Laser ablation method: use of surfactants to form the dispersed Ag nanoparticles
Laser ablation method: use of surfactants to form the dispersed Ag nanoparticles
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DOI：
10.1016/s0927-7757(01)00854-8
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发表时间：
2002-02-04
影响因子：
5.2
通讯作者：
Yeh, CS
中科院分区：
文献类型：
--
作者：
Chen, YH;Yeh, CS
采用激光烧蚀法制备了银纳米粒子。在表面活性剂SDS和CTAB的辅助下，获得了高度分散的Ag粒子。使用120 mJ/脉冲的激光强度，在SDS中产生4.2 +/-1.9 nm的粒径，在CTAB中产生7.8 +/-4.5 nm的粒径。阴离子SDS和阳离子CTAB对Ag胶体的保护能力不同：SDS能使Ag胶体稳定一个月以上，而CTAB保护的Ag胶体在一周内完全沉淀。对这些稳定性观察结果给出了合理的解释。此外，发现烧蚀激光功率的变化实现颗粒尺寸控制。60 mJ/脉冲的较小激光强度在SIDS和CTAB中分别产生6.8 +/- 2.7 nm和9.4 +/- 5.9 nm的较大颗粒尺寸。(C)2002 Elsevier Science B. V.保留所有权利。
The laser ablation method was employed to synthesize Ag nanoparticles. With the aid of the surfactants, SDS and CTAB, highly dispersed Ag particles were attained. Using a laser intensity of 120 mJ/pulse particle diameters of 4.2 +/- 1.9 nm were produced in SDS and 7.8 +/- 4.5 nm in CTAB. The anionic SDS and cationic CTAB exhibited differential ability in protecting Ag colloids: the particles containing SDS remained stable at least one month, while the CTAB-protected Ag precipitated completely within one week. Plausible explanations were given to such stability observations. Moreover, the changes in the ablation laser powers were found to achieve particle size control. Lesser laser intensity of 60 mJ/pulse produced larger particle sizes of 6.8 +/- 2.7 nm and 9.4 +/- 5.9 nm in SIDS and CTAB, respectively. (C) 2002 Elsevier Science B.V. All rights reserved.