著者
濱田 幾太郎 杉野 修
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.34, no.12, pp.638-643, 2013-12-10 (Released:2013-12-19)
参考文献数
38
被引用文献数
1 1

We describe our modeling of the electrode/electrolyte interfaces and our simulations of electrochemical reactions (electrode reactions) performed to gain molecular scale understanding of the electrode reactions. Here we focus on our recent first principles molecular dynamics simulations on the hydrogen evolution reaction at a water/platinum interface. We also discuss how to improve the present level of modeling to finally realize the comprehensive and accurate simulation.
著者
松川 宏 大槻 道夫 中野 健
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.36, no.5, pp.222-229, 2015-05-10 (Released:2015-05-26)
参考文献数
23
被引用文献数
1 1

It is widely believed that Amontons’ law of friction holds well in various systems. Here we show based on a numerical calculation and analytical theory that Amontons’ law breaks in viscoelastic materials under certain condition due to the precursor slip prior to the bulk sliding. It is also shown that instead of Amontons’ law new friction law holds, which states that the static friction coefficient decreases as a power functionof load with the power −1/3. The new friction law is verified by the experiment employing polymethyl-methacrylate. The relation between the critical length of the precursor and the static friction coefficient predicted by numerical calculation and analytical theory is also verified.
著者
大野 恭秀 前橋 兼三 松本 和彦
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.34, no.8, pp.426-431, 2013-08-10 (Released:2013-08-17)
参考文献数
9
被引用文献数
1

Chemical and biological sensors based on graphene field-effect transistors (FETs) were described. The transfer characteristics of the graphene FET were changed by the solution pH and the protein adsorption. Especially, the detection limit of the solution pH was 0.03, indicating the high sensitivity. In order to achieve the specific biomolecule sensing, aptamers were used as a receptor material. The aptamer was the single-stranded DNA binding to the specific molecules. The aptamer-modified graphene FET can detect only the target molecule while the graphene FET with the bare graphene channel detects all proteins with charges. These sensing results show that the graphene FET has high potential for the high sensitive biological sensors.
著者
三宅 晃司 相磯 良明 小宮山 真 重川 秀実
出版者
The Surface Science Society of Japan
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.15, no.8, pp.541-544, 1994

Highly oriented pyrolytic graphite treated with NaOH solution was found to form a stage-8 intercalation compound. Superstructures such as 2x2, √3×√3 and noble orthorhombic lattices were observed on the surface, as previously observed on the surfaces of the stage-1 M-GIC (graphite intercalation compound, M=Li, K, Rb, Cs). On the contrary, substrate lattice structure was observed on NaOH-treated MoS<SUB>2</SUB>. In addition, new structures near the Fermi level were found to be formed by NaOH-treatment on the surface.
著者
森 誠之
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.32, no.5, pp.270-278, 2011-05-10 (Released:2011-05-21)
参考文献数
51
被引用文献数
1

Since tribology is defined as a science and technology of friction and wear between two surfaces with relative motion, tribological phenomena are closely related to surface science. Tribological behaviors are strongly affected by the surface structure of moving contacts, on the other hand, the surface structure is dynamically altering by mechanical contacts, which is very complex and dynamically changing with time. Better understanding of tribological phenomena and development of tribo-systems are deeply dependent on advancement of fundamental research which is supported by a variety of modern surface analytical tools and research techniques in surface science using ultra-high vacuum and advanced surface analytical tools. In tribological phenomena, mechanical energy is supplied to contact surfaces, and so there are many phenomena which are waiting to be studied. Fundamental understanding of tribological phenomena on the bases of surface science provides the development of tribological technologies such as friction, wear and lubrication, and then contribute to develop new tribological technologies for energy saving, eco-friendly lubrication as well as improving the efficiency, safety, reliability and life of machines.
著者
山内 淳
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.28, no.3, pp.135-143, 2007-03-10 (Released:2007-04-23)
参考文献数
14
被引用文献数
5

Not only limited to the first-principles calculation, but also for all simulations using computers, it must be pointed out that the output results could be calculated even from the wrong input data or/and unphysical models. Therefore it is necessary to check the calculated results carefully. In this paper, the sampled k-point, cutoff energy, and pseudopotentials are briefly explained to understand the calculational conditions systematically. Then calculated examples are shown for some typical models.
著者
野村 健太郎
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.37, no.12, pp.625-630, 2016-12-10 (Released:2016-12-23)
参考文献数
38

Recent developments in the research field of Dirac and Weyl semimetals are reviewed. We introduce Weyl semimetal which has linear energy dispersion and nontrivial topology in the band structure. One of characteristic phenomena is negative magnetoresistance, which stems from three-dimensional linear dispersion. Another characteristic phenomenon is the anomalous Hall effect which occurs in Weyl semimetals with magnetic order. Fermi arc states appear as surface states localized at the boundary. Type II Weyl semimetals are also argued.
著者
立間 徹
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.29, no.6, pp.350-355, 2008-06-10 (Released:2008-06-22)
参考文献数
27
被引用文献数
1 2

