Results 31 to 40 of about 225 (84)

Hexapod‐Shaped PbS Quantum Dots for Enhanced Light Scattering and Efficiency in Semitransparent Organic Solar Cells

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
Achieving high efficiency while maintaining visible transparency is a key challenge for semitransparent organic solar cells (ST‐OSCs) intended for building‐integrated photovoltaic (BIPV) applications. Here, we report for the first time the incorporation of hexapod‐shaped lead sulfide (PbS) colloidal quantum dots (CQDs) into the active layer of P3HT ...
Parya Paridani, Davoud Raeyani, Elmira Annabi Milani‬, Negin Mirzazadeh, Zahra Shokati Ansaroudi, Asghar Asgari, Cheng Du   +6 more
wiley   +1 more source

Principios que consideran los catedráticos al elaborar problemas matemáticos

UCV-Scientia, 2018
La presente investigación pretende describir los principios que consideran los docentes de una universidad al momento de elaborar problemas matemáticos.
Roger Ivan Soto Quiroz
doaj   +1 more source

Structural Control of Photoconductivity in a Flexible Titanium‐Organic Framework

Advanced Materials, Volume 37, Issue 52, December 29, 2025.
The concept of flexibility is extended to titanium frameworks and use it to gain control over charge transport. MUV‐35 is a flexible doubly interpenetrated framework that can shrink spontaneously its volume by ≈40% to afford a photoconductive, porous state that is thermodynamically favored by non‐covalent interactions. Abstract The soft nature of Metal‐
Clara Chinchilla‐Garzón, Marta Galbiati, Alechania Misturini, Pol Gimeno‐Fonquernie, Neyvis Almora‐Barrios, Natalia M. Padial, Carlos Martí‐Gastaldo   +6 more
wiley   +1 more source

Asociacionismo y representación de intereses médicos en Buenos Aires, 1852-1880

Asclepio: Revista de Historia de la Medicina y de la Ciencia, 1998
El presente artículo analiza el surgimiento de las primeras asociaciones médicas de Buenos Aires entre 1852 y 1880. La primera, la Asociación Médica Bonaerense, se caracterizó por su ambivalencia frente al elitismo de los catedráticos de la Facultad de ...
Ricardo González Leandri
doaj   +1 more source

Bi–Sb Co‐Alloying Tunes Photoexcited State Dynamics in (4FPEA)4AgBi1−xSbxI8 Layered Double Perovskites through Structural Confinement

Advanced Optical Materials, Volume 13, Issue 36, December 19, 2025.
Lead‐free double perovskites are emerging alternatives to lead‐halide analogues, leveraging low toxicity and highly tunable chemical compositions. These materials possess unique carrier dynamics, often governed by self‐trapped exciton (STE)‐mediated recombination.
Joshua K. G. Karlsson, Sami Toikkonen, Noolu Srinivasa Manikanta Viswanath, Alejandro Cortés‐Villena, Raquel E. Galian, Noora Lamminen, G. Krishnamurthy Grandhi, Paola Vivo   +7 more
wiley   +1 more source

Texto de la intervención del Secretario de Estado de la Seguridad Social en el acto de clausura

Estudios de Deusto, 2015
Es para mí una satisfacción encontrarme en la Universidad de Deusto y tener la oportunidad de clausurar estas Jornadas, agradeciendo esta iniciativa tanto a los responsables de la Universidad, por la organización del evento, como a los catedráticos y a ...
Gerardo Camps Dehesa
doaj   +1 more source

Atomic Scale Visualization of Vibrational Modes in Armchair Graphene Nanoribbon

physica status solidi (RRL) – Rapid Research Letters, Volume 19, Issue 12, December 2025.
To visualize the vibrational modes of armchair graphene nanoribbons and verify theories, a functionalized scanning tunneling tip is used to enhance the inelastic tunneling channel over the elastic one. Results show that edge phonons are localized than bulk phonons with little influence from substrate interactions.
Stefan Šćepanović, Diego López‐Alcalá, José J. Baldoví, Alexander Vahl, Abdou Hassanien   +4 more
wiley   +1 more source

Room Temperature Spin‐Dependent Transport in 2D Hofmann‐Type Single‐Layer Network

Small, Volume 21, Issue 50, December 17, 2025.
Room‐temperature magnetoresistance effect in a 2D magnetic Hofmann‐type network has been found using break junction scanning tunneling microscopy technique. A [Pt(CN)4Co]x system is grown on a gold substrate using 4‐mercaptopyridine ligands as anchoring ligands with a magnetic nickel tip. The reversal of the tip magnetization results in the shutdown of
Mauricio R. Aguilar, Alejandro Martín‐Rodríguez, Silvia Gómez‐Coca, Víctor Rubio‐Giménez, José Antonio Real, Ismael Díez‐Pérez, Albert C. Aragonès, Eliseo Ruiz   +7 more
wiley   +1 more source

El pasado escindido: la enseñanza de la historia en las escuelas españolas, 1875-1900

Hispania, 2001
Durante la Restauración la enseñanza de la historia de España a nivel primario y secundario reflejaba los conflictos ideológicos y políticos de la sociedad española.
Carolyn P. Boyd
doaj   +1 more source

Bloch–Landau–Zener Oscillations in Moiré Lattices

Fortschritte der Physik, Volume 73, Issue 11, November 2025.
Abstract A theory of two‐dimensional Bloch–Landau–Zener (BLZ) oscillations of wavepackets in incommensurate moiré lattices under the influence of a weak linear gradient is developed. Unlike periodic systems, aperiodic lattices lack translational symmetry and therefore do not exhibit a conventional band‐gap structure.
Sergey K. Ivanov, Yaroslav V. Kartashov, Vladimir V. Konotop   +2 more
wiley   +1 more source