Laser-assisted preparation of complex colloidal nanostructures by nanosecond ablation in liquid

Rosen G. Nikov; Nikolay N. Nedyalkov; Anna Og. Dikovska; Daniela B. Karashanova

doi:10.1117/12.2516648

29 January 2019 Laser-assisted preparation of complex colloidal nanostructures by nanosecond ablation in liquid

Rosen G. Nikov, Nikolay N. Nedyalkov, Anna Og. Dikovska, Daniela B. Karashanova

Proceedings Volume 11047, 20th International Conference and School on Quantum Electronics: Laser Physics and Applications; 110470L (2019) https://doi.org/10.1117/12.2516648
Event: International Conference and School on Quantum Electronics "Laser Physics and Applications": ICSQE 2018, 2018, Nessebar, Bulgaria

Abstract

The paper presents results on nanosecond laser ablation of ZnO nanostructures immersed in a liquid. The nanostructured ZnO samples were prepared in two steps. In the first one, a thin catalyst Au layer was deposited on the glass substrate by standard on-axis pulsed laser deposition (PLD) technique. In the next step, using again the PLD method, ZnO was deposited on the Au layer and thus the nanostructured ZnO samples were produced. The as-prepared samples were then immersed in double distilled water and irradiated by nanosecond laser pulses delivered by a Nd: YAG laser system at λ = 532 nm. Two different configurations of irradiation – against the structure and through the glass substrate – were used in the ablation in liquid experiments. The influence of the laser fluence for each of the ablation configurations used on the size, shape and optical properties of the obtained colloidal nanostructures was investigated. It was established optimal processing conditions, allowing transfer of the ZnO nanostructures from the substrate into the liquid medium. The nanostructures shape and size distribution were evaluated by means of transmission electron microscopy. Selected area electron diffraction was employed for chemical phase identification of the produced nanostructures. The colloids obtained were investigated by optical transmission spectroscopy in the near UV and in the visible region.

Citation Download Citation

Rosen G. Nikov, Nikolay N. Nedyalkov, Anna Og. Dikovska, and Daniela B. Karashanova "Laser-assisted preparation of complex colloidal nanostructures by nanosecond ablation in liquid", Proc. SPIE 11047, 20th International Conference and School on Quantum Electronics: Laser Physics and Applications, 110470L (29 January 2019); https://doi.org/10.1117/12.2516648

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KEYWORDS

Zinc oxide

Nanostructures

Laser ablation

Nanostructuring

Liquids

Gold

Nanorods

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