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Investigation of decay mechanisms and associated aspects of exotic nobelium isotopes using the Skyrme energy density formalism

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Chinese physics C 2025年第3期49卷 132-142页

作者： Shubhpreet Kaur Raj Kumar Manoj K.Sharma Department of Physics and Materials Science Thapar Institute of Engineering and TechnologyPatiala 147004India

The search for heavy elements has yielded many surprises and enhanced our knowledge of nuclear synthesis and associated dynamical *** new elements and their associated isotopes have been synthesized,information concerning elements with Z≥102,remains ***,concerning the transfermium elements,the nuclear shell structure is key to ensuring nuclear ***,the shell effects have key implications on such *** experimental and theoretical investigations have been conducted to examine the reactions induced by heavy ions and the subsequent decay mechanisms in the superheavy mass *** addition,the region of transfermium elements is of great interest because of the neutron/proton shell ***,our objective is to analyze the decay mechanisms of nuclides having Z=102 nuclei,i.e.,^(248)No*and^(250)No*.An extensive study was conducted using the dynamical cluster-decay model(DCM)based on Quantum Mechanical Fragmentation Theory(QMFT).The focus was to investigate compound nucleus(CN)and non-compound nucleus(nCN)mechanisms,including fusion-fission(ff),quasi-fission(QF),and fast fission(FF).The specific isotopes of interest are^(248)No*and^(250)No*,with attention given to the role of the center-of-mass energy(E_(c.m))and angular momentum(l).The nuclear interaction potential was derived using the Skyrme energy density formalism(SEDF)with the GSkI force *** capture cross-sections were calculated using the-summed Wong *** determination of the probability of compound nucleus formation(PCN)involved a function that is dependent upon the center-of-mass *** lifetimes of the ff and QF channels were also ***,CN and nCN decay mechanisms for two isotopes of Z=102 nobelium were analyzed over the range of center-of-mass values(E_(c.m))considering the quadrupole deformationβ_(2)and optimum orientations(θ_(opt))of the decaying *** fragmentation potential,preformation probability,neck length parameter,and

关键词： super heavy nuclei Z=102 cross-sections lifetimes

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Effect of sodium zeolite mixed metal oxide catalysts on catalytic conversion of mixed-density plastic into carbon nanotubes and hydrogen fuel

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Chinese Journal of Chemical engineering 2025年第2期78卷 196-204页

作者： Farzin Sheikh Hammad Hussain Muhammad Yasin Naz Bilal Shoukat Yasin Khan Muhammad Shoaib Department of Physics University of Agriculture Faisalabad Department of Agricultural Engineering Faculty of Agricultural Engineering & Technology University of Agriculture Faisalabad Department of Electrical Engineering College of Engineering King Saud University Center for Green Innovation University of Science and Technology Beijing

A combination of experimental and statistical analysis presents a comprehensive understanding of the microwave pyrolysis technique for catalytic deconstruction of mixed-density plastics. By optimizing the process parameters and catalyst selection, it is possible to maximize the production of valuable solid and energy products, contributing to sustainable waste management. In this work, different mixed-density plastics were pyrolyzed with different catalysts and residence times to yield liquid fuel, syngas, and structured carbon residue. The effect of inputs on the product type, yield and composition was statistically evaluated using ANOVA, which showed an F value of 4.108 and a p-value of 0.098(>1.00). FTIR and GC-MS revealed that the oil product consisted of C13+fractions in the form of alkanes, alkenes, and aromatics. The microscopic analysis of the residue confirmed the formation of carbon nanotubes along with other amorphous products. The presence of impurities in the solid product was further analyzed through XRD analysis. The pyrolytic liquid fuel revealed the presence of conjugated aromatic structure and carbonyl group in their concentration. This research demonstrated that converting mixed-density plastics using sodium zeolite, aluminum oxide, and nickel oxide catalysts yields 84% valuable products, confirming wasted plastics as a lucrative energy feedstock for producing hydrogen and high-value carbon compounds.

关键词： Hydrocarbons Hydrogen production Mixed-density plastics Pyrolysis Zeolite

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Design and construction of two biased electrodes and preliminary experiments on the Keda Torus eXperiment

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Plasma science and technology 2025年第4期27卷 42-49页

作者： Jiaren WU Tao LAN Ge ZHUANG Jie WU Wenzhe MAO Chen CHEN Xingkang WANG Peng DENG Qilong DONG Yongkang ZHOU Tianxiong WANG Pengcheng LU Zeqi BAI Yuhua HUANG Zhengwei WU Zian WEI Xiaohui WEN Hai WANG Chu ZHOU Ahdi LIU Jinlin XIE Hong LI Weixing DING Wandong LIU Department of Plasma Physics and Fusion Engineering University of Science and Technology of ChinaHefei 230026People’s Republic of China

