Publicaciones 2011-2020

@article{RN399,
title = {Vibrational and Optical Properties of Czts Derivatives for Photovoltaic Applications: Synthesis of Cu2znsn1-Xgexs2se2 Compounds},
author = { C. Pinto and F. Lopez and A. Gald\'{a}mez and P. Barahona and S. Moris},
url = {/brokenurl#<Go to ISI>://WOS:000448954400011},
doi = {10.1016/j.solidstatesciences.2018.09.005},
issn = {1293-2558},
year = {2018},
date = {2018-01-01},
journal = {Solid State Sciences},
volume = {85},
pages = {76-82},
abstract = {Herein, we report the vibrational and optical properties of new Cu2ZnSn1-xGexS2Se2 solid solutions prepared by isomorphic substitution of a fraction of Se by S in Cu2ZnSn1-xGexSe4 (CZTGeSe) through ceramic method. The Raman spectra and x-ray diffraction analysis on samples confirms that they crystallize in Kesterite-type structure. The Raman peaks were analyzed by fitting of the spectra allowing identification the vibrational modes by comparison with experimental and theoretical data from CZTGeSe and CZTGeS end-members. The dependency between the amount of cation and chalcogen substituent in optical characterization shows band gap around of 1.36 eV, close to the optimum value for solar cells with high efficiency.},
keywords = {analysis, band-gap, cu2znsns4, czts, method, nanocrystals, nanoparticles, raman raman-scattering scattering, single-crystals, solar-cells, spectroscopy spray-pyrolysis},
pubstate = {published},
tppubtype = {article}
}

@article{RN397,
title = {Solid-State Synthesis of Lnocl/Ln(2)O(3) (Ln = Eu, Nd) by Using Chitosan and Ps-Co-P4vp as Polymeric Supports},
author = { C. Diaz and D. Carrillo and R. De La Campa and A.P. Soto and M.L. Valenzuela},
url = {/brokenurl#<Go to ISI>://WOS:000451031200013},
doi = {10.1016/j.jre.2018.03.031},
issn = {1002-0721},
year = {2018},
date = {2018-01-01},
journal = {Journal of Rare Earths},
volume = {36},
number = {12},
pages = {1326-1332},
publisher = {2018 Chinese Society of Rare Earths. Published by Elsevier B.V.},
abstract = {A series of lanthanide materials of type LnOCl or Ln(2)O(3) (Ln = Eu, Nd) were successfully prepared via a convenient and straightforward two-step procedure. Firstly, and by using chitosan and PS-co-P4VP as polymeric supports, macromolecular complexes of type chitosan LnCl(3) and PS-co-P4VP center dot LnCl(3) were prepared. These macromolecular complexes were treated in solid state at 800 degrees C under air, leading to the corresponding LnOCl or Ln(2)O(3) materials (Ln = Eu, Nd) with moderate to good yields. The nature of the as-prepared lanthanide materials (LnCl and/or Ln(2)O(3)) is strongly influenced by the polymeric template (i.e., chitosan or PS-co-P4VP), the lanthanide salt precursor, and the polymer/lanthanide molar ratio. Thus, when chitosan center dot LnCl(3) and PS-co-P4VP center dot EuCl3 are used as macromolecular precursors, a mixture of crystalline phases o f both EuOCl and Eu2O3 are obtained. However, when chitosan center dot NdCl3 and PS-co-P4VP center dot NdCl3 are used, a sole pure crystalline phase of NdOCl is obtained. The nanostructured lanthanide materials were characterized by means of XRD (X-ray diffraction of powder), SEM, EDS, TEM, and HRTEM. The luminescent spectra of the as-prepared EuOCl/Eu2O3 mixture materials show an emission pattern whose intensity is strongly influenced by the nature of the polymeric precursor, as well as on the metal/polymer molar ratios.},
keywords = {earths, euocl/eu2o3, lanthanide, lanthanides, luminescence, method, nanocrystals, ndocl, oxides, rare scale solventless supracrystals},
pubstate = {published},
tppubtype = {article}
}

