Article
Chemistry, Inorganic & Nuclear
Rentapalli Vijaya Bharathi, M. K. Raju, P. S. V. Shanmukhi, M. Gnana Kiran, N. Murali, D. Parajuli, Tulu Wegayehu Mammo, K. Samatha
Summary: This study investigated the morphology, structure, DC electrical resistivity, and magnetic characteristics of cobalt-substituted magnesium ferrite materials. The results showed that the materials had a spinel cubic structure with spherical and polyhedral-shaped particles. The activation energy and saturation magnetization increased with higher cobalt concentrations.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Y. Shireesha, V. Rajesh, Yenda Srinivasa Rao, Ganimisetti Srinivasa Rao
Summary: Mg0.5Ni0.5Fe2-xCrxO4 (x = 0.0, 0.2, 0.4, and 0.6) ferrites were synthesized using the solid-state reaction route. The synthesized materials' crystal structure, microstructure, crystallite size, magnetic and resistivity properties were measured using XRD, SEM, FT-IR spectroscopy, VSM, and DC electrical resistivity measurements. The results showed that the synthesis was efficient and resulted in improved crystallite sizes in a single-phase cubic spinel structure. The addition of chromium ions resulted in changes in lattice constant, crystallite size, saturation magnetization, remanent magnetization, and coercivity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Ch. Komali, N. Murali, K. Rajkumar, A. Ramakrishna, S. Yonatan Mulushoa, D. Parajuli, P. N. V. V. L. Pramila Rani, Satheesh Ampolu, K. Chandra Mouli, Y. Ramakrishna
Summary: This work used the solid-state reaction method to prepare Mg1-xZnxFe2-yCryO4 (x = y = 0.0, 0.2, 0.4, and 0.6) soft ferrites. Their structural, morphological, vibrational, dc electrical, and magnetic properties were analyzed using XRD, SEM, FTIR, two probe methods, and VSM. All the ferrites had a cubic spinel structure and uniform spherical nanoparticles. Increasing magnesium concentration decreased the DC electrical resistivity, thereby changing the magnetic parameters applicable in daily life.
Article
Engineering, Electrical & Electronic
Saba Yousaf, Ishtiaq Ahmad, Mudassara Kanwal, Thamraa Alshahrani, Hala H. Alhashim, Nessrin A. Kattan, Hafiz Muhammad Tahir Farid, Ahmer Riaz, Taqi Mehran, A. Laref
Summary: Spinel ferrites with varying degrees of barium substitution were synthesized using sol-gel technique, leading to changes in lattice constant, density, resistivity, activation energy, magnetization, and coercivity. The addition of barium ions resulted in a decrease in temperature dependent resistivity, indicating semiconducting nature. High dc resistivity and low dielectric loss suggest these samples may be suitable for high-frequency devices.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
K. Chandramouli, Vemuri Raghavendra, P. V. S. K. Phanidhar Varma, B. Suryanarayana, Tulu Wegayehu Mammo, D. Parajuli, Paulos Taddesse, N. Murali
Summary: A series of Cr-substituted Co-Cu nanoferrite materials have been developed with increasing lattice parameter and decreasing dc resistivity as the Cr content rises, indicating semiconductor nature. VSM study was used for characterizing and estimating magnetic features.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Inorganic & Nuclear
Pasupuleti Vijayalaxmi, Ramya Mandala, Sreelatha Kunchalapalli, B. Suryanarayana, D. Jagadeeswara Rao, Y. Ramakrishna
Summary: In this study, rare earth Ce3+ substituted Cobalt ferrite nanomaterials, CoFe2-xCexO4 (x = 0.0, 0.04, 0.08, and 0.12), were prepared using the sol-gel auto-combustion method. Various techniques including XRD, FESEM, FTIR, DC electrical resistivity, and vibrating sample magnetometer were used to investigate the structural, dc resistivity, and magnetic properties of the samples. The results showed that the prepared samples had a cubic spinel structure without any impurity phase, and the crystallite size decreased with increasing Ce3+ content. The samples exhibited paramagnetic properties, and the DC resistivity decreased with increasing Ce3+ content.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Physics, Applied
S. Kuswanth Kumar, M. S. N. A. Prasad, A. Rama Krishna, B. Vikram Babu, B. Sathish Mohan, M. P. Rao, K. Samatha
Summary: Ferrites made of copper substituted Mg0.6-xZn0.4CuxFe2O4 (x = 0.0, 0.1, 0.2 and 0.3) exhibit high resistivity and magnetism. XRD, SEM, FT-IR, VSM, and dc electrical resistivity techniques were used to evaluate their structural, compositional, morphological, and functional characteristics. They possess a spinel structure in the Fd-3m space group, with particle sizes ranging from 1 to 1.56 μm after calcination at 1000°C. FT-IR analysis confirmed the spinel structure through absorption bands at 570-576 cm(-1) and 424-430 cm(-1) for higher and lower frequencies, respectively. The coercivity coefficient varies from 73.33 to 154.7 Oe depending on the composition, and the highest DC electrical resistivity is 10(6) Ω-cm at x = 0.1.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2023)
Article
Environmental Sciences
D. Nathiya, N. M. Alhaji, A. R. Mohamed Jahangir, M. Ismail Fathima, Mansour K. Gatasheh, Ashraf Atef Hatamleh, Sadaf Zehra, A. Ayeshamariam
Summary: In this study, ZnGa2O4 nanocomposites were synthesized via a hydrothermal method and used for the photocatalytic degradation of organic dyes under UV irradiation. The structure, morphology, size, and optical properties of ZnGa2O4 were characterized using various techniques, and the degradation process followed second-order kinetics. The results demonstrated high efficiency in degrading industrial dyes, suggesting potential for more efficient ZnGa2O4 nanocomposites for photocatalytic applications.
