Chinese Journal of Physics最新文献

{"title":"Influence of plasma-chemical processes on the parameters of an atmospheric pressure Helium microdischarge","authors":"Mohamed M. Mandour ,&nbsp;Zijia Chu ,&nbsp;Anatoly A. Kudryavtsev ,&nbsp;Jingfeng Yao ,&nbsp;Chengxun Yuan","doi":"10.1016/j.cjph.2024.11.027","DOIUrl":"10.1016/j.cjph.2024.11.027","url":null,"abstract":"<div><div>This study investigates the influence of plasma-chemical processes on the parameters of an atmospheric pressure (AP) Helium microdischarge. Using a one-dimensional fluid model with both Maxwellian and non-Maxwellian electron energy distribution function (EEDF), we analyze the spatial profile of plasma parameters in a microdischarge with a <span><math><mrow><mn>0.2</mn><mi>m</mi><mi>m</mi></mrow></math></span> gap. There are significant differences in the recorded rate coefficients for dissociative recombination (DR) and three-body recombination (TR), which are essential for determining the densities of excited atoms and molecules in the high-pressure plasma, where the balance of charged particles is determined by volume recombination. A careful examination of the relevant literature reveals these contradictions. In order to adequately represent the main channels of creation and destruction of excited and charged particles, it is necessary to take into account the atomic states of Helium up to the quantum level <span><math><mrow><mi>n</mi><mo>=</mo><mn>4</mn></mrow></math></span>. The full set of plasma-chemical reactions includes elastic electron collisions, excitation and de-excitation by electrons and atoms, direct and stepwise ionization, associative ionization, molecular excimer creation and destruction, ion conversion, recombination, and radiation. The results reveal that the selected rate coefficients and EEDF form significantly influence the simulation outcomes. This highlights the need to develop improved theoretical models to enhance the control and use of plasma technologies.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 103-126"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamical analysis and hardware verification of a spatial multi-scroll chaotic system without equilibria","authors":"Lingshuang Zhang,&nbsp;Zhijun Li","doi":"10.1016/j.cjph.2024.12.012","DOIUrl":"10.1016/j.cjph.2024.12.012","url":null,"abstract":"<div><div>With the wide application of multi-scroll chaotic systems, a growing emphasis on the development of such systems has been spurred in recent years. Here, a spatial hyperchaotic multi-scroll hidden system is established by introducing three multi-stable memristors into a simple chaotic system. Despite the absence of an equilibrium point in the proposed system, the introduction of three multi-stable memristors expands an original single-scroll attractor into a three-dimensional space, resulting in the emergence of a spatial multi-scroll hidden attractor (SMSHA). The formation mechanism of SMSHA is comprehensively discussed, revealing that each scroll in SMSHA originates from the virtual equilibrium points generated by the stable equilibrium points of the incorporated memristors. Furthermore, the number of scrolls is intricately linked to that of stable equilibrium points of the memristors. More significantly, numerical analyses using various nonlinear analysis tools reveal that the proposed system has complex dynamics, including homogeneous and heterogeneous multi-stability, and partial amplitude control. Finally, the hardware system based on microcontroller is implemented to validate the numerical findings.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 368-380"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"UV response of IGZO tunnel-contact SGTs for low-power and high-sensitivity UV sensor applications","authors":"Junhyun Kim ,&nbsp;Hyunsoo Kim ,&nbsp;Jaewon Kim ,&nbsp;Hongseok Oh","doi":"10.1016/j.cjph.2024.12.004","DOIUrl":"10.1016/j.cjph.2024.12.004","url":null,"abstract":"<div><div>We present the fabrication of IGZO tunnel-contact source-gated transistors (SGTs) and a detailed investigation of their ultraviolet (UV) sensing characteristics. In the present study, we use indium gallium zinc oxide (IGZO), a material commonly used in oxide thin-film transistors (TFTs), to fabricate SGTs. We then demonstrate their applicability as UV sensors. As a novel class of TFTs, SGTs exhibit a substantially lower saturation voltage and lower power consumption than conventional ohmic-contact TFTs, which is achieved through the intentional introduction of tunneling layers to create an energy barrier. In addition, these SGTs demonstrate higher responsivity and detectivity than similarly scaled TFTs lacking energy barriers. The enhanced responsivity and detectivity highlight their applicability as high performing UV sensor. To explore this potential, we evaluated the efficacy of sunscreen cream in blocking UV light by analyzing the current–voltage (<em>I</em>–<em>V</em>) characteristics of the SGT devices underneath the sunscreen; the proposed devices should be useful in the healthcare and cosmetics industries.