Elucidation of pulsed laser-induced morphological changes of gold nanoparticles using transient absorption and single particle spectroscopies

使用瞬态吸收和单粒子光谱阐明脉冲激光诱导的金纳米粒子的形态变化

• 批准号: 23310065
• 负责人: HASHIMOTO Shuichi
• 金额: $ 12.15万
• 依托单位: The University of Tokushima
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23310065/
• 关键词: ナノ材料; 金ナノ粒子; レーザー; 光熱効果; プラズモン; 熱伝導; 形態変化; サイズ減少; 熱移動; バブル; ナノ超臨界; 単一粒子分光; 散乱スペクトル; レーザー誘起形態変化; 時間分解分光

We focused our attention to the fundamental aspects of the laser-gold nanoparticle (Au NP) interaction that leads to the particle heating as well as energy deposition to the surrounding media. The former gives rise to the particle melting, deformation, and ablation, which has discussion on the mechanism. The latter generates medium temperature gradients and bubbles resulting from local heating through the heat transfer from the particle to the surroundings. The laser-Au NP interaction can be applied to the material fabrication such as fine tuning of particle size and size distribution by applying high pressures and nanohole fabrication on glass substrates. We also refer to the importance of temperature measurements in dimension smaller than the diffraction limit. We show that this can be achieved by CW laser-Au NP interaction by using the single particle spectroscopy.

我们将注意力集中在激光-金纳米粒子 (Au NP) 相互作用的基本方面，这种相互作用导致粒子加热以及能量沉积到周围介质。前者引起颗粒熔化、变形和烧蚀，后者对其机理进行了探讨。后者通过从颗粒到周围环境的热传递而产生局部加热而产生介质温度梯度和气泡。激光-Au NP 相互作用可应用于材料制造，例如通过在玻璃基板上施加高压和纳米孔制造来微调颗粒尺寸和尺寸分布。我们还提到了小于衍射极限的尺寸温度测量的重要性。我们表明，这可以通过使用单粒子光谱学的连续激光-金纳米粒子相互作用来实现。

项目成果

Interactions of Lasers with Gold Nanoparticles Leading to the Phase Transformations of the Particles and the Surrounding Media

激光与金纳米颗粒的相互作用导致颗粒和周围介质的相变

• 发表时间: 2012
• 作者: Shuichi Hashimoto;Daniel Werner;Kenji Setoura
• 通讯作者: Kenji Setoura

Observation of Nanoscale Cooling Effects by Substrates and the Surrounding Media for Single Gold Nanoparticles under CW-Laser Illumination

• DOI: 10.1021/nn402863s
• 发表时间: 2013-09-01
• 期刊: ACS NANO
• 影响因子: 17.1
• 作者: Setoura, Kenji;Okada, Yudai;Hashimoto, Shuichi
• 通讯作者: Hashimoto, Shuichi

Mechanistic Aspect of Surface Modification on Glass Substrates Assisted by Single Shot Pulsed Laser-Induced Fragmentation of Gold Nanoparticles

• DOI: 10.1021/jp106830x
• 发表时间: 2011-03-31
• 期刊: JOURNAL OF PHYSICAL CHEMISTRY C
• 影响因子: 3.7
• 作者: Hashimoto, Shuichi;Uwada, Takayuki;Shiraishi, Ryowya
• 通讯作者: Shiraishi, Ryowya

Plasmonic Nanobubble Dynamics on Excitation of Aqueous Colloidal Gold Nanoparticles Observed by Picosecond Transient Spectroscopy

皮秒瞬态光谱观察水胶体金纳米颗粒激发的等离子体纳米气泡动力学

• 发表时间: 2013
• 作者: 酒井大輔;西浦崇雄;角田聡;西井準治;Shuichi Hashimoto
• 通讯作者: Shuichi Hashimoto