ENVIRONMENTAL RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
P. V. Prasanna Kumar, B. Suryanarayana, Vijaya Lakshmi Vemula, D. Jagadeeswara Rao, Susmitha Uppugalla, Y. Ramakrishna
Summary: La3+, Sm3+, Nd3+, and Gd3+ substituted Co-Ni system ferrite materials were synthesized using the solid-state reaction method. XRD, SEM, FTIR, DC electrical resistivity, and VSM studies were conducted. The results showed that RE3+ ions substituted Fe3+ ions in the B sites, and the samples exhibited a spinel structure. The lattice parameter of the substituted ferrites increased with the ionic size of the RE ions. SEM analysis indicated that the samples were agglomerated and almost spherical. The FTIR absorption bands confirmed the presence of spinel ferrites. D.C. electrical resistivity and saturation magnetization increased with the substitution of RE3+ ions.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
P. Rajapandi, G. Viruthagiri, Narmatha Shanmugam
Summary: The present study focuses on the synthesis and characterization of pure and Ni-doped alpha-Fe2O3 nanoparticles, as well as their structural, morphological, optical, magnetic, and antimicrobial properties. XRD analysis revealed the rhombohedral structure of the nanoparticles, with an average size of 39-47 nm. The addition of nickel resulted in a reduction in density dislocations, and UV-vis-DRS studies showed lower bandgap values for higher Ni-dopants. The nanoparticles displayed ferromagnetic behavior, as confirmed by VSM measurements. The antibacterial activity of the nanoparticles was assessed using the disc diffusion technique, which showed the highest inhibition zone against gram-positive bacteria at concentrations of 200 and 500 μg/ml.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Inorganic & Nuclear
M. Madhu, A. Venkateswara Rao, D. Parajuli, S. Yonatan Mulushoa, N. Murali
Summary: Sol-gel auto combustion method was used to prepare ferrite nanoparticles with Cr3+ substitution, showing a cubic spinel structure and decreasing crystallite size with increasing Cr3+ concentration. Magnetic and electrical measurements revealed that the saturation magnetization and coercivity decreased with increasing Cr3+ concentration, indicating a high resistant character.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Physics, Applied
Zuzana Bircakova, Peter Kollar, Jan Fuzer, Radovan Bures, Maria Faberova, Vladimir Vojtek
Summary: This paper systematically analyzes the DC magnetic properties of iron-based soft magnetic composite (SMC) materials in a wide maximum induction range (0.001 T-1.4 T) by applying different methods. The specific features of magnetization reversal of SMC materials, including the Rayleigh region of very low magnetic fields, are explored, which have potential applications in low-energy consuming electronic devices or ultra-low magnetic field shielding. The relationship between total permeability, coercive field, remanent magnetic induction, interparticle magnetic interaction, domain wall movability, and individual magnetization processes is investigated, and their dependence on magnetic induction and sample properties is revealed.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
I. M. Saavedra Gaona, E. Moncada-Villa, C. A. Ortiz-Otalora, J. Munevar, C. A. Parra Vargas
Summary: We conducted a systematic study on the structural and magnetic properties of LaBa1-xSrxCuFeO5+delta (La -x) and YbBa1-xSrxCuFeO5+delta (Yb-x) ceramic compounds. The experimental results show that the crystal structure, infrared spectrum, surface morphology, and composition of the materials change with different Sr contents. Vibrating sample magnetometry measurements indicate the presence of an antiferromagnetic transition only when x = 0.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
G. Vishnu Priya, N. Murali, M. K. Raju, Bal Krishan, D. Parajuli, Praveen Choppara, B. Chandra Sekhar, Ritesh Verma, Khalid Mujasam Batoo, P. V. Lakshmi Narayana
