Annealing is the process of gradually lowering the temperature of a system to guide it towards its lowest energy states. In an accompanying paper [Y. Luo et al., Phys. Rev. E 108, L052105 (2023)10.1103/PhysRevE.108.L052105], we derived a general bound on annealing performance by connecting annealing with stochastic thermodynamics tools, including a speed limit on state transformation from entropy production. We here describe the derivation of the general bound in detail. In addition, we analyze the case of simulated annealing with Glauber dynamics in depth. We show how to bound the two case-specific quantities appearing in the bound, namely the activity, a measure of the number of microstate jumps, and the change in relative entropy between the state and the instantaneous thermal state, which is due to temperature variation. We exemplify the arguments by numerical simulations on the Sherrington-Kirkpatrick (SK) model of spin glasses.
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http://dx.doi.org/10.1103/PhysRevE.108.054119 | DOI Listing |
Food Res Int
December 2024
Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia. Electronic address:
In this study, an electroluminescent (ECL) aptasensor that could efficiently and sensitively detect acetamiprid (ACE) in vegetables was constructed based on an exonuclease-assisted target cycling amplification strategy. Bimetallic RuZn-based metal-organic framework (RuZn-MOF), nucleic acid exonuclease VII (Exo VII) and tetrahedral DNA nanostructure (TDN) were used as constituent materials. First, RuZn-MOF was a substrate material with good luminescence performance and was synthesized by a hydrothermal method.
View Article and Find Full Text PDFSmall
November 2024
II. Physikalisches Institut, Universität zu Köln, Zülpicher Straße 77, D-50937, Köln, Germany.
Starting from a single layer of NbS grown on graphene by molecular beam epitaxy, the single unit cell thick 2D materials NbS-2D and NbS-2D are created using two different pathways. Either annealing under sulfur-deficient conditions at progressively higher temperatures or deposition of increasing amounts of Nb at elevated temperature result in phase-pure NbS-2D followed by NbS-2D. The materials are characterized by scanning tunneling microscopy, scanning tunneling spectroscopy, and X-ray photoemission spectroscopy.
View Article and Find Full Text PDFAdv Sci (Weinh)
November 2024
Dipartimento di Chimica and Centre for Colloid and Surface Science, Università degli Studi di Bari Aldo Moro, Bari, 20125, Italy.
The electric dipoles of proteins in a biolayer determine their dielectric properties through the polarization density P. Hence, its reproducibility is crucial for applications, particularly in bioelectronics. Biolayers encompassing capturing antibodies covalently bound at a biosensing interface are generally preferred for their assumed higher stability.
View Article and Find Full Text PDFNanomaterials (Basel)
October 2024
Department of Mathematics, Faculty of Science and Information Technology, Jadara University, Irbid P.O. Box 733, Jordan.
We study a two-dimensional system of interacting electrons confined in equidistant planar circular rings. The electrons are considered spinless and each of them is localized in one ring. While confined to such ring orbits, each electron interacts with the remaining ones by means of a standard Coulomb interaction potential.
View Article and Find Full Text PDFJ Am Chem Soc
September 2024
Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720, United States.
Alkane dehydrogenation is an enabling route to make alkenes useful as chemical intermediates. This study demonstrates the high reactivity of Lewis acid-base (LAB) site pairs at ZrO powders for dehydrogenation of C-C alkanes and the essential requirement for chemical treatments to remove strongly bound HO and CO titrants to avoid the high temperatures required for their desorption and the concomitant loss of active sites through sintering and annealing of ZrO crystallites. The energies and free energies of bound intermediates and transition states from density functional theory (DFT), taken together with kinetic analysis and isotopic methods, demonstrated the kinetic relevance and heterolytic character of the first C-H activation at terminal C-atoms for all alkanes with a modest activation barrier (84 kJ mol) at essentially bare Zr-O LAB site pairs.
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