Shape control of metal nanonarticles using light irradiation and a micro-sized reaction system

利用光照射和微米反应系统控制金属纳米粒子的形状

• 批准号: 18510098
• 负责人: TSUJI Takeshi
• 金额: $ 2.66万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18510098/
• 关键词: Nanoparticles; Shape control; Photochemistry; Microchip; ナノ材料; 光物性; 表面・界面物性

Shape control of metal nanoparticles is important because many properties of nanoparticles differing from those of bulk metal strongly depend on their shape. Photoirradiation for colloidal particles is interested as a convenient method for the shape control.The aims of the present study are 1) clarifying the mechanism of the photo-induced shape conversions more precisely, and 2) developing a proper system for the investigation using micro-sized systems. As results of the investigation, we have revealed that:The aims of the present study are 1) clarifying the mechanism of the photo-induced shape conversions more precisely, and 2) developing a proper system for the investigation using micro-sized systems. As results of the investigation, we have revealed that:1) Oxidative etching of silver nanoparticles by halogen ions is involved. in the photoinduced shape conversion process. Nanoparticles are etched by halogen ions to form silver ions, which were confirmed by the presence of AgCl_2-in the solutions.2) The nanocrystals are formed from the silver ions. The results of a wavelength dependence study suggested that photoirradiation does not cause photoreduction but control crystal growth via plasmon excitation.3) We have carried out photoirradiation experiments by using microchips. However, sedimentation of nanoparticles on the wall of micro channels significantly occurred.

金属纳米颗粒的形状控制是非常重要的，因为纳米颗粒的许多性质与块体金属的性质不同，很大程度上取决于它们的形状。对胶体粒子的光照射是一种方便的形状控制方法。本研究的目的是1)更精确地阐明光诱导形状转变的机理，2)利用微尺度系统建立合适的研究系统。研究结果表明：本研究的目的是：1)更准确地阐明光诱导形状转变的机制；2)利用微尺度系统建立合适的研究系统。研究结果表明：1)卤素离子对银纳米粒子进行了氧化刻蚀。在光诱导的形状转换过程中。纳米粒子被卤素离子刻蚀形成银离子，这被溶液中AgCl2-的存在所证实。2)纳米晶是由银离子形成的。波长依赖性研究的结果表明，光照射不会引起光还原，而是通过等离子体激发来控制晶体的生长。3)我们利用微芯片进行了光照射实验。然而，纳米颗粒在微通道壁上发生了明显的沉积。

项目成果

Anisotropic shape conversions of silver nanoparticles by laser ablation. -Influence of polymers-

通过激光烧蚀实现银纳米颗粒的各向异性形状转换。

• 发表时间: 2008
• 作者: Ozono;S.;Tsuji;T.;Tsuji;M
• 通讯作者: M

高分子溶液中のレーザーアブレーションにおける銀ナノ粒子生成機構

聚合物溶液中激光烧蚀过程中银纳米颗粒的形成机制

• 发表时间: 2007
• 作者: N.Toriaki;et. al.;原田雅史;辻 剛志; D-H Thang; 仲西 正孝; 岡崎 有起; 坪井 泰之; 辻 正治
• 通讯作者: 辻 剛志; D-H Thang; 仲西 正孝; 岡崎 有起; 坪井 泰之; 辻 正治

液中レーザーアブレーションにおける高分子添加効果

聚合物添加对液体激光烧蚀的影响

• 发表时间: 2007
• 作者: 朝岡秀人;他;辻 剛志; D-H Thang; 岡崎 有起; 仲西 正孝; 辻 正治
• 通讯作者: 辻 剛志; D-H Thang; 岡崎 有起; 仲西 正孝; 辻 正治

Nanosecond Time-Resolved Observations of Laser Ablahon of Siver in Water

水中银激光 Ablahon 的纳秒时间分辨观测

• 发表时间: 2007
• 期刊: Japanese Journal of Applied Physics Part 1 46
• 作者: Tsuji;T; Okazaki;Y; Tsuboi;Y; Tsuji;M
• 通讯作者: M

Photo-induced anisotropic shape conversions of metal nanoparticles

光诱导金属纳米粒子的各向异性形状转换

• 发表时间: 2006
• 期刊: Photochemistry 37, 1
• 作者: Tsuji;T
• 通讯作者: T