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Crystallisation of a mixed-metal form of the porous framework UiO-66 in which Zr is partially replaced by Ce produces a ligand-defective material, that contains some Ce(III) as well as a majority of Ce(IV). Infrared spectroscopy shows enhanced binding of methanol in the substituted material that leads to catalytic decomposition of the alcohol, which may be due to a combination of defects and redox activity.
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http://dx.doi.org/10.1039/c5cc05072c | DOI Listing |
Nat Commun
September 2025
Animal Physiology Unit, Institute of Neurobiology, University of Tübingen, Tübingen, Germany.
Interval timing, the ability to perceive and estimate durations between events, is essential for many animal behaviors. In mammals, it is linked to specific cortical and sub-cortical brain regions, but its neural basis in birds remains unclear. We trained two male carrion crows on a time estimation task using visual stimuli, cueing them to wait for a minimum duration of 1500 ms, 3000 ms, or 6000 ms before responding to receive a reward.
View Article and Find Full Text PDFInt J Antimicrob Agents
September 2025
Dalle Molle Institute for Artificial Intelligence IDSIA. USI/SUPSI, Via la Santa 1, CH-6962 Lugano-Viganello, Switzerland. Electronic address:
Cell-penetrating peptides (CPPs) are powerful vectors for the intracellular delivery of a diverse array of therapeutic molecules. Despite their potential, the rational design of CPPs remains a challenging task that often requires extensive experimental efforts and iterations. In this study, we introduce an innovative approach for the de novo design of CPPs, leveraging the strengths of machine learning (ML) and optimization algorithms.
View Article and Find Full Text PDFJ Phys Condens Matter
September 2025
Department of Physics, Punjabi University, Department of Physics, Punjabi University, Patiala-147002, Patiala, 147002, INDIA.
In the present work, DFT investigations were carried out to study the effect of doping on the structural, mechanical, and optical properties of a quaternary High Entropy Alloy (HEA), FeCoVNi, with substitution doping of Co and Ni elements by Se. The cubic phase of FeCoVNi transforms into an orthorhombic phase when Co and Ni sites are replaced with Se. The mechanical stability is retained for substitution of Co up to 37.
View Article and Find Full Text PDFJ Phys Condens Matter
September 2025
Gunma University, 1-5-1 Tenjincho, Kiryu, 376-0052, JAPAN.
We review the fabrication and transport characterization of hexagonal boron nitride (hBN)/Bernal bilayer graphene (BLG) moiré superlattices. Due to the moiré effect, the hBN/BLG moiré superlattices exhibit an energy gap at the charge neutrality point (CNP) even in the absence of a perpendicular electric field. In BLG, the application of a perpendicular electric field tunes the energy gap at the CNP, which contrasts with single-layer graphene and is similar to the family of rhombohedral multilayer graphene.
View Article and Find Full Text PDFPhys Rev Lett
August 2025
Jilin University, State Key Laboratory of Integrated Optoelectronics, JLU Region, College of Electronic Science and Engineering, Changchun 130012, China.
Exceptional rings (ERs) are high-dimensional non-Hermitian topologies formed by exceptional points, significantly enriching the topological properties of non-Hermitian systems. Because of the intricate topology and symmetry requirements, the realization of ERs generally demands complex structures and precise parameter tuning, resulting in relatively few experimental observations in high-dimensional periodic systems. Here, we show that even the simplest 1D non-Hermitian periodic systems can support multiple ERs, enabled by the system's multiple degrees of freedom which naturally accommodate diverse non-Hermitian perturbations.
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