@article{RN361,
title = {Bimetallic Au//Ag Alloys inside Sio2 Using a Solid-State Method},
author = { C. Diaz and M.L. Valenzuela and D. Bobadilla and M.A. Laguna-Bercero},
url = {/brokenurl#<Go to ISI>://WOS:000410837600032},
doi = {10.1007/s10876-017-1261-6},
issn = {1040-7278},
year = {2017},
date = {2017-01-01},
journal = {Journal of Cluster Science},
volume = {28},
number = {5},
pages = {2809-2815},
abstract = {Bimetallic Au/Ag nanostructures have been included inside SiO2 by pyrolysis of the macromolecular complexes Chitosan center dot(MLn/M'Ln)(n)center dot SiO2 and PSP-4-PVP center dot(MLn/M'Ln)(n)center dot SiO2 with MLn = AuCl3 and M'Ln = Ag(CF3SO3). The structural characterization was performed by XRD (X-ray diffraction of powder) and UV-Vis, and the microstructural characterization was done by SEM/EDS analysis HRTEM. The resulting products from the pyrolytic precursors PSP-4-PVP center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:1 (1), PSP-4-PVP center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:5 (2), Chitosan center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:1 (3) and Chitosan center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:5 (4) were Au/Ag//SiO2, Au//SiO2 and Ag//SiO2 as well as isolated Au and Ag, depending on the polymeric precursor. The Chitosan polymer precursor induces mainly Ag and Ag/SiO2 nanostructures, while PSP-4-PVP induces mainly Au/Ag//SiO2 nanostructures. This can be explained by the facility to link Ag+ to the NH2 and OH groups of Chitosan than to the pyridine of PSP-4-PVP. On the contrary, Au3+ exhibits most coordination ability to pyridine groups of PSP-4-PVP than NH2- and OH-groups of Chitosan. EDS mapping analysis indicates a uniform distribution of the Au/Ag nanostructure inside the SiO2 matrix. Using reflectance diffuse analysis, the plasmon is consistent with the Au/Ag alloys structure.},
keywords = {au/ag fabrication inside method, nanocrystals, nanoparticles, nanostructures, sio2, state supracrystals},
pubstate = {published},
tppubtype = {article}
}

@article{RN362,
title = {Synthesis and Magnetic Properties of Nanostructured Metallic Co, Mn and Ni Oxide Materials Obtained from Solid-State Metal-Macromolecular Complex Precursors},
author = { C. Diaz and M.L. Valenzuela and M.A. Laguna-Bercero and A. Orera and D. Bobadilla and S. Abarca and O. Pena},
url = {/brokenurl#<Go to ISI>://WOS:000402166600064},
doi = {10.1039/c7ra00782e},
issn = {2046-2069},
year = {2017},
date = {2017-01-01},
journal = {Rsc Advances},
volume = {7},
number = {44},
pages = {27729-27736},
abstract = {The simple reaction of chitosan with metallic salts yields (chitosan) (MLn)(x)},
keywords = {chemistry, chitosan, co3o4 crystal-structure, decomposition, gold nanocomposites, nanocrystals, nanoparticles, size, supracrystals},
pubstate = {published},
tppubtype = {article}
}

@article{RN144,
title = {Solution and Surfactant-Free Growth of Supported High Index Facet Sers Active Nanoparticles of Rhenium by Phase Demixing},
author = { C. Diaz and M.L. Valenzuela and S. Caceres and C. O'dwyer},
url = {/brokenurl#<Go to ISI>://WOS:000314640100008},
doi = {10.1039/c2ta00262k},
issn = {2050-7488},
year = {2013},
date = {2013-01-01},
journal = {Journal of Materials Chemistry A},
volume = {1},
number = {5},
pages = {1566-1572},
abstract = {Stable, high-index facet Re nanoparticles have been grown by a solid state synthetic method, negating the need for solutions or surfactants to control seeding, supracrystallization and NP shape. By using mixtures of K[ReO4] and the cyclic triphosphazene [NP(O2C12H8)](3), high-index facet nanoparticles and nanocrystals similar to 3 nm in size can be seeded and grown from drop-cast films and powders due to phase demixing of the metallopolymer. NP dispersions are formed directly within a carbon support that liquefies, allowing NP coarsening and ripening, and the eventual formation of a solidified graphitic support filled with crystals. Successful growth of mesoscale supracrystals of Re also occurs from ripening of nucleated NP seeds, incubated within a solidified and partially dewetted solid support that patterns the surface. The supported Re NP dispersions also exhibit surface enhanced Raman scattering within a graphitic matrix.},
keywords = {excitation gold graphene, morphology, nanocatalysts, nanocrystals, nanoparticles, precursors},
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}
}