Publicaciones 2011-2020

@article{RN392,
title = {Photothermally Controlled Methotrexate Release System Using Beta-Cyclodextrin and Gold Nanoparticles},
author = { N. Silva and A. Riveros and N. Yutronic and E. Lang and B. Chornik and S. Guerrero and J. Samitier and P. Jara and M.J. Kogan},
url = {/brokenurl#<Go to ISI>://WOS:000455323100023},
doi = {10.3390/nano8120985},
issn = {2079-4991},
year = {2018},
date = {2018-01-01},
journal = {Nanomaterials},
volume = {8},
number = {12},
abstract = {The inclusion compound (IC) of cyclodextrin (CD) containing the antitumor drug Methotrexate (MTX) as a guest molecule was obtained to increase the solubility of MTX and decrease its inherent toxic effects in nonspecific cells. The IC was conjugated with gold nanoparticles (AuNPs), obtained by a chemical method, creating a ternary intelligent delivery system for MTX molecules, based on the plasmonic properties of the AuNPs. Irradiation of the ternary system, with a laser wavelength tunable with the corresponding surface plasmon of AuNPs, causes local energy dissipation, producing the controlled release of the guest from CD cavities. Finally, cell viability was evaluated using MTS assays for beta-CD/MTX and AuNPs + beta-CD/MTX samples, with and without irradiation, against HeLa tumor cells. The irradiated sample of the ternary system AuNPs + beta-CD/MTX produced a diminution in cell viability attributed to the photothermal release of MTX.},
keywords = {binding, citrate complex, compound, cyclodextrin, delivery delivery, gold hepatotoxicity, inclusion irradiation, laser, methotrexate, nanoparticles, oxidative photothermal release, stabilization, stress, system, therapy},
pubstate = {published},
tppubtype = {article}
}

@article{RN398,
title = {Electrical and Optical Properties of P-Type Ag(0.3)Cu(0.7)Inq(2) Chalcopyrite Semiconductors},
author = { S. Moris and V. Manriquez and P. Barahona and A. Gald\'{a}mez and P. Valencia-Galvez},
url = {/brokenurl#<Go to ISI>://WOS:000452412600004},
issn = {1584-8663},
year = {2018},
date = {2018-01-01},
journal = {Chalcogenide Letters},
volume = {15},
number = {12},
pages = {615-623},
abstract = {We report the synthesis, characterization and electrical properties of Ag0.3Cu0.7InS2, Ag0.3Cu0.7InSe2 and Ag0.3Cu0.7InTe2. These solid solutions were synthesized via microwave-assisted solid-state reactions. Powder X-ray diffraction patterns were indexed in the space group I (4) over bar 2d. The chemical compositions were determined by scanning electron microcopy. The analysis of the vibrational properties was performed by Raman scattering measurements. The Raman peaks were analyzed by fitting the spectra and allowed the identification of the vibrational modes via comparison with experimental and theoretical data from CuInQ(2) ( Q = S, Se, Te) end-members. Ag0.3Cu0.7InS2 and Ag0.3Cu0.7InTe2 exhibit typical semiconductor p-type behavior with a carrier concentration of similar to +10(16) cm(-3). The electrical conductivities sigma at R.T. were similar to 10(-1) S cm(-1) and similar to 1.0 S cm(-1) for Ag0.3Cu0.7InS2 and Ag0.3Cu0.7InTe2, respectively. The optical band gaps, based on the UV-Vis-NIR spectra, were E-g similar to 1.50 eV.},
keywords = {chalcopyrite-type, compound, cugase2 cuinse2, cuinte2, i-iii-vi2, p-type, selenization, semiconductor solar-cells, sulfurization, ternary, thin-films},
pubstate = {published},
tppubtype = {article}
}

