Water adsorption at ionic crystal surfaces

离子晶体表面的水吸附

基本信息

  • 批准号:
    09640393
  • 负责人:
  • 金额:
    $ 1.92万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    1997
  • 资助国家:
    日本
  • 起止时间:
    1997 至 1998
  • 项目状态:
    已结题

项目摘要

1. We have investigated the behavior of water adsorption on alkali halide surfaces in air and at room temperature observed with the non-contact monitoring mode of a scanning force microscope (SFM). We have found a formation of water droplet pattern on LiF(001) surface and thereafter the formation of a uniform film, in the similarway as observed on the BaF2(111) surface. However, there appears to be no water droplet pattern on the NaC(001) surface. The SFM image from the NaF(001) surface has revealed complicated features with water droplet pattern resulting in films formed with different thickness. These results indicate that in those cases where a water-water interaction is stronger than a water-substrate interaction, water droplets would grow easily on the surfaces, but in the opposite case, the uniform film with a monolayer or submonolayer would be formed.2. We have researched water adsorption on an electron irradiated NaF(001) surface. Although water adsortion on the non- electron i … More rradiated surface continues a complicated feature with water islands over several hours, water adsorption on the electron irradiated surface has a fast formation in lh from a water island pattern to a uniform film. This is because the surface irradiated by electrons has surface OH-centers. It is possible, by the electron irradiation technique, to control the wettability of the NaF(001) surface.3. We have discovered the stepwise frictional forces with increasing load and the anisotropy of the frictional forces via a scanning direction. This indicates the discreteness of the effective interaction area between a tip and surface. These experimental results also clarify the influence on the friction due to a surface deformation and/or damage with increasing loads.4. We have studied the nanotribological behavior of C_<60> films formed on a KCl(001) surface at an extremely low load in dry air, using scanning force microscopy (SFM). it has been observed that the SFM tip undergoes molecularly resolved stick-slip motions depending on its scanning direction. The frictional force at 0.024nN load is about one-sixth that at 2nN load, which indicates rolling and/or translation of a C_<60> molecule due to a single-molecule tip-sample contact. Less
1. 我们研究了空气中和室温下碱卤化物表面的水吸附行为,通过扫描力显微镜(SFM)的非接触监测模式观察。我们发现在 LiF(001) 表面形成水滴图案,然后形成均匀的薄膜,与在 BaF2(111) 表面观察到的类似。然而,NaC(001) 表面似乎没有水滴图案。 NaF(001)表面的SFM图像揭示了水滴图案的复杂特征,导致形成不同厚度的薄膜。这些结果表明,当水-水相互作用强于水-基底相互作用时,水滴很容易在表面生长,而在相反的情况下,会形成单层或亚单层的均匀薄膜。2.我们研究了电子辐照的 NaF(001) 表面上的水吸附。尽管非电子辐射表面上的水吸附在数小时内持续呈现水岛的复杂特征,但电子辐射表面上的水吸附在1h内快速形成,从水岛图案到均匀的膜。这是因为被电子照射的表面具有表面OH中心。通过电子辐照技术可以控制NaF(001)表面的润湿性。 3.我们通过扫描方向发现了随着负载增加而逐步出现的摩擦力以及摩擦力的各向异性。这表明尖端和表面之间有效相互作用区域的离散性。这些实验结果还阐明了随着载荷的增加,表面变形和/或损坏对摩擦的影响。4.我们使用扫描力显微镜(SFM)研究了在干燥空气中极低负载下在 KCl(001) 表面上形成的 C_<60> 薄膜的纳米摩擦学行为。据观察,SFM 尖端根据其扫描方向经历分子分辨的粘滑运动。 0.024nN负载时的摩擦力约为2nN负载时的六分之一,这表明由于单分子尖端-样品接触而导致C_<60>分子的滚动和/或平移。较少的

项目成果

期刊论文数量(19)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
三浦浩治、前田啓介、山田哲生: "イオン結晶表面での水のナノクラスターとエピタキシー" 応用物理. 66巻・7号. 946-950 (1997)
Koji Miura、Keisuke Maeda、Tetsuo Yamada:“离子晶体表面上的水纳米团簇和外延”《应用物理学》第 66 卷,第 7 期。946-950 (1997)
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    0
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K.Miura, K.Maeda and T.Yamada: "Water adsorption on alkali halide surfaces in air observed with force microscopy" Materials Science Forum. 239-241. 663-666 (1997)
K.Miura、K.Maeda 和 T.Yamada:“用力显微镜观察空气中碱卤化物表面的水吸附”材料科学论坛。
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    0
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三浦 浩治: "アルカリハライド結晶表面での水の吸着" 表面科学. 17巻・1号. 44-47 (1997)
Koji Miura:“碱金属卤化物晶体表面的水吸附”《表面科学》第 17 卷,第 1. 44-47 期(1997 年)。
  • DOI:
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  • 影响因子:
    0
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Tetsuo Yamada: "Water Adsorption on electron irradiated NaF(001) Surface" Applied Surface Science. (1998)
Tetsuo Yamada:“电子辐照 NaF(001) 表面上的水吸附”应用表面科学。
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  • 影响因子:
    0
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  • 通讯作者:
T.Yamada, K.Miura: "Water adsorption on electron irradiated NaF(001) surface" Applied Surface Science. 130-132. 598-601 (1998)
T.Yamada、K.Miura:“电子辐照的 NaF(001) 表面上的水吸附”应用表面科学。
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MIURA Koji其他文献

MIURA Koji的其他文献

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{{ truncateString('MIURA Koji', 18)}}的其他基金

2 Step Career Education Program Development and Creation of Self-Evaluation System
两步职业教育计划的开发和自我评价体系的创建
  • 批准号:
    17530663
  • 财政年份:
    2005
  • 资助金额:
    $ 1.92万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

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水吸附装置
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