Photoinduced charge separation is possible at interfaces between Au or Ag nanoparticles and TiO2. The charge separation is based on localized surface plasmon resonance of the metal nanoparticles. The Au-TiO2 system can be applied to visible light-responsive photocatalysts and photovoltaic cells. If Ag is used instead of Au, visible light-induced oxidation and UV light-induced re-reduction of Ag nanoparticles are possible. These new photoelectrochemical processes can be applied to multicolor photochromism and photoelectrochemical actuators based on hydrogels.
著者
土屋 範晃 荻野 俊郎
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.26, no.9, pp.518-523, 2005-09-10 (Released:2008-04-08)
参考文献数
12
被引用文献数
1

We have investigated selective growth of carbon nanotubes, such as single-walled nanotubes (SWNTs), multi-walled nanotubes (MWNTs) and carbon nanocoils, using alcohol CVD through a combination of the metal catalysts and growth temperature. In the case of Fe and Co catalysts, SWNTs were grown at 900oC, and MWNTs at 700oC. Using a Ni catalyst, on the other hand, carbon nanocoils with a variety of helical structures were grown at 900oC. We believe that these findings will contribute to progress in the applications of carbon nanotubes to electronic devices.
著者
谷藤 幹子
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.37, no.6, pp.263-267, 2016-06-10 (Released:2016-06-21)
参考文献数
7
被引用文献数
1

In respond to a trend of open science policy in Japan, authors' copyrights in journal articles under a background of open access in science and technology is reported.
著者
井上 滋登
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.32, no.5, pp.287-293, 2011-05-10 (Released:2011-05-21)
参考文献数
20
被引用文献数
1

18-Methyleicosanoic acid (18-MEA) is an unusual branched-chain fatty acid that is covalently bounded, possibly via a thioesteroresterlinkage, to the cuticle surface of hairfiber s. It is also known that the lipid layermakes the hairsur face hydrophobic and acts as a boundary lubricant to decrease friction resistance. 18-MEA can be easily removed; however, underalkaline conditions such as in the presence of hairbleach orper manent waving, the hairsur face becomes hydrophilic and the friction increases. The absence of 18-MEA may influence the sensory perception of hair, making it feel dried or hard to finger/comb through. We also found that exposure to ultraviolet (UV) radiation affects 18-MEA on hair surface using Time of Flight Secondary Ion Mass Spectrometry (TOF-SIMS). We therefore think it is important to study the damage to boundary lipids caused by the external stimuli in daily life. A technology for the deposition of a persistent hydrophobicity to bleached hair surfaces using 18-MEA is reviewed. It was found that the combination of 18-MEA with specific cationic surfactants system makes the bleached hair surface hydrophobic, and its hydrophobicity is maintained even after shampooing. Characterization of adsorbed layers on a mica surface was performed using Atomic Force Microscopy (AFM). The results revealed that system formed an uniform layer with high wear resistance.
著者
小林 一昭
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.28, no.3, pp.129-134, 2007-03-10 (Released:2007-04-23)
参考文献数
40
被引用文献数
3

In this review, we present some relationships between first-principles electronic structure calculations and experiments. Actually, many theoretical and experimental researchers feel an invisible barrier to each other. The purpose of this review is to enhance the understanding each other. We take some examples of the electronic structure calculations and related experiments and discuss this problem.
著者
横山 毅人 田仲 由喜夫
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.32, no.4, pp.202-208, 2011-04-10 (Released:2011-04-19)
参考文献数
50

We study charge transport on the surface state of topological insulator where two-dimensional Dirac electron is generated. We put ferromagnetic insulator or superconductor on the topological insulator and reveal anomalous charge transport on the surface. We first consider the charge transport through a ferromagnetic insulator/ferromagnetic insulator (FI/FI) junction on a topological insulator. The resulting conductance across the interface depends sensitively on the directions of the magnetizations of the two FI, showing anomalous behaviors compared with the conventional spin valve. It is found that the conductance depends strongly on the in-plane direction of the magnetization. Moreover, in sharp contrast to the conventional magnetoresistance effect, the conductance at the parallel configuration can be much smaller than that at the antiparallel configuration. We also study the transport properties of a normal metal (N)/FI/superconductor (S) junction formed on the surface of a three-dimensional topological insulator, where chiral Majorana edge mode exists at the FI/S interface. We find that the chiral Majorana edge mode generated in N/FI/S junction strongly influences the charge conductance.
著者
湯澤 哲夫 久保田 純 近藤 淳子 堂免 一成 廣瀬 千秋
出版者
The Surface Science Society of Japan
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.15, no.6, pp.359-363, 1994-08-10 (Released:2009-08-07)
参考文献数
23

