two-phase state of crystallite and grain boundary in nanocrystalline gold stabilized by vacancy-type defects with compositional concentration

纳米晶金中微晶和晶界的两相态由具有成分浓度的空位型缺陷稳定

• 批准号: 22560656
• 负责人: TANIMOTO Hisanori
• 金额: $ 2.83万
• 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: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22560656/
• 关键词: ナノ物性; ナノ材料; 金属物性; 超微細多結晶組織; 結晶粒界; 原子空孔; 格子定数; 力学特性; 格子欠陥; ナノ結晶

We found that nanocrystalline gold (ultrafine polycrystalline with the mean grain size below a few tens nm, n-Au, hereafter) shows characteristic behaviors. We have proposed that a two-phase state with crystallite phase and surrounding grain boundary phase are in quasi-equilibrium. From the anelastic measurement, an increase in grain boundary anelasticity was found at around 200 K. The x-ray diffraction measurement showed that the lattice constant at room temperature was smaller by about 0.05% from that of the conventional polycrystalline gold (poly-Au) and the temperature change of the lattice constant became slightly moderate at around 200 K. These propertie s were recovered to those of poly-Au after grain growth by annealing. It is indicated that the state of the grain boundaries of n-Au is different from that of poly-Au and the lattice contraction play an important role on the quasi-equilibrium of two-phase state.

我们发现，纳米晶金（超细多晶，平均晶粒尺寸低于几十纳米，n-Au，以下）显示出特征行为。我们提出了一个两相状态，微晶相和周围的晶界相处于准平衡状态。从滞弹性测量，晶界滞弹性的增加被发现在200 K左右。X射线衍射测量表明，室温下的晶格常数比常规多晶金（poly-Au）的晶格常数小约0.05%，并且晶格常数的温度变化在200 K附近变得稍微缓和。这些性质恢复到那些poly-Au晶粒长大后，退火。结果表明，n-Au和poly-Au的晶界状态不同，晶格收缩对两相态的准平衡起着重要作用。

项目成果

Au ナノ結晶のパルス通電による組織変化

脉冲激励导致金纳米晶体的组织变化

• 发表时间: 2010
• 作者: 茂木卓也;谷本久典;水林博
• 通讯作者: 水林博

Size-Selective Formation of Hexagonal Silver Nanoprisms in Silver Citrate Solution by Monochromatic-Visible-Light Irradiation

单色可见光照射在柠檬酸银溶液中选择性形成六角银纳米棱柱

• DOI: 10.1021/jp304504c
• 发表时间: 2012
• 期刊: J. Phys. Chem. C
• 影响因子: 3.7
• 作者: H. Tanimoto;S. Ohmura;and Y. Maeda
• 通讯作者: and Y. Maeda

光還元による6角板銀ナノ粒子形成におけるエンブリオについて

光还原六方片银纳米颗粒形成过程中的胚胎研究

• 作者: 大村悟;谷本久典;水林博
• 通讯作者: 水林博

成膜中その場紫外光照射したC60薄膜のポリマー形態と組織

原位紫外光成膜过程中C60薄膜的聚合物形貌与结构

• 作者: 新井大二朗;谷本久典;大伴真名歩;圓谷志郎;松本吉弘;境誠司
• 通讯作者: 境誠司

Effects of Cu Self-Capping and Ta Capping on Nanometer-Sized Cu Films Sputter-Deposited on β-Ta

Cu 自覆盖和 Ta 覆盖对溅射沉积纳米尺寸 Cu 薄膜的影响

• DOI: 10.2320/matertrans.m2010286
• 发表时间: 2011
• 期刊: MATERIALS TRANSACTIONS
• 影响因子: 1.2
• 作者: Tanimoto;H.;Sugimori,T.;Kumamoto;S.;Matsui;H. and Mizubayashi;H.
• 通讯作者: H.