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Catharanthus roseus-mediated CuAl2O4 nanocomposites for evaluation of killing kinetics

Chemosphere 2024年 359卷 142369页

作者： Potbhare, Ajay K. Yerpude, Sachin Daddemal-Chaudhary, Ankita R. Lambat, Ashish Mondal, Aniruddha Dadure, Kanhaiya M. Rai, Alok R. Abdala, Ahmed Chaudhary, Ratiram G. Department of Chemistry S. K. Porwal College of Arts and Science and Commerce Kamptee441001 India Department of Microbiology S. K. Porwal College of Arts and Science and Commerce Kamptee441001 India Lady Amritabai Daga College for Women of Arts Commerce and Science Nagpur440010 India Post Graduate Teaching Department of Botany RTM Nagpur University Nagpur440033 India Department of Biology Sevadal Mahila Mahavidyalaya Nagpur India Division of Materials Science Lulea University of Technology Lulea97187 Sweden Department of Chemistry Bajaj College of Science Wardha India Chemical Engineering Program Texas A&M University at Qatar Doha Qatar

The present article portrayed on the killing kinetic of human pathogenic bacteria using bioinspired mesoporous CuAl2O4 nanocomposites (NCs). The NCs was fabricated using leaf extract of medicinal plant Catharanthus roseus (CR) as a green reducer and stabilizer. As bio-fabricated material was calcined at 800 °C and characterized by several analytical techniques like X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Ultraviolet–Visible Diffuse Reflectance Spectroscopy (UV-DRS), Energy Dispersive X-Ray Spectroscopy (EDS), X-Ray Photoelectron Spectroscopy (XPS), Raman, Brunauer-Emmett-Teller (BET), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM) to authenticate its structure, phase, chemical bonding, chemical state, size and morphology behaviors. XRD and TEM revealed a reduced crystallite and nanoscale sizes of biosynthesized NCs. Moreover, XRD study exposed a cubic-structure of material, while transmission electron microscopy rendered an average particles size in range 10–15 nm. However, BET profile advocates a mesoporous nature of the particles. An effective biological molecular docking modulation assessed by substituting natural inhibitor by bioinspired NCs, while the protein PDB ID 4Z8D FabH as a receptor site for the present investigation. After assessment of molecular docking examination, the antibacterial activity of bioinspired NCs were performed against Staphylococcus aureus, Bacillus subtillis, Klebsiella pneumoniae and Escherichia coli using agar-well method. The broth culture method was employed on different pathogenic strains by kinetic growth assays and colony forming unit. © 2024 Elsevier Ltd

关键词： Nanocomposites

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Effect of storage conditions on the dietary and pharmaceutical values of ginger oil, and modeling its dielectric properties

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Grasas y Aceites 2024年第4期75卷

作者： Abushal, S.A. Uguru, H. Akpomedaye, O. Kuzmin, A. Sami, R. Helal, M. Alsanei, W.A. Almehmadi, A.M. ALmasoudi, A.G. Program of Food Sciences and Nutrition Turabah University College Taif University Saudi Arabia Department of Agricultural Engineering Delta State University of Science and Technology Ozoro Nigeria Department of Electrical Engineering Delta State University of Science and Technology Ozoro Nigeria Department of Mechanization of Agricultural Products Processing National Research Mordovia State University Saransk Russia Scientific Laboratory of Advanced Composite Materials and Technologies Plekhanov Russian University of Economics Moscow Russia Department of Food Science and Nutrition College of Sciences Taif University Saudi Arabia Department of Mechanical Engineering Faculty of Engineering Taif University Saudi Arabia Department of Food and Nutrition Faculty of Human Sciences and Design King Abdulaziz University Jeddah Saudi Arabia Department of Clinical Nutrition Faculty of Applied Medical Sciences Umm Al-Qura University Makkah Saudi Arabia Program of Food Sciences and Nutrition Biology Department Branch of the College at Turbah Taif University Taif Saudi Arabia

This research was conducted to evaluate the impact of the storage conditions of ginger rhizomes on the nutritional and therapeutic properties of the ginger oil (GO). The physicochemical and phytochemical properties, fatty acid contents and dielectric constant (Ε′) of the GO were analyzed in accordance with standard guidelines. The findings revealed that the storage temperature significantly impacted the quality of GO (p ©2024 CSIC.

