Publicaciones 2011-2020

@article{RN360,
title = {Solid-State Synthesis of Pure and Doped Lanthanide Oxide Nanomaterials by Using Polymer Templates. Study of Their Luminescent Properties},
author = { C. Diaz and M.L. Valenzuela and C. Garcia and R. De La Campa and A.P. Soto},
url = {/brokenurl#<Go to ISI>://WOS:000413124300029},
doi = {10.1016/j.matlet.2017.07.112},
issn = {0167-577x},
year = {2017},
date = {2017-01-01},
journal = {Materials Letters},
volume = {209},
pages = {111-114},
publisher = {2017 Elsevier B.V.},
abstract = {We herein reports the solid-state synthesis of pure and doped lanthanide oxides by using polymeric materials (chitosan and polystyrene-co-poly(4-vinylpyridine), PS-co-P4VP) as a solid template. Lanthanide nanomaterials are prepared in two-step methodology combining both solution and solid procedures. The first involves the synthesis of macromolecular complexes Chitosan.[M(NO3)(3)//M'(NO3)(3)] and PS-co-P4VP.[M(NO3)(3)//M'(NO3)(3)] (M = La, Pr; M' = Eu); and the second consists in the pyrolysis at 800 degrees C of the as-prepared solid macromolecular complexes. The pyrolytic products were characterized by X-ray diffraction, SEM-EDS, TEM, and HR-TEM. Whereas similar particle size distribution in average (ca. 25 nm) was observed with both polymer templates, a higher degree of crystallinity was obtained by using PS-co-P4VP. Importantly, the emission luminescent intensity of the doped pyrolytic oxides, La2O3//Eu2O3 and PrO1,83//Eu2O3, is not quenched despite the presence of dopant. Thus, the as-prepared doped oxides exhibit an enhanced Eu3+ emission originated from the D-5(0) -> F-7(n) (n = 1, 2, 3, 4) transitions, which is more intense for the PS-co-P4VP template. This synthetic methodology base on the pyrolysis of polymeric complexes can be considered as a general and straightforward methodology leading to pure and Eu3+-doped nanostructured lanthanide oxide.},
keywords = {chitosan, europium-doped, facile lanthanide nanocrystals, oxide, polymer-templated, scale supracrystals, synthesis, y2o3-eu},
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{RN201,
title = {Novel Solid-State Route to Nanostructured Tin, Zinc and Cerium Oxides as Potential Materials for Sensors},
author = { C. Diaz and S. Platoni and A. Molina and M.L. Valenzuela and H. Geaney and C. O'dwyer},
url = {/brokenurl#<Go to ISI>://WOS:000335873900035},
doi = {10.1166/jnn.2014.9350},
issn = {1533-4880},
year = {2014},
date = {2014-01-01},
journal = {Journal of Nanoscience and Nanotechnology},
volume = {14},
number = {9},
pages = {6748-6753},
abstract = {Solid-state sensor nanostructured materials (SnO2, ZnO and CeO2) have been prepared by pyrolysis of macromolecular complexes: PSP-co-4-PVP center dot (SnCl2)(n), PSP-co-4-PVP center dot (ZnCl2)(n) and PSP-co-4-PVP center dot (Ce(NO3)(3))(n) in several molar ratios under air at 800 degrees C. The as-prepared nanostructured SnO2 exhibits morphologies and particle sizes which are dependent upon the molar ratio of the SnCl2:PSP-co-4-PVR When a larger weight fraction of the inorganic salt in the precursor mixture is used (1:10 > 1:5 > 1.1) larger crystalline crystals are found for each oxide. For ZnO and CeO2 agglomerates of morphologies from the respective hexagonal and cubic structures were observed with typical sizes of 30-50 nm in both cases for a precursor mixture ratio of 1:1.},
keywords = {ceo2, cerium complex, gold metal-oxide, nanoparticles, nanostructures, oxide, polyphosphazenes, ruthenium, sensors, solid state, synthesis, tem, tin zinc},
pubstate = {published},
tppubtype = {article}
}