Morphology Control and Functionalization of Nanoporous Metals

纳米多孔金属的形貌控制和功能化

• 批准号: 17560582
• 负责人: TANIMOTO Hisanori
• 金额: $ 2.31万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17560582/
• 关键词: nanoporous metal; gas-deposition method; selective etching; internal surface; surface and interface; electric resistivity; gas absorption; nanofilter; 金属物性; 格子欠陥

Nanoporous (np-) Au membranes with nm sized open channels were prepared by both the gas-deposition (GD) method and selective etching (SE) of Ag from a Au-Ag alloy. The gas permeability measurement and surface observations by using STM and SEM indicated that, the diameter and area density of the channel in GD np-Au were a few nm and about a few% and those of SE np-Au about 10〜60 nm and about 20%, respectively. The diameter and area density of the channels could be reduced by uniaxial compression of SE np-Au. The resistivity R of the SE np-Au membrane with the BET surface area of 6.4 m^2/g was as high as about 25 times higher than that of the bulk Au and that with 32 m^2/g about 400 times higher. Further, the resistivity showed an abrupt decrease by about 0.1% when the atmosphere around the membrane was started to expose to the air from vacuum. In contrast, the atmospheric change from vacuum to the air caused an abrupt increase of the resistivity by 0.1%. This resistivity change was much reduced when the SE np-Au was exposed to the dried air. These observations suggest that desorption and absorption of water molecules was detected as the increase and decrease in the resistivity, respectively.

采用气体沉积 (GD) 方法和选择性蚀刻 (SE) 方法从 Au-Ag 合金中制备出具有纳米尺寸开放通道的纳米孔 (np-) Au 膜，并使用 STM 和 STM 进行气体渗透率测量和表面观察。 SEM结果表明，GD np-Au的孔道直径为几nm，约为百分之几；SE np-Au的孔道直径约为10〜60 nm，约为20%。通过单轴压缩SE np-Au可以降低通道的面积密度，BET表面积为6.4 m^2/g的SE np-Au膜的电阻率R高达约25倍。比块体Au和32 m^2/g高约400倍。此外，当膜周围的气氛开始暴露于真空中的空气时，电阻率突然下降约0.1%。相比之下，从真空到空气的大气变化导致电阻率突然增加0.1%，当SE np-Au暴露于干燥空气时，这种电阻率变化大大减少。这些观察结果表明水分子的解吸和吸收。分别检测为电阻率的增加和减少。

项目成果

ナノポーラス金属メンブランのガス吸着と電気特性3

纳米多孔金属膜的气体吸附和电性能3

• 发表时间: 2008
• 作者: 山本健太;谷本久典;水林博
• 通讯作者: 水林博

Transitional change in grain boundary state of Nanocrystalline Au by stress

应力作用下纳米晶金晶界状态的转变

• 发表时间: 2005
• 作者: N. Yagi;H. Tanimoto;E. Kita;H. Mizubayashi
• 通讯作者: H. Mizubayashi

Morphology Control of Nanoporous Au by Post-Compression

通过后压缩控制纳米多孔金的形态

• 发表时间: 2008
• 期刊: Proc. 5th Int. Conf. Porous Metals and Metal Foaming Technology(Met Foam 2007) (in press)
• 作者: Tanimoto;Hisanori
• 通讯作者: Hisanori

Grain boundary state and plastic deformation of nanocrystalline Au

纳米晶Au的晶界状态与塑性变形

• 发表时间: 2005
• 作者: N. Yagi;H. Tanimoto;E. Kita;H. Mizubayashi
• 通讯作者: H. Mizubayashi

Grain boundary state of nanocrystalline Au II

纳米晶 Au II 的晶界态

• 发表时间: 2007
• 作者: N. Yagi;H. Tanimoto;K. Muto;E. Kita;H. Mizubayashi
• 通讯作者: H. Mizubayashi