@article{RN300,
title = {In Situ Visualization of the Local Photothermal Effect Produced on Alpha-Cyclodextrin Inclusion Compound Associated with Gold Nanoparticles},
author = { N. Silva and C. Munoz and J. Diaz-Marcos and J. Samitier and N. Yutronic and M.J. Kogan and P. Jara},
url = {/brokenurl#<Go to ISI>://WOS:000373961200001},
doi = {10.1186/s11671-016-1322-z},
issn = {1556-276x},
year = {2016},
date = {2016-01-01},
journal = {Nanoscale Research Letters},
volume = {11},
pages = {1-8},
abstract = {Evidence of guest migration in alpha-cyclodextrin-octylamine (alpha-CD-OA) inclusion compound (IC) generated via plasmonic heating of gold nanoparticles (AuNPs) has been studied. In this report, we demonstrate local effects generated by laser-mediated irradiation of a sample of AuNPs covered with inclusion compounds on surface-derivatized glass under liquid conditions by atomic force microscopy (AFM). Functionalized AuNPs on the glass and covered by the ICs were monitored by recording images by AFM during 5 h of irradiation, and images showed that after irradiation, a drastic decrease in the height of the AuNPs occurred. The absorption spectrum of the irradiated sample showed a hypsochromic shift from 542 to 536 nm, evidence suggesting that much of the population of nanoparticles lost all of the parts of the overlay of ICs due to the plasmonic heat generated by the irradiation. Mass spectrometry matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) performed on a sample containing a collection of drops obtained from the surface of the functionalized glass provided evidence that the irradiation lead to disintegration of the ICs and therefore exit of the octylamine molecule (the guest) from the cyclodextrin cavity (the matrix).},
keywords = {compound, cyclodextrin gold guest heating, inclusion metal migration, monolayers, nanoparticles, nanorods, nanotechnology, optical-properties, plasmonic therapy},
pubstate = {published},
tppubtype = {article}
}

@article{RN221,
title = {Ozone, Nitrogen Oxides, and Volatile Organic Compounds in a Central Zone of Chile},
author = { R. Toro and R.J. Seguel and R.G.E. Morales and M.A. Leiva},
url = {/brokenurl#<Go to ISI>://WOS:000362881100003},
doi = {10.1007/s11869-014-0306-3},
issn = {1873-9318},
year = {2015},
date = {2015-01-01},
journal = {Air Quality Atmosphere and Health},
volume = {8},
number = {6},
pages = {545-557},
abstract = {The relationships between ozone (O-3) and its precursors, nitrogen oxides (NO (x) ) and volatile organic compounds (VOCs), were investigated in the VIR region (34A degrees 10' S, 71A degrees 36' W), referred to as Libertador General Bernardo O'Higgins of Chile. Observations were obtained from a field study performed at four monitoring sites, which represented different environmental conditions, i.e., rural-coastal (Marchihue, MA), urban (Rancagua, RA, and Rengo, RE), and semi-urban (Codegua, CO) during the summer (between Feb 1 and Mar 12, 2010). Overall, greater O-3 concentrations were identified at the urban sites compared with the semi-urban and rural sites. In addition, the O-3 precursor concentrations were high in the early morning hours as a consequence of fresh vehicular emissions (from 11 to 40 ppbv for NO (x) and from 15 to 36 ppbC for VOC). The total VOC/NO (x) ratios at the study sites indicated that the formation of O-3 was limited by VOCs. Most O-3 was formed from ethene, isoprene, propene, 2-methylpropene, m- and p-xylenes, and toluene. These VOCs accounted for more than 50 % of the O-3 formation. The m- and p-xylene/ethylbenzene ratio confirmed the reception of aged air masses at the CO site. In contrast, at the RA site, the impact of pollution was primarily local. Control measures should be implemented to prevent O-3 exceedances of the National Ambient Air Quality Standard (NAAQS), despite the fact that the current O-3 concentrations do not exceed the current 8-h standard of 61 ppbv. These measures should include the control of VOC emissions and their chemical reactivity.},
keywords = {air central chile, compound, environmental chemistry, izmir, organic ozone ozone, precursors, santiago, surface voc, volatile zone},
pubstate = {published},
tppubtype = {article}
}