Summary: Cr3+-substituted NiZnCo ferrite nanoparticles were synthesized using the sol-gel auto-combustion method, and characterized by X-ray diffraction, field emission scanning electron microscopy, and Fourier transform infrared spectroscopy. The results revealed certain characteristics and properties of the nanoparticles.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Ceramics
Muhammad Shahzad Shifa, Waqar Ahmed Khan, Hind Albalawi, Tahani I. Al- Muhimeed, Abeer A. AlObaid, Q. Mahmood, Muhammad Azhar Khan, Shagufta Gulbadan, Zaheer Abbas Gilani, Imdadullah Qureshi
Summary: M-type hexa-ferrites powders were synthesized using the coprecipitation technique and subjected to heat treatment at different temperatures. The synthesized materials exhibited excellent structural and magnetic properties, showing potential for applications in high-frequency devices.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Condensed Matter
Memoona Mehmood, Muhammad Nasir Rasul, Altaf Hussain, Muhammad Amir Rafiq, Faisal Iqbal, Alina Manzoor, Muhammad Azhar Khan
Summary: In this study, the physical properties of novel antiperovskite materials XCRh3 (X = Cd, Ta, W, Re, Os, Ir, Pt, Au, Hg, Ce, Pr, Nd, Pm, Sm, Eu, Tb) were investigated using density functional theory. The study focused on structural, electronic, elastic, magnetic, and thermodynamic properties, and included the computation of mechanical parameters and analysis of thermodynamic properties under various pressures and temperatures.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Syeda Rabia Ejaz, Muhammad Azhar Khan, Shagufta Gulbadan, Muhammad Shahzad Shifa, Ghulam Murtaza
Summary: Nanocrystalline X-type hexaferrites with the composition Sr2-xCaxNi2-yBayFe28O46 (x = y = 0-0.5) were synthesized via sol-gel auto-combustion method. The inclusion of Ca-Ba significantly altered the porosity, X-ray density, and ac conductivity of the synthesized materials. The dielectric constant values of all compositions were higher than Sr2Ni2Fe28O46, making these materials suitable for high dielectric constant applications. VSM analysis showed decreased magnetic properties with increasing Ca-Ba concentration, suggesting potential use in memory devices, microwave absorption, and magnetic radar-absorbing materials for high-frequency applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Biology
Muhammad Asam Raza, Umme Farwa, Fatima Ishaque, Abdullah G. Al-Sehemi
Summary: Computational designing of four different series of thiazolidinone was conducted by condensing various amines with different aldehydes. In silico molecular investigations using density functional theory (DFT), molecular docking, and ADMET studies were performed. Quantum mechanical modeling approach with Gaussian predicted the electrochemical parameters of the compounds. Docking software was used to dock the compounds against PDB files of chickenpox, human immunodeficiency, hepatitis, and monkeypox virus. Molecular interactions were visualized with discovery studio, and D8 compounds showed the highest binding affinity against 4QWO (-13.383 kcal/mol). Compound D5 had the highest binding affinity against 1VZV (-12.713 kcal/mol). The drug-likeness of the designed compounds was assessed using Swiss ADME web tool, and it was concluded that these molecules had a drug-like structure with minimal violations.
COMPUTATIONAL BIOLOGY AND CHEMISTRY
(2023)
Article
Biology
Muhammad Asam Raza, Umme Farwa, Muhammad Danish, Seyhan Ozturk, Aysen Alaman Aagar, Necmi Dege, Shafiq Ur Rehman, Abdullah G. Al-Sehemi
Summary: Molecular modeling strategy was employed to assess the biological potential of imine based molecules against free radicals, acetylcholine esterase, and butyrylcholine esterase. Three Schiff based compounds were synthesized successfully and characterized using various techniques. The results showed that compound 3 exhibited the highest potential in terms of radical scavenging and enzyme inhibition. ADMET assessments also indicated that the synthesized compounds possessed drug-like properties. Overall, the study demonstrated the ability of the synthesized compounds to treat disorders associated with free radicals and enzyme inhibition, with compound 3 being the most active among them.
