Download Laser Ablation Synthesis of Colloidal Dispersions of Nickel

Laser Ablation Synthesis of Colloidal Dispersions of Nickel Nanoparticles
Niusha Lasemia, Oscar Bomati-Miguela,b, Ulrich Pachera, Ruth Lahozc,
Jacqueline Friedmannd, Dietmar Pumd, Christian Rentenbergere, Herwig Peterlike,
Wolfgang Kauteka
a
b
University of Vienna, Department of Physical Chemistry, Vienna, Austria
Autonomous University of Madrid, Department of Applied Physics, Madrid, Spain
c
Instituto de Ciencia de Materiales de Aragón. CSIC-UNIZAR. Zaragoza, Spain
d
University of Natural Resources and Life Sciences (BOKU)
Department of Nanobiotechnology, Vienna, Austria
e
University of Vienna, Faculty of Physics, Vienna, Austria
Colloidal dispersions of nickel nanoparticles are applied as catalysts for important
industrial reactions.1 The catalytic activity of these nanoparticles depend on their colloidal stability, particle size distribution, and surface chemistry.
Laser ablation in liquids can generate colloidal dispersions of metal nanoparticles2, such
as gold3 or iron4. Therefore, we have attempted to synthesize directly colloidal stable Ni
nanoparticles via laser ablation of Ni bulk plates immersed in a liquid by using different
pulsed laser systems working at different operational conditions (wavelength, laser fluence, frequency repetition rate, pulse duration and pulse overlap). The properties of the
so-obtained nanoparticles were characterized by various characterization techniques.
Ablation in water as solvent yielded Ni nanoparticles inside a massive aggregate of Ni
hydroxide. When alcohols were used, core-shell nanoparticles were obtained. Also, we
found that the particle production rate, as well as the crystallinity, size and dispersity of
these nanoparticles depend on the laser parameters. Thus, we have demonstrated the
ability of the laser ablation in liquids to synthesize colloidal dispersions of Ni nanoparticles without the use of surfactants to control the particle size and dispersity.
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H. Zeng, XW Du, S. Singh et al. Adv. Funct. Mater. 2012, 22, 1333.
[3]
V Amendola, M Meneghetti. J. Mater Chem. 2007, 17: 4705
[4])
V Amendola, P Riello, and M. Meneghetti. J. Phys Chem C. 2011, 115: 5140