Results 251 to 260 of about 931,327 (325)

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Bioorthogonal Photoactivation of 2‐Nitrobenzyl Caged Doxorubicin Anticancer Prodrugs on Gold Nanostars

Advanced Materials, EarlyView.
Bioorthogonal chemistry was applied to intracellularly photoactivate Doxorubicin (Dox) using gold nanostars (AuNSt) and near‐infrared (NIR) light. Two prodrugs were used: one photoactivatable, masked with 2‐nitrobenzyl carbamate (proDox1) and another photolabile, masked with 2‐nitrobenzyl diol (proDox2), which was attached to the AuNSt surface.
Juan José Esteve‐Moreno, Andrea Escudero, Oscar Ferreira Silvestre, José Manuel Terrés, Mónica Gorbe, Eva Garrido, Carlos Renero‐Lecuna, Judith Langer, María Alfonso, Javier Ibañez, Félix Sancenón, Roberto Cao‐Milán, Luis M. Liz‐Marzán, Alba García‐Fernández, Andy Hernández‐Montoto, Ramón Martínez‐Máñez   +15 more
wiley   +1 more source

Water Permeates and Plasticizes Amorphous Carbon Dots: Unraveling the Inner Accessibility of the Nanoparticles by Glass Transition Studies

Advanced Materials, EarlyView.
The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti, Valerio Di Lisio, Lucia Cardo, Alessandro Camilli, Estela Moretón Alfonsín, Daniele Cangialosi, Amaia Iturrospe Ibarra, Arantxa Arbe, Maurizio Prato   +8 more
wiley   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Full Quantum Analysis of Two-Photon Absorption Using Two-Photon Wave Function: Comparison of Two-Photon Absorption with One-Photon Absorption

Full Quantum Analysis of Two-Photon Absorption Using Two-Photon Wave Function: Comparison of Two-Photon Absorption with One-Photon Absorption
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Two-Photon Absorption in Anthracene

Two-Photon Absorption in Anthracene
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Theory of Two-Photon Absorption

Theory of Two-Photon Absorption
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Experimental study of the validity of entangled two-photon absorption measurements in organic compounds

Conference on Lasers and Electro-Optics, 2022
We present a study of entangled two-photon absorption (ETPA) in Rhodamine B and Zinc Tetraphenylporphirin, using different experimental schemes. Our results suggest that while photon-absorption takes place, it is not due to ETPA.
Samuel Corona-Aquino, Omar Calderón-Losada, Mayte Y. Li-Gomez, H. Cruz-Ramírez, V. Álvarez-Venicio, M. Carreón-Castro, Roberto de J. León-Montiel, A. U’Ren   +7 more
semanticscholar   +1 more source

Upconversion Photovoltaic Effect of WS2/2D Perovskite Heterostructures by Two-Photon Absorption.

ACS Nano, 2021
Photovoltaic devices work by converting sunlight energy into electric energy. The efficiency of current photovoltaic devices, however, is significantly limited by the transmission loss of photons with energies below the bandgap of channel semiconductors,
Qixing Wang, A. Wee
semanticscholar   +1 more source

Retardation in two-photon absorption

Physical Review A, 1989
Previous calculations of two-photon absorption and emission in hydrogen have revealed frequencies at which the transition is forbidden, at least within the approximations made. Here we show that if retardation is taken into account these so-called ''transparency frequencies'' are slightly shifted, but the zero transition amplitude persists.
, Yang, , Chan, , Lieber
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