The electromagnetic turbulence in reversed field pinch(RFP)plasmas exhibits three-dimensional *** of this turbulence is crucial for enhancing plasma confinement,necessitating control over the electric field or the current *** this end,two sets of electrodes have been designed and installed on the Keda Torus eXperiment(KTX)RFP device to manipulate the edge electric field and the edge parallel current ***,the edge radial electric field and edge parallel current profile control experiments are *** the edge radial electric field control experiments,the edge radial electric field is altered under bias,accompanied with an increase in the electron density and plasma ***,under bias,both electrostatic and magnetic fluctuations are *** the edge parallel current profile control experiments,the results indicate that bias modifies the edge parallel current profile locally,leading to a localized increase in the field reversal depth and electron ***,a reduction in magnetic fluctuations is observed within the reversed field enhanced region under bias,suggesting that the bias suppresses magnetic perturbations.

关键词： KTX biased electrode radial electric field parallel current profile(Some figures may appear in colour only in the online journal)

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Mesoscopic Simulation on Self-assembly of Diphenylalanine-based Analogue with Ethylenediamine Linker

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Chinese Journal of Polymer science 2025年第4期43卷 666-676页

作者： Xin-Yi Zhao Si-Qi Sun Ning Zhou Xiao-Jun Xu Yan Wang Ting-Ting Sun Department of Physics Zhejiang University of Science and TechnologyHangzhou310008China Institute of Bioinformatics and Medical Engineering Jiangsu University of TechnologyChangzhou213001China

Diphenylalanine and its analogs cause many concerns owing to their perfect self-assembly properties in the fields of biology,medicine,and *** research has shown that diphenylalanine-based analogs with ethylenediamine linkers(PA,P=phenylalanine,and A=analog)can self-assemble into spherical assemblies,which can serve as novel anticancer drug *** this work,to understand the assembly pathways,drug loading behavior,and formation mechanism of PA aggregates at the molecular level,we carried out dissipative particle dynamics(DPD)simulations of PA molecule *** simulation results demonstrate that PA molecules spontaneously assemble into nanospheres and can self-assemble into drug-loaded nanospheres upon addition of the cancer chemotherapeutic agent doxorubicin(DOX).We also found that the hydrophobic side chain beads of PA molecules exhibited a unique onion-like distribution inside the nanospheres,which was not observed in the *** onion-like nanospheres were verified by calculating the radial distribution function(RDF)of the DPD ***,based on the analysis of the percentages of different interaction components in the total nonbonded energies,main chain-side chain interactions between PA molecules may be important in the formation of onion-like nanospheres,and the synergistic effects of main chain-side chain,main chain-drug,side chain-drug,and main chain-solvent interactions are significant in the formation of drug-loaded *** findings provide new insights into the structure and self-assembly pathway of PA assemblies,which may be helpful for the design of efficient and effective drug delivery systems.

关键词： Diphenylalanine-based analogue Self-assembly Drug delivery

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A Practical Zinc Metal Anode Coating Strategy Utilizing Bulk h-BN and Improved Hydrogen Redox Kinetics

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Energy & Environmental Materials 2025年第2期8卷 63-71页

作者： Dong Il Kim Hee Bin Jeong Jungmoon Lim Hyeong Seop Jeong Min Kyeong Kim Sangyeon Pak Sanghyo Lee Geon-Hyoung An Sang-Soo Chee Jin Pyo Hong Seung Nam Cha John Hong Department of Physics Research Institute for Natural Science Hanyang University School of Materials Science and Engineering Kookmin University Department of Physics Sungkyunkwan University (SKKU) School of Electronic and Electrical Engineering Hongik University Materials Science and Engineering Kumoh National Institute of Technology Department of Energy Engineering Gyeongsang National University Nano Convergence Materials Center Korea Institute of Ceramic Engineering and Technology (KICET) Division of Nano-Scale Semiconductor Engineering Hanyang University

Achieving high-performance aqueous zinc-ion batteries requires addressing the challenges associated with the stability of zinc metal anodes,particularly the formation of inhomogeneous zinc dendrites during cycling and unstable surface *** study introduces a practical method for scattering untreated bulk hexagonal boron nitride（h-BN） particles onto the zinc anode *** cycling,stabilized zinc fills the interstices of scattered h-BN,resulting in a more favorable（002） ***,zinc dendrite formation is effectively suppressed,leading to improved electrochemical *** zinc with scattered h-BN in a symmetric cell configuration maintains stability 10 times longer than the bare zinc symmetric cell,lasting 500 ***,in a full cell configuration with α-MnO2cathode,increased H+ion activity can effectively alter the major redox kinetics of cycling due to the presence of scattered h-BN on the zinc *** shift in H+ion activity lowers the overall redox potential,resulting in a discharge capacity retention of 96.1% for 300 cycles at a charge/discharge rate of 0.5 *** study highlights the crucial role of surface modification,and the innovative use of bulk h-BN provides a practical and effective solution for improving the performance and stability.

