Gold Nanospheres and Nanonecklaces Generated by Laser Ablation in Supercritical Fluid
Gold Nanospheres and Nanonecklaces Generated by Laser Ablation in Supercritical Fluid
复制标题
超临界流体中激光烧蚀产生的金纳米球和纳米项链
DOI：
10.1021/jp805978g
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发表时间：
2008
影响因子：
3.7
通讯作者：
Takamasa Minami
中科院分区：
文献类型：
--
作者：
K. Saitow;T. Yamamura;Takamasa Minami
在超临界CO2中对金进行纳秒脉冲激光烧蚀，激发波长为532 nm，生成金纳米粒子，然后通过扫描电子显微镜和小角X射线散射对其进行观察，并研究其消光光谱和模拟消光光谱。激光烧蚀过程中，金纳米粒子的形态和数量随着超临界CO2密度的变化而发生显着变化。在气体状密度中，由纳米项链组成的网络结构是主要产物，而在液体状密度中，产生了平均直径（⟨D⟩）为500 nm的大纳米球。吸收激发光的多光子后，⟨D⟩ = 500 nm 的液态金液滴破碎和固化分别生成金纳米项链和大纳米球。两种产物的量根据支化比而变化，这决定了液体金滴是否跟随碎片...
Nanosecond pulsed laser ablation of gold with an excitation wavelength of 532 nm was conducted in supercritical CO2 to generate gold nanoparticles, which were then investigated by scanning electron microscopy and small-angle X-ray scattering, and their extinction spectra and simulated extinction spectra were studied. Both the morphology and amount of gold nanoparticles changed significantly with changes in the density of supercritical CO2 during laser ablation. In a gaslike density, a network structure consisting of nanonecklaces was the major product, whereas in a liquidlike density, large nanospheres with an average diameter (⟨D⟩) of 500 nm were produced. After absorption of multiphoton of excitation light, the gold nanonecklaces and large nanospheres were generated by the fragmentation and solidification, respectively, of liquid gold droplets with ⟨D⟩ = 500 nm. The amount of both products changed according to the branching ratio, which determined whether the liquid gold droplets followed the fragmentat...
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单激光脉冲诱导金纳米颗粒聚集
DOI：
--
发表时间：
2007
期刊：
Physical Chemistry Chemical Physics 9
影响因子：
--
作者：
Muto;Yamada;Miyajima;Mafune
通讯作者：
Mafune
影响因子：
3.3
作者：
Inasawa, S;Sugiyama, M;Yamaguchi, Y
通讯作者：
Yamaguchi, Y
影响因子：
--
作者：
D. Perepichka;F. Rosei
通讯作者：
D. Perepichka;F. Rosei
DOI：
--
发表时间：
2004
期刊：
Journal of the American Chemical Society 126
影响因子：
--
作者：
K.Saitow;D.Kajiya;K.Nishikawa
通讯作者：
K.Nishikawa
影响因子：
3.7
作者：
H. Muto;Kunihiro Yamada;and Ken Miyajima;F. Mafuné
通讯作者：
H. Muto;Kunihiro Yamada;and Ken Miyajima;F. Mafuné