MQ Photonics Research Centre, Macquarie University, NSW, Sydney 2109, Australia.
Langmuir. 2010 Mar 2;26(5):3156-9. doi: 10.1021/la903088e.
Femtosecond laser ablation of gold in an aqueous solution of cetyl trimethylammonium bromide (CTAB) is shown to produce nanoparticle suspensions with superior colloidal stability compared to other surfactants, with shelf lives exceeding 2 months even at low concentrations of CTAB, below 1 mM. CTAB also helps control nanoparticle size with mean diameters of 6.3, 5.6, and 4.7 nm obtained in 0.1, 0.5, and 1 mM concentrations of CTAB respectively, compared to 11.9 nm obtained in pure deionized water under same ablation conditions. The size distributions produced with low concentrations of CTAB are comparable to those produced by other surfactants, typically used at high concentrations.
飞秒激光烧蚀十六烷基三甲基溴化铵（CTAB）水溶液中产生的金纳米颗粒悬浮液具有比其他表面活性剂更优异的胶体稳定性，即使在 CTAB 浓度低至 1mM 以下时，其保质期也超过 2 个月。CTAB 还有助于控制纳米颗粒的尺寸，在 CTAB 浓度分别为 0.1、0.5 和 1mM 时，得到的平均直径分别为 6.3、5.6 和 4.7nm，而在相同的烧蚀条件下，在纯去离子水中得到的平均直径为 11.9nm。用低浓度 CTAB 产生的尺寸分布与通常在高浓度下使用的其他表面活性剂产生的尺寸分布相当。
