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On the infodynamics of ramifications in constructal design.
Biosystems
January 2025
University of Coimbra, ADAI, LAETA, Polo II, Rua Luis Reis Santos, Coimbra, 3030-788, Portugal. Electronic address:
Infodynamics is the study of how information behaves and changes within a system during its development. This study investigates the insights that informational analysis can provide regarding the ramifications predicted by constructal design. First, infodynamic neologisms informature, defined as a measure of the amount of information in indeterminate physical systems, and infotropy-contextualized informature representing the degree of transformation of indeterminate physical systems-are introduced.
View Article and Find Full Text PDFEnhancement of Sm Luminescence in Sol-Gel Silica Matrix: Effect of Ligands Phenyl Phosphinic Acid and Trioctylphosphine Oxide.
J Fluoresc
December 2024
Department of Physics, Dibrugarh University, Dibrugarh, 786004, Assam, India.
Sol-gel silica matrices singly doped with Sm and co-doped with ligands phenyl phosphinic acid (PPIA) and trioctylphosphine oxide (TOPO) were fabricated and studied for their structural and spectroscopic behaviour. Structural studies were done by x-ray diffraction (XRD) and Fourier transform infra-red (FTIR) absorption analysis whereas spectroscopic behaviour was studied by ultraviolet - visible (UV-Vis) absorption, photoluminescence (PL) excitation, emission and time-correlated decay analyses. XRD studies exhibit the amorphous nature of the samples and FTIR studies corroborate the presence of the ligands in the silica matrix.
View Article and Find Full Text PDFElucidating light-induced changes in excitation energy transfer of photosystem I and II in whole cells of two model cyanobacteria.
Photosynth Res
February 2025
Department of Biology, Washington University, St. Louis, MO, 63130, USA.
Excitation energy transfer between the photochemically active protein complexes is key for photosynthetic processes. Phototrophic organisms like cyanobacteria experience subtle changes in irradiance under natural conditions. Such changes need adjustments to the excitation energy transfer between the photosystems for sustainable growth.
View Article and Find Full Text PDFEvidence of Preferential Aluminum Site Loss during Reaction-Induced Dealumination.
J Am Chem Soc
December 2024
Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland.
Understanding the mechanism of steam-induced dealumination of zeolite catalysts is of high relevance for tuning their performance and stability in multiple industrial processes. A combination of Al and H-H double-quantum single-quantum magic angle spinning nuclear magnetic resonance and diffuse-reflectance ultraviolet-visible spectroscopies identified a preferential dealumination of tetrahedral aluminum sites in H-ZSM-5 zeolites. Framework aluminum atoms facing channels display reactivity toward steam higher than that of those in their intersections.
View Article and Find Full Text PDFElement-specific X-Ray detection of electron paramagnetic resonance in thin films of quantum bits.
Nat Commun
November 2024
PSI Center for Photon Sciences CPS, Villigen PSI, Switzerland.
Article Synopsis
- Element-specific magnetism studied via synchrotron X-ray spectroscopy helps analyze spin and orbital moments of transition metals and lanthanides in thin films and monolayers.
- The research introduces a method using X-ray detection of microwave-driven electron paramagnetic resonance to explore quantum-coherent states, which is more sensitive than traditional X-ray methods.
- Findings from the study of phthalocyanine-based metal complexes suggest new phenomena related to charge trapping, enabling potential detection of coherent superposition states in atomic and molecular spins on various surfaces.
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