Publicaciones 2011-2020

@article{RN395,
title = {Solution, Solid-State Two Step Synthesis and Optical Properties of Zno and Sno2 Nanoparticles and Their Nanocomposites with Sio2},
author = { C. Diaz and M.L. Valenzuela and M. Segovia and K. Correa and R. De La Campa and A.P. Soto},
url = {/brokenurl#<Go to ISI>://WOS:000425608200006},
doi = {10.1007/s10876-017-1324-8},
issn = {1040-7278},
year = {2018},
date = {2018-01-01},
journal = {Journal of Cluster Science},
volume = {29},
number = {2},
pages = {251-266},
abstract = {Nanostructure luminescent ZnO and SnO2 materials are prepared by a two-step solid-state method based on the solution preparation of the macromolecular precursors ZnCl2 center dot Chitosan and SnCl2 center dot Chitosan having different ratios (1:1, 1:5 and 1:10), their pyrolysis under air at 800 A degrees C. The pyrolytic ZnO and SnO2 nanomaterials show a dependence of the particle size, morphology and luminescent properties with the ratio [metal/polymer] in the MCl2 center dot Chitosan precursors. Thus, ZnO semiconductor materials exhibit luminescence spectra with several emission at 440 nm corresponds to a radiative transition of an electron from the shallow donor level of oxygen vacancies, and the zinc interstitial, to the valence band. On the other hand, the photoluminescence spectrum of the nanostructured SnO2 shows an intense blue luminescence at a wavelength of 420 nm which may be attributed to oxygen-related defects that have been introduced during the growth process of the nanoparticles. Additionally, whereas SnO2 was successfully incorporated into SiO2 structure (SnO2//SiO2) by pyrolysis of solid-state mixtures of the precursors SnCl2 center dot Chitosan in the presence of SiO2, the same reaction carried out with ZnCl2 center dot Chitosan precursors led to a mixture of Zn2SiO4 and SiO2. Thus, this new methodology yields nanostructured semiconductor materials, ZnO and SnO2, suitable for optoelectronic and sensor solid-state devices.},
keywords = {center chitin, chitosan, crystal-structure, dot fine-structure, kinetics, mechanisms, nanostructures, photoluminescence, sio2, size sno2 solid-state synthesis, zinc-oxide, zno},
pubstate = {published},
tppubtype = {article}
}

@article{RN298,
title = {Synthesis and Photocatalytic Activity of Hybrid Layered Zno(Myristic Acid)/Ag Nanoparticles},
author = { L. Diaz and S. Devis and C. Sotomayor and G. Gonz\'{a}lez and E. Benavente},
url = {/brokenurl#<Go to ISI>://WOS:000381540100003},
doi = {10.1016/j.matlet.2016.05.126},
issn = {0167-577x},
year = {2016},
date = {2016-01-01},
journal = {Materials Letters},
volume = {181},
pages = {8-11},
publisher = {2016 Elsevier B.V.},
abstract = {A new hybrid hetero nanocomposite, consisting of ZnO(myristic acid)/Ag-NPs, has been synthesized. The nanocomposite, made up of single ZnO nanosheets sandwiched between myristic acid self-assembled monolayers was synthesized and decorated with metal nanoparticles by chemical solution and tested in the photodegradation of methylene blue under UV light irradiation. The product displayed significant photocatalytic activity for degradation of the dye, and the activity was improved by a factor of three compared to bulk ZnO under similar conditions. The observed photodegradation efficiency is discussed in terms of the confinement of the semiconductor in the two dimensional structure, the adsorption ability of the organic component and the plasmonic absorption of Ag nanoparticles, which makes them act as electron wells, thus promoting charge separation and a reduced recombination rate.},
keywords = {equilibration, fermi-level irradiation, nanocomposites, nanoflakes, nanorods, nanowires, performance, photocatalysis, semiconductors, size uv, visible-light, zno},
pubstate = {published},
tppubtype = {article}
}

@article{RN79,
title = {Hybrid Laminar Organic-Inorganic Semiconducting Nanocomposites},
author = { Z. Lopez-Cabana and D. Navas and E. Benavente and M.A. Santa-Ana and V. Lavayen and G. Gonz\'{a}lez},
url = {/brokenurl#<Go to ISI>://WOS:000302299300014},
doi = {10.1080/15421406.2011.633852},
issn = {1542-1406},
year = {2012},
date = {2012-01-01},
journal = {Molecular Crystals and Liquid Crystals},
volume = {554},
pages = {119-134},
abstract = {Hybrid two-dimensional nanocomposites of transition metal semiconductors based on molybdenum disulfide, zinc oxide, and vanadium pentoxide, in which ultra-thin sheets of the inorganic component are stabilized by insertion into a bilayer of organic amphiphiles, are described. The resulting solids are commensurate species with characteristic stoichiometries, extremely high aspect ratio, and large organic-inorganic interfaces. Synthesis procedures and changes in the properties of the nanocomposites with respect to those of their components, depend on the structural nature of the pristine semiconductor. Derivatives of the laminar semiconductor MoS2 are obtained by quasi-topotactic intercalation of amphiphiles into the layered inorganic matrix, being changes in the properties mainly associated to guest-host charge transfer without altering significantly the electronic structure of the sulfide. In the case of the structurally isotropic ZnO bottom-up sol-gel synthesis procedures, it is necessary to use amphiphiles as templates, producing the two dimensional confinement with significant changes in the band gap of the semiconductor. Vanadium oxide, because of bonding asymmetry, may be easily intercalated. However due to its low laying conduction band, this leads to mixed valence species. Beyond size and dimension induced bang-gap changes, the optical properties of the products, as appreciated in their absorption and emission spectra, are in general qualitatively similar to those of pristine semiconductors.},
keywords = {nanocomposites, semiconductors, v2o5, zno},
pubstate = {published},
tppubtype = {article}
}