关键词： aqueous zinc ion batteries H+ ion insertion hexagonal boron nitride scattering Zn metal anode

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Enhanced photocatalytic performance of K-doped NaNbO3 correlated with structural defects, optical and polar properties

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Environmental science and Pollution Research 2025年第14期32卷 9030-9049页

作者： Nain, Rajbala Dwivedi, Rakesh Kumar Department of Physics and Materials Science and Engineering Jaypee Institute of Information Technology Noida201309 India

The swift pace of industrialization in the modern world has intensified the global energy crisis while exacerbating the challenges of water pollution, posing significant threats to the environmental sustainability and human well-being. Substantial endeavors have been undertaken to protect the environment from the detrimental impacts of methylene blue in the wastewater. This study shows the photocatalytic performance of eco-friendly K-modified NaNbO3 catalysts in the degradation of methylene blue dye. Compositions with x = 0, 0.05, 0.10, 0.15, and 0.20 have been synthesized using solid-state reaction method. The XRD patterns for all the compositions demonstrate the formation of a single-phase orthorhombic structure with Pbcm space group symmetry. Analysis of the UV–Visible spectra indicates a trend of decreasing band gap from 3.21 eV for x = 0 to 3.01 eV for x = 0.20. High-resolution XPS scans show the presence of additional Nb4+ state along with Nb5+ state for doped samples. The edges of the valence and conduction bands using XPS and UV–Visible spectra, have been determined for each of the samples. The composition with x = 0.10 has shown a maximum degradation efficiency of 96% under UV radiations (300 W Xenon lamp) that aligns with the lowest photoluminescence intensity observed for this sample. An appropriate defect model with the help of band diagrams of these compositions for MB dye degradation and a suitable electron transfer mechanism have been proposed. The scavenger test has been found to validate the role of superoxide ions in the photocatalytic degradation of MB dye. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Sustainable development

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NJmat 2.0:User Instructions of Data-Driven Machine Learning Interface for Materials science

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Computers, Materials & Continua 2025年第4期83卷 1-11页

作者： Lei Zhang Hangyuan Deng Department of Internet Engineering School of Software EngineeringNanjing University of Information Science&TechnologyNanjing210044China Department of Materials Physics School of Chemistry and Materials ScienceNanjing University of Information Science&TechnologyNanjing210044China

NJmat is a user-friendly,data-driven machine learning interface designed for materials design and *** platform integrates advanced computational techniques,including natural language processing(NLP),large language models(LLM),machine learning potentials(MLP),and graph neural networks(GNN),to facili-tate materials *** platform has been applied in diverse materials research areas,including perovskite surface design,catalyst discovery,battery materials screening,structural alloy design,and molecular *** automating feature selection,predictive modeling,and result interpretation,NJmat accelerates the development of high-performance materials across energy storage,conversion,and structural ***,NJmat serves as an educational tool,allowing students and researchers to apply machine learning techniques in materials science with minimal coding *** automated feature extraction,genetic algorithms,and interpretable machine learning models,NJmat simplifies the workflow for materials informatics,bridging the gap between AI and experimental materials *** latest version(available at https://***/articles/software/NJmatML/24607893(accessed on 01 January 2025))enhances its functionality by incorporating NJmatNLP,a module leveraging language models like MatBERT and those based on Word2Vec to support materials prediction *** utilizing clustering and cosine similarity analysis with UMAP visualization,NJmat enables intuitive exploration of materials *** NJmat primarily focuses on structure-property relationships and the discovery of novel chemistries,it can also assist in optimizing processing conditions when relevant parameters are included in the training *** providing an accessible,integrated environment for machine learning-driven materials discovery,NJmat aligns with the objectives of the Materials Genome Initiative and promotes broader adoption of AI techniques in materials science.