COMPUTATIONAL BIOLOGY AND CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Sajjad Ahmad Khan, Soumaya Gouadria, H. A. Alburaih, Asghar Nazir, Naseeb Ahmad, Muhammad Bilal Tahir, Salma Aman
Summary: The MnSe/FeSe2 nanocomposite, consisting of MnSe and FeSe2, was prepared by hydrothermal synthesis. The FeSe2 significantly affected the electrocatalytic oxidation, with an equal molar ratio of Mn and Fe during synthesis. The nanocomposite showed an onset potential of 1.511 V versus RHE and a Tafel slope of 43.90 mV dec(-1), making it suitable for electrochemical oxygen evolution reaction (OER). It outperformed the commercially available RuO2 catalyst and demonstrated efficient interaction between ferrous and manganese in OER electrocatalysis without the addition of metal ions to the MnSe crystalline structure. Hence, this composite catalyst holds promise for future electrochemical applications.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Polymer Science
Muhammad Danish, Saman Akram, Zeshan Ali Sandhu, Arusa Akhtar, Ataf Ali Altaf, Shafiq Ullah, Aaqib Ali, Muhammad Asam Raza
Summary: In this research study, triplumbic tetroxide (Pb3O4)/tricobalt tetroxide (Co3O4) nanocomposites (NCs) were synthesized using a modified process of inverse microemulsion for electrochemical applications. The NCs exhibited excellent capacitance performance, with the highest specific capacitance and energy density values of 892.01 F g(-1) and 60.70 W h g(-1) respectively. Even after 4000 cycles, more than 89% capacitance was sustained, demonstrating the excellent stability of the Pb3O4/Co3O4 composite. The enhanced supercapacitive properties of these NCs were attributed to their high surface area to volume ratio, enhanced conductivities, and good specific capacitance values achieved by modulating the Co3O4 content in the NCs.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Review
Chemistry, Analytical
Yasir Ullah, Mardeni Bin Roslee, Sufian Mousa Mitani, Sajjad Ahmad Khan, Mohamad Huzaimy Jusoh
Summary: This paper focuses on the issues of handover (HO) and mobility management in 5G heterogeneous networks (HetNets), and provides solutions and recommendations for future research.
Article
Environmental Sciences
M. Abdullah, G. Murtaza, Muhammad Azhar Khan
Summary: CuFe2O4 nanoparticles were synthesized via the sol-gel auto combustion method and hybridized with layer-structured graphene. The nanoparticles exhibited a crystallite size up to 53 nm, with variations depending on the copper ferrite content. Fourier transform infrared spectroscopy confirmed the presence of carboxyl stretching, aromatic stretching, and Fe-O bonds. Scanning electron microscopy images revealed the surface morphology of the nanoparticles and nanocomposites, while vibrating sample magnetometer results showed their magnetic properties. Energy dispersive X-ray spectroscopy and Brunauer-Emmett-Teller surface area analysis confirmed the composition and surface characteristics of the materials. The composite demonstrated excellent adsorption capacities for As(III) and As(V) due to the synergistic effect of CuFe2O4 and graphene.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Zeshan, Muhammad Suleman Waheed, Saad Ahmad Ishaq, Abubakar Siddique, Atta Ullah, El-Sayed M. Sherif, Mohd Zahid Ansari, Sajjad Ahmad Khan, Abdul Rauf Khan, Hafiz Muhammad Tahir Farid
Summary: This study investigated the properties of conductive polymers and related composites for EMI shielding. Ferrite/polyaniline (PANI) composites, with magnetic properties, have potential for multifunctional materials. The properties of PANI, gadolinium-substituted spinel ferrite, and their composites were compared and contrasted. Through various characterization methods, such as XRD and VSM, the crystalline ferrite phase and ferromagnetic properties of the nanocomposites were analyzed. The microwave properties of these materials play a significant role in the effectiveness of EMI shielding for microwave applications.