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 340-347"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AI-led study of dynamic changes in milk containing hybrid nanoparticles in an electromagnetically vibrated channel subjected to thermal oscillations and rapid pressure changes: Implications for dairy industry","authors":"Sanatan Das ,&nbsp;Poly Karmakar ,&nbsp;Sayan Das ,&nbsp;Saeed Dinarvand","doi":"10.1016/j.cjph.2024.11.025","DOIUrl":"10.1016/j.cjph.2024.11.025","url":null,"abstract":"<div><div>Oscillating electromagnetic forces generated from a vibrated Riga plate have broad implications across various scientific and engineering domains. Artificial intelligence (AI) is applied to optimize precision and energy efficiency in pasteurization and sterilization by regulating the thermal and dynamic behavior of nanoparticle-infused milk under electromagnetic heating. The technique ensures accurate temperature control, minimizes the risk of overheating, and preserves the milk's nutritional and sensory qualities. It focuses on predicting the thermal and dynamic behaviors of milk infused with silver and zinc oxide nanoparticles in an electromagnetically vibrated channel experiencing thermal oscillations and rapid pressure changes. The research integrates complex physical phenomena such as radiant heat emission and Darcy drag forces, employing Darcy's model to delve into drag within porous media. Detailed mathematical and physical descriptions of milk flow dynamics are established, with solutions efficiently derived using the Laplace Transform (LT) method. The results, encompassing shear stress (SS) and rate of heat transfer (RHT) analyses, are detailed in tables and graphs. Findings indicate enhanced milk momentum with higher modified Hartmann number and reduced momentum with wider electrode spacing. Elevated oscillation frequencies of the left channel wall stabilize milk flow in both hybrid nano-milk (HNM) and nano-milk (NM). Larger Casson parameter improves SS, while higher radiation parameter reduces RHT. An AI-driven artificial neural network (ANN) is employed for precise estimations, achieving 98.022% accuracy in SS testing, 98.99% in cross-validation, and a flawless 100% accuracy for RHT. The research findings can be implemented to precisely control the mixing of milk and its physical features at a molecular level, enabling more even heat distribution and faster, more efficient pasteurization or homogenization processes.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 271-309"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the bio-mechanisms of rod-shaped bacteria moving on rigid substrate coated with non-Newtonian Williamson slime","authors":"Zeeshan Asghar ,&nbsp;Rehman Ali Shah ,&nbsp;Muhammad Waris Saeed Khan ,&nbsp;Muhammad Asif Gondal","doi":"10.1016/j.cjph.2024.11.023","DOIUrl":"10.1016/j.cjph.2024.11.023","url":null,"abstract":"<div><div>Bacteria are single-celled organisms that come in various shapes and sizes, often classified based on characteristics like shape, DNA, and movement mechanisms. Among them, gliding bacteria have a unique way of moving: they slide along surfaces without external structures like flagella or cilia. Instead, they create wave-like motions along their surface to glide across slimy areas. How fast can bacteria move, and does their speed change on different surfaces? Do they glide faster on smooth surfaces or slow down on rough or sticky ones? And when they move through thicker, more complex fluids, how do they adapt, and does this impact their speed? Researchers have investigated these questions by studying how surface properties and fluid dynamics affect bacterial movement. This study also aims to analyze the locomotion of gliding bacteria over a layer of Williamson fluid with a rigid substrate using the dynamics of an undulating sheet. The