Stoichiometry of alloy nanoparticles from laser ablation of PtIr in acetone and their electrophoretic deposition on PtIr electrodes. Jakobi, J., Menéndez-Manj́on, A., Chakravadhanula, Kiran, V. S., Kienle, L., Wagener, P., & Barcikowski, S. Nanotechnology, 22(14):145601, February, 2011. Paper doi abstract bibtex Charged Pt-Ir alloy nanoparticles are generated through femtosecond laser ablation of a Pt(9)Ir target in acetone without using chemical precursors or stabilizing agents. Preservation of the target's stoichiometry in the colloidal nanoparticles is confirmed by transmission electron microscopy (TEM)-energy-dispersive x-ray spectroscopy (EDX), high angle annular dark field (HAADF) scanning transmission electron microscopy (STEM)-EDX elemental maps, high resolution TEM and selected area electron diffraction (SAED) measurements. Results are discussed with reference to thermophysical properties and the phase diagram. The nanoparticles show a lognormal size distribution with a mean Feret particle size of 26 nm. The zeta potential of - 45 mV indicates high stability of the colloid with a hydrodynamic diameter of 63 nm. The charge of the particles enables electrophoretic deposition of nanoparticles, creating nanoscale roughness on three-dimensional PtIr neural electrodes within a minute. In contrast to coating with Pt or Ir oxides, this method allows modification of the surface roughness without changing the chemical composition of PtIr.
@article{ Jakobi2011,
abstract = {Charged Pt-Ir alloy nanoparticles are generated through femtosecond laser ablation of a Pt(9)Ir target in acetone without using chemical precursors or stabilizing agents. Preservation of the target's stoichiometry in the colloidal nanoparticles is confirmed by transmission electron microscopy (TEM)-energy-dispersive x-ray spectroscopy (EDX), high angle annular dark field (HAADF) scanning transmission electron microscopy (STEM)-EDX elemental maps, high resolution TEM and selected area electron diffraction (SAED) measurements. Results are discussed with reference to thermophysical properties and the phase diagram. The nanoparticles show a lognormal size distribution with a mean Feret particle size of 26 nm. The zeta potential of - 45 mV indicates high stability of the colloid with a hydrodynamic diameter of 63 nm. The charge of the particles enables electrophoretic deposition of nanoparticles, creating nanoscale roughness on three-dimensional PtIr neural electrodes within a minute. In contrast to coating with Pt or Ir oxides, this method allows modification of the surface roughness without changing the chemical composition of PtIr.},
author = {Jakobi, Jurij and Menéndez-Manj́{o}n, Ana and Chakravadhanula, Venkata Sai Kiran and Kienle, Lorenz and Wagener, Phillip and Barcikowski, Stephan},
doi = {10.1088/0957-4484/22/14/145601},
file = {:Users/cvskiran/Documents/mendeley_data/Jakobi et al._2011_Nanotechnology.pdf:pdf},
issn = {1361-6528},
journal = {Nanotechnology},
month = {February},
number = {14},
pages = {145601},
pmid = {21346297},
title = {{Stoichiometry of alloy nanoparticles from laser ablation of PtIr in acetone and their electrophoretic deposition on PtIr electrodes.}},
url = {http://www.ncbi.nlm.nih.gov/pubmed/21346297},
volume = {22},
year = {2011}
}
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