关键词： Polyunsaturated fatty acids

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Construction of dual Z-scheme Ag3VO4–BiVO4/InVO4 photocatalysts using vanadium source from spent catalysts for contaminated water treatment and bacterial inactivation

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Chemosphere 2024年 363卷 142746页

作者： Lee, Kuen-Chan Hsu, Shih-Chieh Huang, Jen-Hsien Wang, Kuan-Syun Pang, Wei Kong Hu, Chih-Wei Jiang, Yi-Jhen Cho, Er-Chieh Weng, Huei Chu Liu, Ting-Yu Department of Science Education National Taipei University of Education No. 134 Sec. 2 Heping E. Road Da-an District Taipei City106 Taiwan PhD Program in Medical Neuroscience College of Medical Science and Technology Taipei Medical University 250 Wuxing Street Taipei City110 Taiwan Department of Chemical and Materials Engineering Tamkang University No. 151 Yingzhuan Road Tamsui District New Taipei City25137 Taiwan Department of Green Material Technology Green Technology Research Institute CPC Corporation No.2 Zuonan Rd. Nanzi District Kaohsiung City81126 Taiwan Department of Materials Engineering Ming Chi University of Technology New Taipei City243303 Taiwan Faculty of Engineering Institute for Superconducting & Electronic Materials University of Wollongong WollongongNSW Australia National Synchrotron Radiation Research Center 101 Hsin-Ann Road Hsinchu Science Park Hsinchu30076 Taiwan School of Pharmacy College of Pharmacy Taipei Medical University 250 Wuxing Street Taipei City110 Taiwan Department of Mechanical Engineering Chung Yuan Christian University No. 200 Chungpei Road Chungli District Taoyuan City32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan City32003 Taiwan College of Engineering & Center for Sustainability and Energy Technologies Chang Gung University Taoyuan33302 Taiwan

Vanadate-based photocatalysts have recently attracted substantial attention owing to their outstanding photocatalytic activity for degrading organic pollutants and generating energy via photocatalytic processes. However, the relatively high price of vanadium has hindered the development of vanadate-based photocatalysts for various applications. Spent catalysts obtained from oil refineries typically contain a significant quantity of vanadium, making them valuable for recovery and utilization as precursors for the production of high-value-added photocatalysts. In this study, we transformed the V present in spent catalysts produced by the petrochemical industry into ternary vanadate-based photocatalysts [BiVO4/InVO4/Ag3VO4 (BVO/IVO/AVO, respectively)] designed for water remediation. The ternary composites revealed an enhanced photocatalytic capability, which was 1.42 and 5.1 times higher than those of the binary BVO/IVO and pristine AVO due to the facilitated charge separation. The ternary photocatalysts not only effectively treated wastewater containing various organic dyes, such as methylene blue (MB), rhodamine 6G (R6G), and brilliant green (BG), but also exhibited remarkable photocatalytic performance in the degradation of antibiotics, reduction of Cr(VI), and bacterial inactivation. This paper proposes a feasible route for recycling industrial waste as a source of vanadium to produce highly efficient vanadate-based photocatalysts. © 2024 Elsevier Ltd

关键词： Water pollution

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Light-induced Weyl semiconductor-to-metal transition mediated by Peierls instability

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Physical Review B 2022年第20期106卷 205118-205118页

作者： Honglie Ning Omar Mehio Chao Lian Xinwei Li Eli Zoghlin Preston Zhou Bryan Cheng Stephen D. Wilson Bryan M. Wong David Hsieh Institute for Quantum Information and Matter California Institute of Technology Pasadena California 91125 USA Department of Physics California Institute of Technology Pasadena California 91125 USA Department of Chemical and Environmental Engineering Materials Science and Engineering Program and Department of Physics and Astronomy University of California Riverside California 92521 USA Materials Department University of California Santa Barbara California 93106 USA

Elemental tellurium is a strongly spin-orbit coupled Peierls-distorted semiconductor whose band structure features topologically protected Weyl nodes. Using time-dependent density functional theory calculations, we show that impulsive optical excitation can be used to transiently control the amplitude of the Peierls distortion, realizing a mechanism to switch tellurium between three states: Weyl semiconductor, Weyl metal, and non-Weyl metal. Further, we present experimental evidence of this inverse Peierls distortion using time-resolved optical second harmonic generation measurements. These results provide a pathway to multifunctional ultrafast Weyl devices and introduce Peierls systems as viable hosts of light-induced topological transitions.