methodology involves converting the fundamental partial differential equations into a fourth-order nonlinear ordinary differential equation through the Stokes flow approximation and solving it by the regular perturbation technique. The impacts of different physical parameters on gliding speed, flow rate, energy loss, and slime velocity are visually illustrated and discussed. The results show that the glider's speed decreases with a lower viscosity ratio, while higher Weissenberg numbers and occlusion ratios improve the glider's motility. Additionally, the flow rate of the Williamson fluid decreases as the viscosity increases, and power loss experienced by the glider rises with an increase in viscosity. These findings highlight how fluid properties influence bacterial movement and energy efficiency, providing insights for developing microfluidic devices and studying microbial motility.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 18-33"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic behavior of a cylindrical ferrimagnetic nanotube with spin-3/2 core and spin-3 shell","authors":"A. El Abbassi,&nbsp;M. Salama,&nbsp;N. Hachem,&nbsp;E.B. Choubabi,&nbsp;M. El Bouziani","doi":"10.1016/j.cjph.2024.12.005","DOIUrl":"10.1016/j.cjph.2024.12.005","url":null,"abstract":"<div><div>The effects of exchange interactions and crystal fields on the critical and magnetic behaviors of a mixed-spin cylindrical ferrimagnetic nanotube with spin-<span><math><mrow><mn>3</mn><mo>/</mo><mn>2</mn></mrow></math></span> core and spin-3 shell were studied using the mean-field approximation based on the Gibbs-Bogoliubov inequality. Typical magnetization curves and phase diagrams were established to explore various critical behaviors, including second and first-order phase transitions, compensation temperatures, and critical end-points. These characteristics and others are crucial for industrial applications of these systems.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 243-255"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolutionary dynamics of the travel mode choice behavior based on the replicator-mutator model","authors":"Fangxia Zhao ,&nbsp;Huayan Shang ,&nbsp;Tongfei Li","doi":"10.1016/j.cjph.2024.01.022","DOIUrl":"10.1016/j.cjph.2024.01.022","url":null,"abstract":"<div><div>In this paper, we use the evolution dynamics of the replicator-mutator equation to understand people's travel mode choices considering the traveler's bounded rationality. We define the notation of choice utility and introduce a novel choice model for the evolutionary dynamics of travel mode choice behavior. The choice utility can be calculated from the generalized travel cost, including direct and indirect economic costs (i.e., time and comfort costs, etc.). Taking Beijing traffic data as an example, this paper studies the evolution process of travelers' behavior and analyzes the impact of mutation parameters, travel distance, direct cost and comfort cost on travel mode selection behavior, the simulation results show some strategies to adjust the travel mode selection probability. This study can provide a theoretical reference for adjusting the urban travel distribution structure and optimizing the travel network.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 221-232"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139538421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transient free convective flow of viscoelastic nanofluids governed by fractional integrodifferential equations under Newtonian heating and thermal radiation","authors":"Zhi Mao ,&nbsp;Libo Feng ,&nbsp;Ian Turner ,&nbsp;Aiguo Xiao ,&nbsp;Fawang Liu","doi":"10.1016/j.cjph.2024.12.025","DOIUrl":"10.1016/j.cjph.2024.12.025","url":null,"abstract":"<div><div>The transient free convective flow of incompressible nanofluids past a vertical infinite plate with mass diffusion and Newtonian heating is investigated under the influence of thermal radiation. The fractional integrodifferential governing equations are first formulated from the generalized Maxwell constitutive relationship with dual fractional-order parameters. Some important physical quantities relevant to engineering, including the modified skin friction factor, Nusselt number, and Sherwood number, which are suitable for nanofluids, are also deduced. Then the dimensionless boundary layer equations of momentum, energy and concentration subject to the appropriate initial and boundary constraints, are solved