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Enhanced carrier mobility in strain-engineered PdAs monolayer boosted by suppressing interband scattering.
Phys Chem Chem Phys
January 2025
Institute of Applied Physics and Computational Mathematics, Beijing 100088, People's Republic of China.
Strain engineering is an effective method to modulate the electronic properties of two-dimensional materials. In this study, we theoretically studied the carrier mobility of the PdAs monolayer under different biaxial tensile strains based on the state-of-the-art electron-phonon coupling theory. We observe that the carrier mobility is largely enhanced for both n-type and p-type PdAs monolayers.
View Article and Find Full Text PDFEffects of Alzheimer's disease plasma marker levels on multilayer centrality in healthy individuals.
Alzheimers Res Ther
January 2025
Center for Cognitive and Computational Neuroscience, Complutense University of Madrid, Pozuelo de Alarcón, 28223, Spain.
Background: Changes in amyloid beta (Aβ) and phosphorylated tau brain levels are known to affect brain network organization but very little is known about how plasma markers can relate to these measures. We aimed to address the relationship between centrality network changes and two plasma pathology markers: phosphorylated tau at threonine 231 (p-tau231), a proxy for early Aβ change, and neurofilament light chain (Nfl), a marker of axonal degeneration.
Methods: One hundred and four cognitively unimpaired individuals were divided into a high pathology load (33 individuals; HP) group and a low pathology (71 individuals; LP) one.
Light-dependent electron transfer mechanism on a Z-scheme MIL-100(Fe)/AgCl/Ag heterostructure for photocatalytic degradation.
J Colloid Interface Sci
February 2025
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China. Electronic address:
Article Synopsis
- The study investigates how different light sources affect the material properties and photocatalytic mechanisms, focusing on a new composite catalyst, MIL-100(Fe)/AgCl/Ag, for breaking down organic pollutants.
- Techniques like UV-visible spectroscopy and surface-enhanced Raman spectroscopy (SERS) were used to observe the degradation process in real-time, revealing that the catalyst works significantly better under visible light than under UV light.
- The enhanced efficiency under visible light (about 2.5 times higher) is linked to improved electron and hole separation via a mechanism called surface plasmon resonance (SPR), providing insights for developing better light-responsive catalysts in the future.
Comparison of a Quantum Cascade Laser and an Interband Cascade Laser for the Detection of Stable Carbon Dioxide Isotopes Using Tunable Laser Absorption Spectroscopy.
Appl Spectrosc
November 2024
Department of Microsystems Engineering (IMTEK), University of Freiburg, Germany.
Quantum cascade lasers (QCLs) and interband cascade lasers (ICLs) are widely used as light sources in tunable laser absorption spectroscopy because they emit in the mid-infrared region where many strong and characteristic absorption bands are present. In this paper, we compare the performance of these lasers emitting at about 2310.1 cm to determine an optimal light source for detecting isotopic ratios of carbon dioxide (CO).
View Article and Find Full Text PDFArticle Synopsis
- Researchers developed an interband cascade laser (ICL) array that uses multimode interference (MMI) couplers to synchronize multiple laser emitters for better heat management and performance in the mid-infrared range (3-4 µm).
- The design includes a wide ridge structure for improved light propagation and ensures coherent operation, as confirmed by distinct far-field patterns with interference fringes.
- Experimental results show the array can achieve high output power (up to 390 mW) with excellent beam quality, indicating its potential for scalable high-power applications.
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