Generation and characterization of NiO nanoparticles by continuous wave fiber laser ablation in liquid
Generation and characterization of NiO nanoparticles by continuous wave fiber laser ablation in liquid
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DOI：
10.1007/s11051-008-9530-9
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发表时间：
2009-08-01
影响因子：
2.5
通讯作者：
Watkins, K. G.
中科院分区：
文献类型：
--
作者：
Khan, Sohaib Z.;Yuan, Yudie;Watkins, K. G.
液体中脉冲激光烧蚀（PLAL）已被广泛应用于纳米颗粒（NPs）的制备。我们报告了使用高功率、高亮度连续波（CW）光纤激光源在1，070 nm波长下生成NiO NPs。通过透射电子显微镜（TEM）、配备有能量色散X射线（EDX）的高分辨率TEM和X射线衍射（XRD）对此类NP在尺寸分布、形状、化学组成和相结构方面进行表征。结果表明，在水中形成的NiO纳米颗粒的平均尺寸为12.6 nm。添加阴离子表面活性剂十二烷基硫酸钠（SDS）的NiO纳米粒子的大小下降到10.4 nm。纳米粒子的形状也受到SDS的影响，随着SDS浓度的增加，纳米粒子的形状从水中的球形为主变为四角形。此外，在水和SDS溶液中生成的NiO纳米粒子是包含立方和菱面体结构的双相。还发现，NiO NPs在性质上是单晶的，与尺寸和形状无关。
Pulsed laser ablation in liquid (PLAL) has been widely applied for the generation of nanoparticles (NPs). We report on the generation of NiO NPs using a high-power, high-brightness continuous wave (CW) fiber laser source at a wavelength of 1,070 nm. Characterization of such NPs in terms of size distribution, shape, chemical composition, and phase structure was carried out by transmission electron microscopy (TEM), high-resolution TEM equipped with energy-dispersive X-ray (EDX), and X-ray diffraction (XRD). The results revealed the formation of NiO NPs in water with an average size of 12.6 nm. The addition of anionic surfactant sodium dodecyl sulfate (SDS) reduced the size of NiO NPs down to 10.4 nm. The shape of the NPs was also affected by the SDS, showing the change of shapes from spherical domination in water to tetragonal with increased SDS concentrations. Furthermore, the NiO NPs generated in water and SDS solutions were dual phase containing both cubic and rhombohedral structures. It was also found that the NiO NPs were single crystalline in nature irrespective of the size and shape.