numerically using the L1 formula and weighted-shifted Grünwald–Letnikov scheme. Some numerical illustrations are provided to demonstrate the impact of the key variables on the momentum, heat and mass transport properties for different nanofluids. The simulation findings reveal that both increasing the velocity fractional-order derivative parameter and decreasing the fractional-order integral parameter lead to a thicker momentum boundary layer. The inclusion of nanoparticles enhances fluid heat transfer performance. This study offers significant insight into the applicability of the fractional-order integrodifferential equations for characterizing the momentum, heat and mass transport properties of nanofluids.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 584-600"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lie Symmetries, exact solutions, and stability analysis of the (2+1)-dimensional modified Kadomtsev–Petviashvili equation in nonlinear wave dynamics and systems","authors":"Kumari Manju ,&nbsp;Abdul-Majid Wazwaz","doi":"10.1016/j.cjph.2024.12.022","DOIUrl":"10.1016/j.cjph.2024.12.022","url":null,"abstract":"<div><div>This paper analyzes the group invariant solutions of the modified Kadomtsev–Petviashvili (mKP) equation using the Lie symmetry approach. Due to its cubic nonlinearity, the mKP system has rich physical and mechanical relevance. Nonlinear waves propagate at nonuniform velocities, which can be described by nonlinear evolution equations (NLEEs) and their solutions using arbitrary functions. Integrating a nonlinear evolution equation displays the various aspects of natural occurrences. The Lie symmetry transformation method is responsible for reducing the number of independent variables in the system and forming ordinary differential equations (ODEs). These reduced ODEs are solved with some imposed parametric restrictions. These solutions are more general than previously established results due to the existing arbitrary functions. The derived solutions are mainly kink waves, anti-kink waves, negatons, positons and elastic multisolitons. Further, using bifurcation theory, stability analysis of the results has been shown to make the research more worthy. We use phase portraits to explore the remarkable characteristics of the exact wave solutions. These portraits confirm the existence of certain families of homoclinic and periodic orbits around the equilibrium points. Finally, a brief discussion on the solutions of mKP has been made, showing the richness of our results due to several arbitrary constants and functions.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 515-530"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electro-optical sensors based on two-dimensional c3n2 structures for non-invasive gastric cancer detection: A first-principles study","authors":"Roya Majidi","doi":"10.1016/j.cjph.2024.12.024","DOIUrl":"10.1016/j.cjph.2024.12.024","url":null,"abstract":"<div><div>In this study, we examined the potential of two newly predicted two-dimensional carbon nitride structures, namely P-C₃N₂ and I-C₃N₂, for use as sensors using density functional theory. The electronic and optical properties of monolayer and bilayer C₃N₂ sheets are studied, with a focus on their sensing capabilities for acetone, a volatile organic compound commonly found in the breath of individuals diagnosed with gastric cancer. Our findings indicate that the interaction between acetone and C₃N₂ sheets primarily involves physisorption, characterized by low adsorption energies. This weak binding enables easy desorption, enhancing the reusability of the C₃N₂ sheets as sensors. The semiconducting properties of the I-C₃N₂ sheet are not sensitive to acetone adsorption, whereas the P-C₃N₂ sheet exhibits a significant change in its band gap upon acetone adsorption. As the concentration of adsorbed acetone molecules increases, the band gap of monolayer and bilayer P-C₃N₂ sheets decreases, resulting in improved electrical conductivity. Moreover, it is demonstrated that the optical properties of monolayer and bilayer P-C₃N₂ are responsive to the presence and concentration of the acetone molecules. Our findings suggest that the P-C₃N₂ sheets have great potential as sensing materials for diagnosing gastric cancer through the detection of exhaled gases, even in the presence of interfering molecules.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 549-563"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}