In situ ultraviolet–visible absorbance measurement during and after solution plasma sputtering for preparation of colloidal gold nanoparticles
In situ ultraviolet–visible absorbance measurement during and after solution plasma sputtering for preparation of colloidal gold nanoparticles
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DOI：
10.7567/jjap.53.11ra03
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发表时间：
2014-09
影响因子：
1.5
通讯作者：
Tsuyoshi Mizutani;T. Murai;H. Nameki;Tomoko Yoshida;S. Yagi
中科院分区：
文献类型：
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作者：
Tsuyoshi Mizutani;T. Murai;H. Nameki;Tomoko Yoshida;S. Yagi
通过原位紫外可见 (UV-vis) 光谱测量溶液等离子体溅射制备金纳米颗粒期间和之后 HCl、NaCl 和 NaOH 溶液的吸收光谱，以确定颗粒直径和行为。在溶液等离子体溅射中，金颗粒直接由等离子体相形成，而不是通过从电极溶解的 Au3+ 离子的还原而形成。初始直径和行为根据所使用的解决方案而有所不同。在HCl溶液中，形成金纳米颗粒并溶解成Au3+离子。当溶液饱和时，金纳米粒子通过Au3+离子的聚集而生长。在 NaCl 溶液中形成簇大小的颗粒，构成纳米颗粒，在数天内非常稳定。直径 3 nm 的金纳米颗粒在 NaOH 溶液中形成，并在几天内聚集。提出了氯离子对金纳米颗粒日序稳定性的贡献。
The absorption spectra of the HCl, NaCl, and NaOH solutions during and after the solution plasma sputtering for the preparation of gold nanoparticles are measured by in situ ultraviolet–visible (UV–vis) spectroscopy to determine the particle diameter and behavior. In the solution plasma sputtering, gold particles are directly formed from the plasma phase and not by the reduction of Au3+ ions dissolved from electrodes. The initial diameter and behavior differ according to the solution used. In HCl solution, gold nanoparticles are formed and dissolve into Au3+ ions. When the solution is saturated, the gold nanoparticles grow by the aggregation of Au3+ ions. Cluster-sized particles are formed in NaCl solution that constitute nanoparticles, which are very stable for several days. Gold nanoparticles of 3 nm diameter are formed in NaOH solution, which aggregate over several days. The contribution of chlorine ions to the day-order stability of gold nanoparticles is suggested.