关键词： Data-driven machine learning natural language processing machine learning potential large language model

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The effect of room temperature magnetic field on photoluminescence of Mn:CsPbBr_(3) quantum dots prepared by one-pot method in air

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Nano Research 2025年第4期18卷 561-568页

作者： Mengwei Chen Chenguang Shen Wei Huang Yingping Yang Jie Shen Department of Physics School of Physics and MechanicsWuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China

The generation and manipulation of spin-polarized electrons at room temperature are essential for the development of advanced spin-optoelectronic *** this work,a one-pot method was used to successfully synthesize homogenous Mn:CsPbBr_(3) perovskite quantum dots in air with particle sizes of 7−8 *** effects of Mn doping on the structure,optical and magnetic properties of CsPbBr_(3) quantum dots were *** findings demonstrated proper Mn doping improved the crystallinity and photoluminescence(PL)of quantum *** prepared quantum dots have a narrow full width at half maximum emission(FWHM)of about 17−20 *** magnetic properties of the doped samples and the effect of the magnetic field on the PL spectra properties were *** results show that trace Mn doping can improve the room-temperature ferromagnetism of CsPbBr_(3) quantum *** with magnetic elements makes CsPbBr_(3) quantum dots more responsive to the applied magnetic *** at a lower 50 mT magnetic field,the PL peak of Mn:CsPbBr_(3) still declined 5.91%.Mn:CsPbBr_(3) quantum dots are a new type of multifunctional material that is beneficial to spintronics *** work demonstrates a low-cost synthesis *** should make all-inorganic perovskite quantum dots a promising material for room-temperature spin optoelectronic devices.

关键词： CsPbBr_(3)quantum dots Mn doping one-pot method ferromagnetism magnetic field

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Nanoscale Electron Beam Patterning of PEDOT:PSS Free-Standing Films for Enhanced Thermoelectric Performance

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Energy & Environmental Materials 2025年第2期8卷 316-323页

作者： Hyejeong Lee Sunho Lee Sohyang Cha Gopinathan Anoop Hosun Shin Division of Chemical and Materials Metrology Korea Research Institute of Standards and Science KRISS Department of Aerospace Engineering University of Illinois at Urbana-Champaign Department of Applied Measurement Science University of Science and Technology UST Department of Physics Amrita Vishwa Vidyapeetham

The growing demand for flexible,lightweight,and highly processable electronic devices makes high-functionality conducting polymers such as poly(3,4-ethylene dioxythiophene):polystyrene sulfonate(PEDOT:PSS) an attractive alternative to conventional inorganic materials for various applications including ***,considerable improvements are necessary to make conducting polymers a commercially viable choice for thermoelectric *** study explores nanopatterning as an effective and unique strategy for enhancing polymer functionality to optimize thermoelectric parameters,such as electrical conductivity,Seebeck coefficient,and thermal *** nanopatterning into thermoelectric polymers is challenging due to intricate technical hurdles and the necessity for individually manipulating the interdependent thermoelectric ***,array nanopatterns with different pattern spacings are imposed on free-standing PEDOT:PSS films using direct electron beam irradiation,thereby achieving selective control of electrical and thermal transport in PEDOT:*** beam irradiation transformed PEDOT:PSS from a highly ordered quinoid to an amorphous benzoid *** pattern spacing resulted in a remarkable 70% reduction in thermal conductivity and a 60% increase in thermoelectric figure of merit compared to non-patterned PEDOT:*** proposed nanopatterning methodology demonstrates a skillful approach to precisely manipulate the thermoelectric parameters,thereby improving the thermoelectric performance of conducting polymers,and promising utilization in cutting-edge electronic applications.

关键词： nanotechnology polymers semiconductors thermoelectrics

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Controllable chaos in the coupled waveguide-optomechanical system with phase shifter

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science China(physics,Mechanics & Astronomy) 2025年第4期68卷 26-34页

作者： Deng-Wei Zhang Pei-Qi Qin Li-Li Zheng Zhi-Ming Zhan Xin-You Lü Department of Mathematics and Physics Luoyang Institute of Science and TechnologyLuoyang 471023China School of Computer and Information Engineering School of SoftwareLuoyang Institute of Science and TechnologyLuoyang 471023China School of Artificial Intelligence Jianghan UniversityWuhan 430056China School of Physics Huazhong University of Science and TechnologyWuhan 430074China

We theoretically investigate chaotic dynamics in an optomechanical system composed of a whispering-gallery-mode(WGM)microresonator and a *** find that tuning the optical phase using a phase shifter and modifying the coupling strength via a unidirectional waveguide(IWG)can induce chaotic *** underlying reason for this phenomenon is that adjusting the phase and coupling strength via the phase shifter and IWG bring the system close to an exceptional point(EP),where field localization dynamically enhances the optomechanical nonlinearity,leading to the generation of chaotic *** addition,due to the sensitivity of chaos to phase in the vicinity of the EP,we propose a theoretical scheme to measure the optical phase perturbations using *** work may offer an alternative approach to chaos generation with current experimental technology and provide theoretical guidance for optical signal processing and chaotic secure communication.

关键词： cavity optomechanics chaos exceptional point

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