Formation of metal nanoparticles tailored by dynamic oblique deposition for plasmonic applications

通过动态倾斜沉积形成用于等离子体应用的金属纳米颗粒

• 批准号: 17310073
• 负责人: SUZUKI Motofumi
• 金额: $ 4.44万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 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-17310073/
• 关键词: Nanomaterials; Surface and interfaces; Optical properties; Self-assembly; 動的斜め蒸着; 金属ナノ粒子; 局所プラズモン

Using a dynamic oblique angle deposition technique, we demonstrate the direct formation of Ag and Au nanorods with quasi-parallel major axes on a template layer of oxide having a strongly anisotropic surface morphology. The optical properties of the nanorods are tuned by varying the deposition conditions without any pre- or posttreatment, and the resulting nanorod arrays exhibit high surface-enhanced Raman scattering (SERS) activity. In addition to high macroscopic uniformity over a large area, our nanorod arrays contain a high density of isolated minerals. Using the optimum Ag nanorod arrays, the SERS imaging of the microdroplets of a rhodamine 6G solution is successfully demonstrated The space resolution of the imaging is of the order of at least a few μm. These features are suitable for the SERS imaging of biomaterials. In addition, we demonstrate the growth of unusual metal whiskers by glancing angle deposition on a high temperature (HT-GLAD) substrate, while the usual columnar structures completely disappear due to accelerated surface diffusion. HT-GLAD is essential fur the nucleation of the whiskers and efficient supply of metal atoms on the side surface of the vertically growing whiskers. HT-GLAD will, for the first time, reveal the mechanisms fm the vapor growth of metal whiskers.

使用动态倾斜角度沉积技术，我们在具有强烈各向异性表面形态的氧化物模板层上展示了具有准平行主要轴的Ag和Au纳米棒的直接形成。纳米棒的光学特性是通过改变沉积条件而没有任何前或处理后来调节的，并且所得的纳米棒阵列暴露了高表面增强的拉曼散射（SERS）活性。除了大面积的高宏观均匀性外，我们的纳米棒阵列还含有高密度的孤立矿物质。使用最佳Ag纳米棒阵列，成功证明了成像的空间分辨率至少为几μm。这些特征适用于生物材料的SERS成像。此外，我们通过在高温（HT-GLAD）底物上瞥了一眼角度沉积来证明异常金属晶须的生长，而通常由于加速的表面扩散而完全消失了通常的柱状结构。 HT-Glad是晶须的成核和垂直生长晶须侧面的金属原子的有效供应。 HT-Glad将首次揭示金属晶须蒸气生长的机制。

项目成果

Selective Growth of Al Nano-whiskers on the Patterned Substrate by Glancing Angle Deposition at High Temperature

高温掠射角沉积在图案化衬底上选择性生长铝纳米晶须

• 发表时间: 2007
• 期刊: Mater. Res. Soc. Symp. Proc 1054(in press)
• 作者: M.;Suzuki;R.;Kita;K.;Hamachi;K.;Nagai;K.;Nakajima;K.;Kimura
• 通讯作者: Kimura

光学的センサ及びその製造方法

光学传感器及其制造方法

• 发表时间: 2005

Ag nanorod arrays tailored for surface-enhanced Raman imaging in the near-infrared region

• DOI: 10.1088/0957-4484/19/26/265304
• 发表时间: 2008-07
• 期刊: Nanotechnology
• 影响因子: 3.5
• 作者: Motofumi Suzuki;Wataru Maekita;Y. Wada;K. Nagai;K. Nakajima;K. Kimura;T. Fukuoka;Yasushige Mori

Subsurface structures in initial stage of FeSi2 growth studied by high-resolution Rutherford backscattering

通过高分辨率卢瑟福背向散射研究 FeSi2 生长初始阶段的地下结构

• 发表时间: 2007
• 期刊: Thin Solid Films 515
• 作者: M. Suzuki;他
• 通讯作者: 他

Stable and Reproducible Chain-like Assembly of Gold Nanoparticles for Surface-enhanced Raman Scattering

用于表面增强拉曼散射的金纳米粒子的稳定且可重复的链状组装

• 发表时间: 2005
• 作者: T. Fukuoka;他
• 通讯作者: 他