Publicaciones 2011-2020

@article{RN409,
title = {Er-Doped Nanostructured Batio3 for Nir to Visible Upconversion},
author = { A. Meneses-Franco and M. Campos-Vallette and S.O. Vasquez and E.A. Soto-Bustamante},
url = {/brokenurl#<Go to ISI>://WOS:000448658400164},
doi = {10.3390/ma11101950},
issn = {1996-1944},
year = {2018},
date = {2018-01-01},
journal = {Materials},
volume = {11},
number = {10},
abstract = {Photoluminescent mechanisms in erbium-doped barium titanate nanoparticle systems were studied. Er3+ ions were introduced into the BaTiO3 lattice by the sol-gel method. The resulting Er3+ concentration was between 0% and 5%, with Ba/Ti ratios of 1.008 and 0.993. The stoichiometry of Ba and Ti concentrations in the lattice influenced the doping mechanism and placement of erbium ions in the lattice structure. Our research shows the existence of a strong correlation between Ba/Ti ratios, erbium concentration, phase structure and doping site location on the upconversion photoluminescence mechanisms. Competing upconversion emissions H-2(11/2)/(S3/2I15/2)-S-4-I-4 at 523 and 548 nm respectively and other photoluminescent mechanisms as (I9/2I11/2)-I-4-I-4 around 4000 nm (2500 cm(-1)) were studied using Raman and emission spectroscopy. The upconversion process is predominant over other photoluminescent decay when the material presents high distortion in the surrounding activator.},
keywords = {barium crystal, dielectric-properties, erbium, fabrication, ions microstructure, nanoparticle, nanoparticles, nanotechnology, particles, photoluminescent, spectra, technology, titanate, upconversion},
pubstate = {published},
tppubtype = {article}
}

@article{RN363,
title = {Effect of the Seed Layer on the Growth and Orientation of the Zno Nanowires: Consequence on Structural Optical Properties},
author = { A. Serrano and A. Arana and A. Gald\'{a}mez and A. Dutt and B.M. Monroy and F. Guell and G. Santana},
url = {/brokenurl#<Go to ISI>://WOS:000416184600065},
doi = {10.1016/j.vacuum.2017.03.010},
issn = {0042-207x},
year = {2017},
date = {2017-01-01},
journal = {Vacuum},
volume = {146},
pages = {509-516},
publisher = {2017 Elsevier Ltd.},
abstract = {High quality vertically aligned zinc oxide (ZnO) nanowires (NWs) were grown on Au-coated aluminum doped zinc oxide (AZO) thin films via vapor-liquid-solid (VLS) technique. AZO seed layers were deposited using two different techniques named as ultrasonic spray pyrolysis (USP) and magnetron sputtering. Structural, morphological and compositional properties of the NWs grown on the two distinct seed layers were analyzed in detail by using X-ray diffraction (XRD), scanning electronic microscopy (SEM) and energy dispersive spectroscopy (EDS) techniques, respectively. In the first case, (seed layer grown by USP technology), NWs showed the (101) orientation, whereas in the second case, (seed layer grown by sputtering) NWs showed (002) orientation. It was confirmed by the SEM images, that NWs with (002) orientation shown better vertical alignment than NWs with (101) orientation. In addition, optical properties were also studied using photoluminescence (PL) spectroscopy and irrespective of the preferred orientation, NWs showed a strong green emission at room temperature. The study made in the present work on the seed layer preparation by two techniques and hence, deposition conditions to achieve fully controllable ZnO nanowires with precise distance, shape, position and orientation could provide opportunities for the fabrication of future optoelectronic devices.},
keywords = {fabrication, layer, luminescence, nanostructures, networks, photoluminescence pressure properties, pyrolysis, seed spray sputtering, temperature, thin-films, ultrasonic zinc-oxide zno},
pubstate = {published},
tppubtype = {article}
}

@article{RN248,
title = {Cyclodextrin Inclusion Compound Crystals for Growth of Cu-Au Core-Shell Nanoparticles},
author = { N. Silva and E. Arellano and C. Castro and N. Yutronic and E. Lang and B. Chornik and P. Jara},
url = {/brokenurl#<Go to ISI>://WOS:000357572400020},
doi = {10.1007/s10847-015-0531-x},
issn = {1388-3127},
year = {2015},
date = {2015-01-01},
journal = {Journal of Inclusion Phenomena and Macrocyclic Chemistry},
volume = {82},
number = {3-4},
pages = {497-504},
abstract = {The preparation and structural elucidation of the 2 alpha-cyclodextrin/decylamine inclusion compound (IC) by proton nuclear magnetic resonance, rotating frame overhauser effect spectroscopy and powder X-ray diffraction have been achieved. The IC microcrystals were used as a support for the preparation of Au-Cu core-shell nanoparticles by the sputtering method. The coating of copper nanoparticles with gold was verified through anodic stripping voltammetry. The presence of metallic copper and the absence of copper oxides were determined by X-ray photoelectron spectroscopy. These results show that the formation of core-shell Cu-Au by sputtering is an effective approach to prevent the oxidation of Cu particles, leading to potential applications in nanoelectronics.},
keywords = {alpha-cyclodextrin, complexes compound, copper core-shell decylamine, fabrication, gold inclusion nanoparticles, optical-properties, oxide, particles, phase-transfer, scattering},
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}
}