Results 111 to 120 of about 2,720,872 (300)

Ligand‐Dependent Locally Excited and Charge‐Transfer Emission in Linear Copper(I) Mesoionic Carbene Luminophores

open access: yesAdvanced Optical Materials, EarlyView.
Ligand engineering enables precise control of emission in linear Cu(I) complexes by tuning donor–acceptor interactions between electron‐rich amines and π‐accepting mesoionic carbenes. Naphthyl‐substituted carbenes promote locally excited phosphorescence with vibronic structure, whereas electron‐rich amides combined with electron‐poor carbenes favor ...
Felix León   +7 more
wiley   +1 more source

An Examination of the Cs2NaInCl6 Luminescence: Interplay of Self‐Generated In+ and Doped Sb3+, Er3+/Yb3+ Ions

open access: yesAdvanced Optical Materials, EarlyView.
A new luminescence mechanism in Cs2NaInCl₆ is revealed through spontaneously formed In3+→In+ centers and Er3+/Yb3+/Sb3+ doping. Tunable visible, near‐infrared, downconversion, and upconversion emissions are demonstrated, while DFT calculations explain the electronic structure.
Inna A. Ivashchenko   +10 more
wiley   +1 more source

Marginalia. The Literary Independence of Spanish America

open access: yesIdeas y Valores, 2010
This article discusses some of the characteristic problems and issues of the so-called “literary independence” of Spanish America in the light of its political emancipation from Spain. This topic goes beyond the temporal framework or the periodization of
Juan Guillermo Gómez García
doaj  

Bev Chapman's Miss Wheelchair America van

open access: yes, 1977
A photograph of the Miss Wheelchair America van with "Bev Chapman Miss Wheel Chair 1977" written on the ...
Miss Wheelchair America Pageant.
core  

Hybridization of Gap Plasmons and Grating‐Coupled Surface Plasmon Polaritons in Metal Nanoparticle Cluster Arrays on a Mirror

open access: yesAdvanced Optical Materials, EarlyView.
Here we use a template‐assisted self‐assembly approach of metal colloids onto metal films to produce hybrid plasmonic metasurfaces that integrate nanoparticle‐on‐mirror cavities with periodic metal colloid arrays. The resulting coupling between gap plasmons and grating‐coupled surface plasmon polaritons enables programmable hybrid modes with tailored ...
Afroditi Koutsogianni   +6 more
wiley   +1 more source

Sobre Murdo J. MacLeod, Spanish Central America

open access: yesHistoria Mexicana El Colegio de México, 1977
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Jesús Monjarás-Ruiz
doaj  

1975 Miss Wheelchair America Pageant awards stage

open access: yes, 1974
This photograph shows the empty auditorium and awards stage for the 1974-75 Miss Wheelchair America ...
Miss Wheelchair America Pageant.
core  

Aberrations‐Corrected Ratiometric Parameters and PLQYs for Upconversion Thermometry in Hexagonal NaYF4:Yb3+,Er3+ and NaYF4:Yb3+,Tm3+ in Micro and Nanoscale Phosphors Using Novel Integrating Sphere Setup

open access: yesAdvanced Optical Materials, EarlyView.
Each optical system introduces aberrations in the reading of photoluminescence, which makes the signal dependant on the lab equipment. Here, a calibrated system is used to obtain the PLQYs and ratiometric parameters of popular upconverters to be used in thermometry.
Adilet Zhakeyev   +5 more
wiley   +1 more source

Perspectives of The Development of Spanish

open access: yesRussian journal of linguistics: Vestnik RUDN, 2014
Spanish as Castellano spoken in Spain or Spanish spoken in Latin America... What can we say about this language? Do we really mean the language and its variety or do we speak about different languages? Are there perspectives of the development of Spanish
N F Mikheeva
doaj  

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