关键词： Electron-phonon coupling Optical phonons Peierls transition Topological materials Topological phase transition Topological phases of matter Density functional theory Optical second-harmonic generation Time-resolved infrared spectroscopy

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Charge transport across LaMnO3 / Nd0.7Sr0.3MnO3 manganite interfaces: Role of swift heavy ion irradiation

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Ceramics International 2025年第17期51卷 23865-23880页

作者： Goswami, Hardika Rajyaguru, Bhargav Gadani, Keval Chondagar, N.A. Donga, Amiras Raval, Nisarg Negi, Puneet Ganesan, V. Kandasami, Asokan Shah, N.A. Solanki, P.S. Department of Physics Saurashtra University Rajkot360005 India Division of Solid State Physics Department of Materials Science and Engineering Uppsala University SE–751 03 Sweden Department of Physics Center of Education Indian Institute of Teacher Education Gandhinagar382016 India Department of Physics Akal College of Basic Sciences Eternal University Baru Sahib Himachal Pradesh 173101 India UGC–DAE Consortium for Scientific Research Mumbai Center BARC Campus Mumbai400085 India Medi–Caps University A.B. Road Pigdamber Rau Indore453331 India Inter University Accelerator Center Aruna Asaf Ali Marg New Delhi110067 India Department of Physics & Center for Interdisciplinary Research University of Petroleum and Energy Studies Dehradun248007 India

Interface in thin film is the most sensitive tool to alter the transport, magnetic and other physical properties of functional materials. In the present communication, LaMnO3/Nd0.7Sr0.3MnO3/SrTiO3 (LMO/NSMO/STO) manganite structures were prepared by sol–gel–assisted chemical solution deposition (CSD) followed by irradiation using 100 MeV O7+ high energetic ions. Irradiation induced modifications in the structural and microstructural aspects of LMO/NSMO/STO structures have been explored to understand the LMO/NSMO interface resistivity recorded under the influence of 5 μA applied interface current. Modifications in the LMO/NSMO interface resistivity through different thermal cycles, namely, zero field cooled cooling (ZFC), field cooled cooling (FCC) and field cooled warming (FCW) (ZFC–FCC–FCW protocol) have been understood based on the trapping or freezing and release of trapped electronic phase fractions. While metallic nature of the interface has been explored based on Zener double exchange (ZDE) polynomial law for charge conduction, the semiconducting nature of interface resistivity on small polaron conduction mechanism where variation in activation energy (Ea) with thermal cycle and ion fluence. Ion fluence and interface current influenced MR has been explored across the LMO/NSMO interface. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Activation energy

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Top-Down Fabrication of Diamond Nanostructures

SSRN

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SSRN 2024年

作者： Biswas, Abhijit Li, Chenxi Pieshkov, Tymofii Mei, Zhaobo Xu, Mingfei Li, Tao Murukeshan, Jishnu Vajtai, Robert Zhao, Yuji Ajayan, Pulickel M. Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States

Diamond nanostructures can have exciting applications in electronics and thermal management, but their controlled fabrication can be challenging. Here, we present a top-down approach for the fabrication of diamond nanorod (DNR) clusters, via use of metal masks (Al, Ag, Au, and Cr) and reactive-ion etching (RIE). Prolonged RIE on Ag and Cr masks yields distinct etching profiles, and DNR clusters are selectively formed from Ag masks, with individual nanorods having dimensions of ~100 nm diameter and ~1.5 µm length. Detailed electron microscopy shows thin layer of amorphous carbon (a-C) around single crystalline DNR cores. Chemical analyses also show presence of oxygen on the surface of the DNRs. Fabrication of the DNR clusters with scalable top-down approach could lead to new nanodiamond-based applications. © 2024, The Authors. All rights reserved.

关键词： Nanorods

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Incorporating nanoparticles in 3D printed scaffolds for bone cancer therapy

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Bioprinting 2023年 36卷

作者： Al Sawaftah, Nour M. Pitt, William G. Husseini, Ghaleb A. Materials Science and Engineering Program College of Arts and Sciences American University of Sharjah Sharjah PO Box: 26666 United Arab Emirates Chemical Engineering Department Brigham Young University Provo UT United States Chemical and Biological Engineering Department College of Engineering American University of Sharjah Sharjah PO Box: 26666 United Arab Emirates

The low occurrence rate of bone cancer contributes to delayed diagnosis and treatment;in addition, the surgical resection of bone tumors can cause significant bone defects, further hindering the effective treatment of the disease. 3D printing can help overcome some of these limitations by enabling the design and fabrication of innovative scaffolds loaded with chemotherapeutics and growth factors, stimulating bone regeneration, and delivering targeted cancer treatment. Moreover, advancements in nanotechnology have opened up new possibilities for bone tissue engineering. Nanoparticles (NPs) possess size-dependent physicochemical properties. NPs can also be designed to respond to specific stimuli enhancing localized drug delivery. These unique properties can be harnessed by embedding NPs in 3D-printed scaffolds to develop multifunctional bone scaffolds with enhanced mechanical properties and drug delivery capabilities. This review evaluates the impact of incorporating NPs in 3D-printed scaffolds on bone cancer therapy and bone regeneration. First, various 3D printing techniques employed in the biomedical field are presented and explained. The article then highlights notable achievements by researchers in this area. Finally, the review discusses the current obstacles facing this technology and how they can be addressed to enable translation into clinics. © 2023 The Authors

