variety of iPP-based graft copolymers with a different content of the corresponding polar segment. These graft copolymers demonstrated unique mechanical properties dependent upon the kind and content of the grafted polar segment. 相似文献
429.
430.
Takuya Okazaki Masaki Yoshioka Tatsuya Orii Akira Taguchi Hideki Kuramitz Tomoaki Watanabe 《Electroanalysis》2023,35(3):e202380301
We present an electrochemical-lossy mode resonance (LMR) sensing method that detects refractive indices and electroactive species. The LMR peaks of indium-tin-oxide in the transmittance-wavelength spectra were significantly shifted as the applied potential between 1.0 and −0.5 V at 209 nm/V. The modulation was exploited for sensing the refractive index and electroactive species (ferrocyanide and methylene blue) in two ways: peak-wavelength tracking and potential scanning. The potential-scanning technique produced clear potential LMR peaks in the transmittance-potential spectra for the first time, which were corresponded to the external refractive index. Meanwhile, the limits of detection of ferrocyanide and methylene blue were 7.5 and 25.3 μM, respectively, in peak-wavelength tracking and 18.2 and 20.8 μM, respectively, in the potential scanning technique. 相似文献