Publicaciones 2011-2020

@article{RN146,
title = {Solvent and Stabilizer Free Growth of Ag and Pd Nanoparticles Using Metallic Salts/Cyclotriphosphazenes Mixtures},
author = { C. Diaz and M.L. Valenzuela and S. Caceres and R. Diaz and C. O'dwyer},
url = {/brokenurl#<Go to ISI>://WOS:000327684100017},
doi = {10.1016/j.matchemphys.2013.08.034},
issn = {0254-0584},
year = {2013},
date = {2013-01-01},
journal = {Materials Chemistry and Physics},
volume = {143},
number = {1},
pages = {124-132},
publisher = {2013 Elsevier B.V.},
abstract = {Cyclotriphosphazene is used as a sacrificial solid-state template to synthesize a range of Ag and Pd nanoparticles with diverse geometries by thermal treatment using MLn/N3P3(O2C12H8)(3) mixtures. The Pd and Ag nanoparticles are synthesized by solid-state pyrolysis of AgPPh3[CF3SO3]/N3P3(O2C12H8)(3) and PdCl2/N3P3(O2C12H8)(3) mixtures with molar relationships of 1:1, 1:5 and 1:10 respectively, in air and at 800 degrees C. The morphology of the as-prepared nanoparticles is found to depend on the molar ratio of the precursor mixture, the preparation method and of the nature of the metal. Ag and Pd, microcrystals were thermally grown on Si from the respective 1:1 precursors while that metal foams were grown from 1:5 ratios precursors on SiO2 wafers. High resolution transmission electron microscopy investigations reveal in most cases small crystals of Pd. HRSTEM measurements indicate that the formation of the Pd and Ag nanoparticles occurs through a phase demixing and dewetting mechanism. This approach has potential to be a useful and facile method to prepare metallic nanoparticles without requiring solutions or surfactants for application in electronic, catalytic and sensor materials and devices.},
keywords = {annealing, derivatives, electron gold, mechanical-behavior, metals, microscopy, nanoparticles, nanorods organometallic palladium polyphosphazenes, precursors, properties, pyrolysis, shape-controlled solid-state surface synthesis, thermolytic transformation},
pubstate = {published},
tppubtype = {article}
}

@article{RN143,
title = {Bimetallic Au/Ag Metal Superstructures from Macromolecular Metal Complexes in Solid-State},
author = { C. Diaz and M.L. Valenzuela and D. Bobadilla},
url = {/brokenurl#<Go to ISI>://WOS:000331238800015},
doi = {10.4067/S0717-97072013000400019},
issn = {0717-9707},
year = {2013},
date = {2013-01-01},
journal = {Journal of the Chilean Chemical Society},
volume = {58},
number = {4},
pages = {1994-1997},
abstract = {Novel bimetallic Au/Ag superstructures have been prepared from solid-state pyrolysis of the macromolecular complexes Chitosan( MLn/M'Ln)(n) y PSP-4-PVPx(MLn/M'Ln)(n) with MLn = AuCl3 and M'Ln = Ag(CF3SO3). The characterization was made from XRD (X-ray diffraction of powder), SEM and EDS analysis. Morphologies are influenced by both the nature of the polymer and the metal/polymer, molar ratio of the polymer precursor. EDS analysis suggests a core/shell Au/Ag structure for the materials. A probable mechanism of the formation of these superstructures is discussed. Although separated reports of metallic superstructures of Au or Ag have been recently described, the here reported are the first bimetallic Au/Ag.},
keywords = {and au complexes, derivatives, fabrication, gold, macromolecular metallic morphology, nanocrystals, nanoparticles, organometallic polyphosphazenes, precursors, pyrolysis pyrolysis, superstructures, thermolytic transformation},
pubstate = {published},
tppubtype = {article}
}