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Open AccessArticle

Preferential Growth of ZnO Micro- and Nanostructure Assemblies on Fs-Laser-Induced Periodic Structures

1
Materials Physics Department, Faculty of Physics, Complutense University of Madrid, 28040 Madrid, Spain
2
Laser Processing Group, Instituto de Óptica (IO-CSIC), Consejo Superior de Investigaciones Científicas, Serrano 121, 28006 Madrid, Spain
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 731; https://doi.org/10.3390/nano10040731
Received: 16 March 2020 / Revised: 6 April 2020 / Accepted: 9 April 2020 / Published: 11 April 2020
In this work, we demonstrate the use of laser-induced periodic surface structures (LIPSS) as templates for the selective growth of ordered micro- and nanostructures of ZnO. Different types of LIPSS were first produced in Si-(100) substrates including ablative low-frequency spatial (LSF) LIPSS, amorphous-crystalline (a–c) LIPSS, and black silicon structures. These laser-structured substrates were subsequently used for depositing ZnO using the vapor–solid (VS) method in order to analyze the formation of organized ZnO structures. We used scanning electron microscopy and micro-Raman spectroscopy to assess the morphological and structural characteristics of the ZnO micro/nano-assemblies obtained and to identify the characteristics of the laser-structured substrates inducing the preferential deposition of ZnO. The formation of aligned assemblies of micro- and nanocrystals of ZnO was successfully achieved on LSF-LIPSS and a–c LIPSS. These results point toward a feasible route for generating well aligned assemblies of semiconductor micro- and nanostructures of good quality by the VS method on substrates, where the effect of lattice mismatch is reduced by laser-induced local disorder and likely by a small increase of surface roughness. View Full-Text
Keywords: ZnO; fs-laser writing; LIPSS; Raman spectroscopy ZnO; fs-laser writing; LIPSS; Raman spectroscopy
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MDPI and ACS Style

Sotillo, B.; Ariza, R.; Siegel, J.; Solis, J.; Fernández, P. Preferential Growth of ZnO Micro- and Nanostructure Assemblies on Fs-Laser-Induced Periodic Structures. Nanomaterials 2020, 10, 731.

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