In situ UV-vis investigation of growth of gold nanoparticles prepared by solution plasma sputtering in NaCl solution
In situ UV-vis investigation of growth of gold nanoparticles prepared by solution plasma sputtering in NaCl solution
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DOI：
10.1016/j.apsusc.2015.04.139
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发表时间：
2015-11-01
影响因子：
6.7
通讯作者：
Yagi, Shinya
中科院分区：
文献类型：
--
作者：
Mizutani, Tsuyoshi;Ogawa, Satoshi;Yagi, Shinya
通过溶液等离子体溅射在不同浓度的 NaCl 溶液中制备金纳米颗粒。通过原位紫外-可见 (UV-vis) 光谱测量这些溶液在等离子体处理期间和之后的吸收光谱，以估计金的粒径和浓度。通过透射电子显微镜(TEM)观察获得粒径分布。这些实验表明，约2.2 nm的金纳米颗粒是由等离子体相直接形成的，并且直径随着时间的推移而增加。这些粒径的增加是由金纳米粒子在 NaCl 溶液中的奥斯特瓦尔德熟化引起的。我们使用原位紫外-可见光谱估计了金纳米颗粒在 NaCl 溶液中不溶解的平衡直径。在 3、5 和 10 mM NaCl 溶液中，这些直径分别约为 5、7 和 10 nm。我们可以控制在 NaCl 溶液中通过溶液等离子体溅射制备的金纳米粒子的直径。 (C) 2015 Elsevier B.V. 保留所有权利。
Gold nanoparticles are prepared in various concentrations of NaCl solutions by solution plasma sputtering. The absorption spectra of these solutions during and after the plasma process are measured by in situ ultraviolet-visible (UV-vis) spectroscopy to estimate the particle diameters and concentrations of gold. The distributions of particle diameters are obtained by transmission electron microscope (TEM) observations. These experiments indicate the gold nanoparticles with about 2.2 nm are directly formed by plasma phase and the diameters are increasing over time. These increases of particle diameters are caused by Ostwald ripening of gold nanoparticles in NaCl solution. We estimate the equilibrium diameter at which the gold nanoparticles are not solved in NaCl solution using in situ UV-vis spectroscopy. These diameters are about 5, 7 and 10 nm in 3, 5 and 10 mM NaCl solution, respectively. We make it possible to control the diameter of gold nanoparticles prepared by solution plasma sputtering in NaCl solution. (C) 2015 Elsevier B.V. All rights reserved.