Results 171 to 180 of about 5,236,261 (354)

Tuning Charge‐Separated State Lifetimes in Perovskite Nanocrystal‐Perylenediimide Hybrids

Advanced Optical Materials, EarlyView.
Functional perylenediimides with varied spacer lengths surface engineer CsPbBr₃ perovskite nanocrystals, yielding hybrid materials with new properties. Time‐resolved techniques reveal photoinduced charge separation from perovskite nanocrystals to perylenediimides, with microsecond‐lived charge carriers. Spacer length modulates charge carrier lifetimes,
Alejandro Cortés‐Villena, José Garcés‐Garcés, Alejandro Cadranel, Alberto García‐Ros, Ángela Sastre‐Santos, Fernando Fernández‐Lázaro, Julia Pérez‐Prieto, Dirk M. Guldi, Raquel E. Galian   +8 more
wiley   +1 more source

Tres Cuentos de Mercedes Durand

La Universidad, 2018
Tres Cuentos de Mercedes Durand.
La Universidad
doaj  

Ciudadanía y Universidad

Estudios sobre Educación, 1970
Este artículo analiza la relación entre política y universidad a través del significado de la ciudadanía como concepto articulador de las relaciones entre el individuo y la vida pública. El modo de entender la ciudadanía en el mundo contemporáneo puede ser considerado como herencia de la Revolución.
openaire   +3 more sources

Detection of Hybrid Optical Anapoles in Dielectric Microspheres

Advanced Optical Materials, EarlyView.
In this work, hybrid optical anapoles are detected in dielectric microspehers using dual detection optical spectroscopy. The results show that the excitation of TiO2 microspheres under tightly focused Gaussian Beam illumination leads to the appearence of scattering minima in both the forward and backward directions within specific wavelength ranges ...
Uttam Manna, Iker Gómez‐Viloria, Robert Sevik, Isaac Tribaldo, Mahua Biswas, Gabriel Molina‐Terriza, Jorge Olmos‐Trigo   +6 more
wiley   +1 more source

Poemas de Rafael Góchez Sosa

La Universidad, 2018
Poemas de Rafael Góchez ...
La Universidad
doaj  

Surface Oxidation of 2D γ‐Indium Sulfide Nanoplatelets and Its Impact on Photoluminescence

Advanced Photonics Research, EarlyView.
Photoluminescence of defective 2D γ‐In2S3 can be modulated after exposure to air or oxygen‐containing ligands. Cryogenic photoluminescence measurements reveal that a new acceptor level is introduced upon oxidation, modulating the relative intensity of the emission bands.
Leyre Aldaz‐Caballero, Nan Liu, Pablo Molina, Antonio Arranz, Eva Hemmer, Antonio Benayas, Riccardo Marin   +6 more
wiley   +1 more source

El Círculo de Lecturas de la Universidad de Concepción

, 1924
Revista Atenea
openalex   +2 more sources

Proving Optical Anisotropy and Polarization Effects in β‐Ga2O3$\left(\text{Ga}\right)_{2} \left(\text{O}\right)_{3}$ Nanomembranes via X‐Ray Excited Optical Luminescence

Advanced Photonics Research, EarlyView.
In this study, the pronounced anisotropy in the optical properties of β‐Ga2O3 nanomembranes has been analized under a synchrotron nanoprobe. We have investigated the site‐specific contributions of distint Ga ions to the emission bands by combining polarization‐dependent X‐ray absorption near‐edge structure and X‐ray excited luminescence.
Paula Pérez‐Peinado, Jaime Dolado, Pedro L. Alcázar Ruano, Daniel Carrasco, Ruth Martínez‐Casado, Valentina Bonino, Gema Martínez‐Criado, Jani Jesenovec, John S. McCloy, Francisco Domínguez‐Adame, Jorge Quereda, Emilio Nogales, Bianchi Méndez   +12 more
wiley   +1 more source

Synthesis of Spirolactones from Carbonyls via Carboborylation of N‐Sulfonylhydrazones with Alkoxycarbonylalkylboronic Acids

Advanced Synthesis &Catalysis, EarlyView.
Spirolactones are readily prepared from carbonyls via their N‐tosylhydrazones. The reaction involves carboborylation with ethoxycarbonyl‐substituted boronic acids, followed by oxidation and lactonization. Thermal or photochemical protocols enable versatility.
Lucía López, Sara Filgueira, María‐Paz Cabal, Carlos Valdés   +3 more
wiley   +1 more source

Water‐Mediated 1,7‐Palladium Aryl‐to‐Aryl Migration in an Unusual Aryne Trimerization Enables the Synthesis of Multihelicenes with Profoundly Hindered Stereogenic Axes

Advanced Synthesis &Catalysis, EarlyView.
In the presence of a Pd0 catalyst, large π‐extended arynes trimerize in an unusual manner to forge extremely compact and strained chiral benzenoids. This new trimerization reaction involves a 1,7‐Pd isomerization, a rare and poorly understood process that is elucidated.
Albert Artigas, Manuel A. Ortuño, Jesús Castro‐Esteban, Michel Giorgi, Diego Peña, Dolores Pérez, Yoann Coquerel   +6 more
wiley   +1 more source