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Title: Ultrafast laser induced periodic sub-wavelength aluminum surface structures and nanoparticles in air and liquids

Abstract

In this communication, we demonstrate the generation of laser-induced periodic sub-wavelength surface structures (LIPSS) or ripples on a bulk aluminum (Al) and Al nanoparticles (NPs) by femtosecond (fs) laser direct writing technique. Laser irradiation was performed on Al surface at normal incidence in air and by immersing in ethanol (C₂H₅OH) and water (H₂O) using linearly polarized Ti:sapphire fs laser pulses of ~110 fs pulse duration and ~800 nm wavelength. Field emission scanning electron microscope is utilized for imaging surface morphology of laser written structures and it reveals that the spatial periodicity as well as the surface morphology of the LIPSS depends on the surrounding dielectric medium and also on the various laser irradiation parameters. The observed LIPSS have been classified as low spatial frequency LIPSS which are perpendicularly oriented to the laser polarization with a periodicity from 460 to 620 nm and high spatial frequency LIPSS which spectacles a periodicity less than 100 nm with the orientation parallel to the polarization of the incident laser beam. Fabricated colloidal solutions, which contain the Al NPs, were characterized by UV-Vis absorption spectroscopy and transmission electron microscopy (TEM). TEM results reveal the formation of internal cavities in Al NPs both in ethanol andmore » water. Formation mechanism of LIPSS and cavities inside the nanoparticles are discussed in detail.« less

Authors:
; ;  [1]
  1. Department of Physics and Center for Research in Photonics, University of Ottawa, 150 Louis Pasteur, Ottawa K1N6N5, Ontario (Canada)
Publication Date:
OSTI Identifier:
22305985
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 116; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION SPECTROSCOPY; AIR; ALUMINIUM; BEAMS; DIELECTRIC MATERIALS; FIELD EMISSION; LASER RADIATION; LIQUIDS; NANOPARTICLES; ORIENTATION; PERIODICITY; POLARIZATION; SAPPHIRE; SCANNING ELECTRON MICROSCOPY; SURFACES; TRANSMISSION ELECTRON MICROSCOPY; WATER; WAVELENGTHS

Citation Formats

Kuladeep, Rajamudili, Dar, Mudasir H., Rao, D. Narayana, E-mail: dnrsp@uohyd.ac.in, E-mail: dnr-laserlab@yahoo.com, and Deepak, K. L. N. Ultrafast laser induced periodic sub-wavelength aluminum surface structures and nanoparticles in air and liquids. United States: N. p., 2014. Web. doi:10.1063/1.4896190.
Kuladeep, Rajamudili, Dar, Mudasir H., Rao, D. Narayana, E-mail: dnrsp@uohyd.ac.in, E-mail: dnr-laserlab@yahoo.com, & Deepak, K. L. N. Ultrafast laser induced periodic sub-wavelength aluminum surface structures and nanoparticles in air and liquids. United States. https://doi.org/10.1063/1.4896190
Kuladeep, Rajamudili, Dar, Mudasir H., Rao, D. Narayana, E-mail: dnrsp@uohyd.ac.in, E-mail: dnr-laserlab@yahoo.com, and Deepak, K. L. N. 2014. "Ultrafast laser induced periodic sub-wavelength aluminum surface structures and nanoparticles in air and liquids". United States. https://doi.org/10.1063/1.4896190.
@article{osti_22305985,
title = {Ultrafast laser induced periodic sub-wavelength aluminum surface structures and nanoparticles in air and liquids},
author = {Kuladeep, Rajamudili and Dar, Mudasir H. and Rao, D. Narayana, E-mail: dnrsp@uohyd.ac.in, E-mail: dnr-laserlab@yahoo.com and Deepak, K. L. N.},
abstractNote = {In this communication, we demonstrate the generation of laser-induced periodic sub-wavelength surface structures (LIPSS) or ripples on a bulk aluminum (Al) and Al nanoparticles (NPs) by femtosecond (fs) laser direct writing technique. Laser irradiation was performed on Al surface at normal incidence in air and by immersing in ethanol (C₂H₅OH) and water (H₂O) using linearly polarized Ti:sapphire fs laser pulses of ~110 fs pulse duration and ~800 nm wavelength. Field emission scanning electron microscope is utilized for imaging surface morphology of laser written structures and it reveals that the spatial periodicity as well as the surface morphology of the LIPSS depends on the surrounding dielectric medium and also on the various laser irradiation parameters. The observed LIPSS have been classified as low spatial frequency LIPSS which are perpendicularly oriented to the laser polarization with a periodicity from 460 to 620 nm and high spatial frequency LIPSS which spectacles a periodicity less than 100 nm with the orientation parallel to the polarization of the incident laser beam. Fabricated colloidal solutions, which contain the Al NPs, were characterized by UV-Vis absorption spectroscopy and transmission electron microscopy (TEM). TEM results reveal the formation of internal cavities in Al NPs both in ethanol and water. Formation mechanism of LIPSS and cavities inside the nanoparticles are discussed in detail.},
doi = {10.1063/1.4896190},
url = {https://www.osti.gov/biblio/22305985}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 11,
volume = 116,
place = {United States},
year = {Sun Sep 21 00:00:00 EDT 2014},
month = {Sun Sep 21 00:00:00 EDT 2014}
}