Influence of the laser pulse repetition rate and scanning speed on the morphology of Ag nanostructures fabricated by pulsed laser ablation of solid target in water 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Applied physics, A. Materials science & processing
年/卷/期
2017 / 123 / 11
ISSN号
0947-8396
作者单位
Bulgarian Acad Sci, Inst Elect, 72 Tsarigradsko Chaussee, BU-1784 Sofia, Bulgaria;Bulgarian Acad Sci, Inst Elect, 72 Tsarigradsko Chaussee, BU-1784 Sofia, Bulgaria;Bulgarian Acad Sci, Inst Elect, 72 Tsarigradsko Chaussee, BU-1784 Sofia, Bulgaria;Bulgarian Acad Sci, Inst Solid State Phys, 72 Tsarigradsko Chaussee, Sofia 1784, Bulgaria;Bulgarian Acad Sci, Inst Opt Mat & Technol, Acad G Bonchev St,Bl 109, BU-1113 Sofia, Bulgaria;Bulgarian Acad Sci, Inst Gen & Inorgan Chem, Acad G Bonchev St,Bl 11, BU-1113 Sofia, Bulgaria;
作者
Nikolov, A. S.;Balchev, I. I.;Nedyalkov, N. N.;Kostadinov, I. K.;Karashanova, D. B.;Atanasova, G. B.;
摘要
Nanostructures of noble metal were produced by pulsed laser ablation in liquid. A solid Ag target was immersed in double distilled water and a CuBr laser in a master oscillator-power amplifier configuration oscillating at 511 nm and emitting pulses with duration of 30 ns at a repetition rate of up to 20 kHz was employed to produce different colloids. The impact was studied of the laser pulse repetition rate and the beam scanning speed on the morphology of the nanostructures formed. Further, the optical extinction spectra of the colloids in the UV/VIS range were measured and used to make an indirect assessment of the changes in the shape and size distribution of the nanostructures. The transmission values in the near UV range were used to estimate the efficiency of the ablation process under the different experimental conditions implemented. A visualization of the nanostructures was made possible by transmission electron microscopy (TEM). The structure and phase composition of the nanoparticles were studied by high-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED), while the alteration of the target surface caused by the impact of the high-repetition-rate laser illumination was investigated by X-ray photoelectron spectroscopy (XPS). The optimal conditions were determined yielding the highest efficiency in terms of amount of ablated material.
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