关键词： 3D printing Bone cancer Cancer therapy Nanoparticles Stimulus

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Low-voltage polarization switching in ferroelectric FinFET-based memory devices, using electric field nonlinearities

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Journal of Computational Electronics 2025年第3期24卷

作者： Natani, Shreyam Bandaru, P.R. Department of Mechanical Engineering Program in Materials Science & Engineering University of California San Diego La JollaCA92093 United States

Characteristics inherent to nonplanar geometries, with an aim to reduce program/erase voltages in ferroelectric field-effect transistor (FE-FET)-based memory devices, are proposed. The basis is the enhancement of the electric field in the FE films integrated with Fin-based FE-FETs (FE-FinFET), compared to FE films in planar FE-FETs. A new design (DE/FE-FinFET), based on combining FE and dielectric (DE) materials in the gate stack of FinFETs, is also proposed. Modeling and technology computer-aided design simulations indicate larger memory window at lower voltages in Fin-based FE-FETs. It is found that with nonplanar geometries a memory window can be observed at voltages 11% lower with FE-FinFETs and 33% lower with DE/FE-FinFETs compared to planar configurations. © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature 2025.

关键词： Ferroelectric films

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First-Principles Assessment of Chemical Lithiation of Sulfide Electrolytes and its Impact on Their Transport, Electronic and Mechanical Properties

SSRN

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SSRN 2022年

作者： Hao, Wei Lee, Myungsuk Hwang, Gyeong S. Materials Science and Engineering Program The University of Texas at Austin AustinTX78712 United States McKetta Department of Chemical Engineering The University of Texas at Austin AustinTX78712 United States SK Innovation Korea Republic of

Sulfide-based solid electrolytes (SEs) have received considerable attention, but their practical application is hindered by the lack of chemical stability. When in contact with Li metal, sulfide SEs may undergo decomposition induced by lithiation, which could be largely responsible for the high interfacial impedance observed between them. While the underlying mechanism is still uncertain, this first-principles study examines the structural evolution of sulfide materials, Li3PS4 and Li10GeP2S12, upon lithiation and its impact on their transport, electronic and mechanical properties. Our calculations demonstrate that the lithiation reaction is thermodynamically favorable until reaching full lithiation in which PS43- and GeS44- tetrahedral anions are completely decomposed to S2-, P3- and Ge4- atomic ions. This process is also found to involve the transition formation of small P(Ge) clusters and more importantly an increase in the relative density which may cause void formation at the Li metal/SE interface. Moreover, our analyses highlight that, even when fully lithiated, the sulfide materials could retain the high Li-ion conductivity as well as the ability to block electron transport. This suggests that the chemical decomposition of sulfide SEs would not be the only factor that is responsible for the increase of interfacial impedance during electrochemical cycling. © 2022, The Authors. All rights reserved.

关键词： Solid electrolytes

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On the second law of thermodynamics: a global flow spontaneously induced by a locally nonchaotic energy barrier

arXiv

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arXiv 2022年

作者： Qiao, Yu Shang, Zhaoru Program of Materials Science and Engineering University of California La Jolla San DiegoCA92093 United States Department of Structural Engineering University of California La Jolla San DiegoCA92093-0085 United States

People are well aware that, inherently, certain small-scale nonchaotic particle movements are not governed by thermodynamics. Usually, such phenomena are studied by kinetic theory and their energy properties are considered "trivial". In current research, we show that, beyond the boundary of the second law of thermodynamics where Boltzmann’s H-theorem does not apply, there are also large-sized systems of nontrivial energy properties: when the system is isolated, entropy can decrease;from a single thermal reservoir, the system can absorb heat and produce useful work without any other effect. The key concept is local nonchaoticity, demonstrated by using a narrow energy barrier. The barrier width is much less than the nominal particle mean free path, so that inside the barrier, the particle-particle collisions are sparse and the particle trajectories tend to be locally nonchaotic. Across the barrier, the steady-state particle flux ratio is intrinsically in a non-Boltzmann form. With a step-ramp structure, the nonequilibrium effect spreads to the entire system, and a global flow is generated spontaneously from the random thermal motion. The deviation from thermodynamic equilibrium is steady and significant, and compatible with the basic principle of maximum entropy. These theoretical and numerical analyses may shed light on the fundamentals of thermodynamics and statistical mechanics. © 2022, CC BY.

关键词： Statistical mechanics

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