Article
Chemistry, Physical
Shahana Zainab, Waseeq Ahmad Siddiqui, Muhammad Asam Raza, Adnan Ashraf, Muhammad Pervaiz, Faisal Ali, Umer Younas, Aimon Saleem, Muhammad Ashfaq, Muhammad Nawaz Tahir
Summary: In this study, mononuclear complexes of oxicam precursor with Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) metal ions were successfully prepared. Various techniques were used to confirm the synthesis of transition metal complexes, including UV/Vis, FT-IR, 1H NMR spectroscopies, elemental analysis, and magnetic susceptibility measurements. The coordination geometry of the Cu(II) complex 5 was determined to be square planar based on XRD analysis. The compounds showed potential for COX-I and COX-II inhibition, indicating their potential anti-inflammatory properties.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Materials Science, Multidisciplinary
Asma M. Alenad, Muhammad Suleman Waheed, Salma Aman, Naseeb Ahmad, Abdul Rauf Khan, Rabia Yasmin Khosa, Mohd Zahid Ansari, Sajjad Ahmad Khan, Hafiz Muhammad Tahir Farid, Taha Abdel Mohaymen Taha
Summary: In this study, pure Fe2O3 and three different Ni-doped Fe2O3 nanoparticles with doping concentrations of 5%, 10%, and 15% were synthesized using an eco-friendly hydrothermal approach. The materials were characterized using various techniques, which confirmed the incorporation of Ni2+ ions into Fe2O3 and the reduction in particle size and aggregation. The Ni doping also resulted in a decrease in bandgap energy and an enhancement in photocatalytic activity. Among the samples, 10% Ni-doped Fe2O3 nanoparticles exhibited the highest methylene blue degradation after 100 minutes.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Physics, Condensed Matter
Muhammad Asif, Muhammad Junaid, Muhammad Azhar Khan, Raqiqa Tur Rasool, Muhammad Javed Akhter
Summary: The effect of Nd3+ ion substitution on the structural, morphological, ferroelectric, and dielectric properties of Y1xNdxFeO3 was investigated. The substitution changed the shape of particles and caused the splitting of vibrational characteristic bands. The substituted YFO exhibited increased dielectric constant and low dielectric losses, suggesting their potential use in multilayer chip inductors.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Physical
Majid Niaz Akhtar, Zainab Mufarreh Elqahtani, Sabih Qamar, Abdullah Almohammedi, M. Irfan, Muhammad Azhar Khan, Muhammad Yousaf, Atif Nazir, Yuzheng Lu, Mustafa Z. Mahmoud, Muhammad Aslam, Z. A. Alrowaili, M. S. Al-Buriahi
Summary: The absorption characteristics of Co, Cu, and Zn-doped Ni-Ce nano ferrites were investigated and it was found that the Zn-doped NiCe absorber showed excellent performance for Ku band absorption applications, making it suitable for next-generation multifunctional absorbers.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Ephrem Afele Retta, Richard Sutcliffe, Jabar Mahmood, Michael Abebe Berwo, Eiad Almekhlafi, Sajjad Ahmad Khan, Shehzad Ashraf Chaudhry, Mustafa Mhamed, Jun Feng
Summary: Cross-lingual and multilingual training can be an effective strategy for training an SER classifier when resources for a language are scarce. The difficulty of SER varies for different languages, and better results can be obtained by using two or three non-target languages for training.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Zaka Ullah, Abdul Majeed, Javed Rehman, Ejaz Ahmad Khera, Muhammad Azhar Khan, Fayyaz Hussain, Norah Salem Alsaiari, Muhammad Naeem Khan, Khadijah Mohammed Saleh Katubi, Van An Dinh
Summary: Ba1-xSrxZr0.3Ti0.7O3 materials with different Sr concentrations were synthesized using solid state reaction method. The structural properties and dielectric properties of the samples were investigated. The results showed that the diffusivity and dielectric constant varied with increasing Sr concentration.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Spyridon G. Kosionis, Emmanuel Paspalakis
Summary: In this study, we theoretically investigate the pump-probe response and the four-wave mixing spectrum in a hybrid system composed of a semiconductor quantum dot and a spherical metal nanoparticle. Using a density matrix methodology, we calculate the absorption/gain, dispersion, and four-wave mixing spectra, and analyze their spectral characteristics. We also apply the metastate theory and the dressed-state picture to predict the positions of the spectral resonances.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
L. S. Lima
Summary: This study investigates quantum correlation and entanglement in the non-Hermitian Hubbard model. By analyzing quantum entanglement measures such as entanglement negativity and entropy, the effect of non-Hermitian imaginary hopping on the system is explored. It is found that in the large... limit, the non-Hermiticity reverses the behavior of the ground state energy and low-lying excitations.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Nam-Chol Ri, Chung-Sim Kim, Sang-Ryol Ri, Su-Il Ri