Coadsorption-induced recombination of surface hydroxyl species (OD(a)) on Ni (110) was verified by infrared reflection absorption spectroscopy (IRAS) and temperature programmed desorption (TPD). The O-D stretching mode of the surface hydroxyl species appeared at 2650 cm-1 at 173 K on D2O/ONi (110) surface. The hydroxyl species were thermally recombined and desorbed as D2O from the Ni (110) surface at 350 K. The recombination of the OD species to water (2731 and 2567 cm-1), was also observed at a lower temperature (117 K) when CO was coadsorbed. This OD recombination induced by CO adsorption is considered to result from a strong effect of coadsorbed CO, which lowers the reaction temperature from 350 to 117 K.
著者
山口 義彰 河上 貴聡
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.34, no.6, pp.290-295, 2013-06-10 (Released:2013-06-22)
参考文献数
10

An Electrochemical Atomic Force Microscope (EC-AFM) was used to observe the surface reaction of lead electrode in sulfuric acid electrolyte, when the reaction corresponding to what occurs at the electrode of a lead-acid battery takes place. At first, the morphology change at the surface of the lead electrode during Cyclic-Voltammetry measurement could be observed by using EC-AFM. After that, behavior of PbSO4 crystals during open-circuit standing after oxidation was observed by in-situ EC-AFM, and the degradation of charge acceptance performance of lead-acid batteries during open-circuit standing after discharge could be explained by this observation result. In this paper, we introduce some technique with using EC-AFM for understanding of the electrochemical reaction at solid/liquid interface in the lead-acid battery.
著者
堀切川 一男 山口 健
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.26, no.12, pp.762-765, 2005-12-10 (Released:2007-08-09)
参考文献数
6
被引用文献数
1

It was found that the key points of time reduction of bobsleigh were to reduce friction resistance between the runner and ice, and to improve the start technique, from the results of bobsleigh's dynamic analysis. Then, the authors designed and manufactured a new bobsleigh runner based on elastic-plastic contact analysis, which realized minimum contact area between the runner and ice within the shape that prevents ploughing term in friction force. The developed bobsleigh runner based on the analysis was named as “Nagano Special”. Additionally, the authors suggested a new start technique called “Keri-Nori”, which was quite different from the conventional start technique of the Japanese bobsleigh team, and verified its benefit. By using the newly developed bobsleigh runner “Nagano Special” and the new start technique “Keri-Nori”, the Japanese bobsleigh team took the 4th place among the world 44 teams in the international official tryout held on February 1998 just before Nagano Olympic Games.
著者
岩井 洋 角嶋 邦之 川那子 高暢
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.33, no.11, pp.600-609, 2012-11-10 (Released:2012-11-20)
参考文献数
48

MOSFET is a key component for integrated circuits which controls and helps the human activities in modern society. The demands for high performance and low power MOSFETs become stronger and stronger with the progress of smart society. Gate stack is the most critical element of the MOSFETs which controls its operation. In this report, after the explanation of the overall basics of the gate stack technology, recent status of the gate stack R & D are reviewed, focusing on that for high-k/metal gate stack.
著者
佐久間 怜
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.29, no.4, pp.264-268, 2008-04-10 (Released:2008-04-20)
参考文献数
20
被引用文献数
2 2

The electronic structures of many materials can be well described by the one-particle picture within the band theory. A quantitative evaluation of band gaps in semiconductors and insulators, however, needs special care because the subtle balance between the exchange and correlation effects must be properly taken into account. This article reviews theoretical approaches for calculating band gaps of materials based on 1) many-body perturbation theory, 2) density-functional theory, and 3) wavefunction-based theory, and the advantages and of each theory disadvantages are discussed.

2 0 0 0 OA 足元を固める

著者
荻野 俊郎
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.38, no.1, pp.1-2, 2017-01-10 (Released:2017-01-23)
著者
田中 慎一郎 間瀬 一彦
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.23, no.12, pp.753-758, 2002-12-10 (Released:2008-10-09)
参考文献数
18

The core-level-excitation-induced ion desorption from surface is investigated. Two studies using electron-ion coincidence spectroscopy are shown. On Si(100)/H2O surface, it is shown that ion desorption is mainly induced by the shake-up/off excitation accompanying the Auger decay when the photon energy is near the O1s threshold. At a photon energy higher than the shake-up threshold, most of ions desorb resulting from the shake-up excitation accompanying the core-excitation. In both cases, the desorption is induced by the multi-hole final state. On ice surface, the kinetic energy of O1s photoelectrons gives the highest coincidence yield of H+ desorption is shifted by about −0.7 eV compared to the O1s peak observed in the conventional core-level photoelectron spectroscopy. It is ascribed to a core-level shift in the O1s level from which hydrogen ions desorb.