Summary: By decreasing the lattice thermal conductivity of GNR through chemical derivation and strain, enhancing the thermoelectric properties of the electron part can be an important method to approach PGEC. This paper proposes synthesized hybrid systems formed by chemical derivation in the middle parts of b-AGNRs, and investigates the band structures and thermoelectric properties of the electron part under different strains. The results show that the band gaps of the systems significantly increase under different strains.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Le T. T. Phuong, Tran Cong Phong
Summary: This study investigates the effects of gas molecules adsorbed on /312-borophene on its electronic heat capacity and thermal Schottky anomaly. The results show that the adsorbed gas molecules have different impacts on the electronic heat capacity, leading to the generation of various new energy levels.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Tianyan Jiang, Jie Fang, Wentao Zhang, Maoqiang Bi, Xi Chen, Junsheng Chen
Summary: This paper investigates the adsorption and sensing properties of transition metal-doped WSSe gas-sensitive devices towards H2, CO, and CO2 gases related to thermal runaway in Li-ion batteries using density functional theory. The results show that Ti, Mn, and Mo dopants preferentially bind to the S-surface of the WSSe monolayer, and all three monolayers exhibit significantly improved sensing characteristics, with chemisorption towards CO. Band structure analysis suggests that the Ti-WSSe monolayer has the potential to be used as a resistive CO detection sensor. Recovery time calculations indicate the reuse capabilities of the gas-sensitive devices. Mn-WSSe monolayer shows potential for H2 detection, while Mo-WSSe monolayer is more suitable for CO2 detection. This work lays the foundation for potential gas-sensitive applications of WSSe monolayer in thermal runaway scenarios, advancing research in gas sensing domains.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Olga A. Alekseeva, Aleksandr A. Naberezhnov, Ekaterina Yu. Koroleva, Aleksandr Fokin
Summary: This study investigates the temperature dependence of crystal structure and dielectric response in a nanocomposite material containing porous glasses and embedded sodium nitrate. The results reveal a crossover point in the temperature dependence of the order parameter of the structural transition in sodium nitrate nanoparticles, as well as a decrease in activation energy of sodium ions hopping conductivity during heating.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Lijun Cheng, Fang Cheng
Summary: This paper investigates the effects of electric and magnetic fields on the Goos-Hanchen (GH) shift in a semi-Dirac system. The results show that the magnitude and direction of the GH shift depend on various factors such as incidence angle, electric barrier height and width, and magnetic field. It is observed that there is a saltus step in GH shifts at the critical magnetic field, which decreases with increased potential barrier thickness. Additionally, the GH shift can be significantly enhanced by applying an electric field in the III region. These findings are important for the development of semi-Dirac based electronic devices.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Alexander K. Fedotov, Uladzislaw E. Gumiennik, Julia A. Fedotova, Janusz Przewoznik, Czeslaw Kapusta
Summary: The study conducted an improved analysis of carrier transport in single-layer graphene and hybrid structures, showing the coexistence of negative and positive contributions in magnetoresistive effect. Various models were used to analyze the dependences on temperature and magnetic field, providing insights into the behavior of electrical resistance in the structures.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Xuhui Peng, Tao Chen, Ruotong Chen, Shizheng Chen, Qing Zhao, Xiaoping Huang
Summary: In this study, a novel method was proposed to design and fabricate optoelectronic devices with highly precise controlled photorefractive liquid crystal structures. By utilizing quantum dots and electric tuning, a regular periodic grating was formed in a quantum dot-doped liquid crystal volume illuminated by a laser standing evanescent wave field. The obtained optical diffraction pattern showed equally spaced light spots and high diffraction efficiency, indicating a significant change in the refractive index of the nanostructured device.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Kai-Hua Yang, Xiao-Hui Liang, Huai-Yu Wang, Yi-Fan Wu, Qian-Qian Yang
Summary: In this work, a theoretical model is proposed to achieve the controllability of quantum interference and decoherence. The effects of intralead Coulomb interaction, interdot tunneling, and electron-phonon interactions on differential conductance are investigated. The results show the appearance of destructive interference, Fano interference, and negative differential conductance in strong dot-lead tunneling regions, while a characteristic pattern of positive and negative differential conductances appears in the weak dot-lead tunneling regime.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Xueying Wang, Qian Ma, Qi Zhang, Yi Wang, Lingyu Li, Dongheng Zhao, Zhiqiang Liu
Summary: Porous double-channel alpha-Fe2O3/SnO2 heterostructures with tunable surface/interface transport mechanism were successfully fabricated by electrospinning and calcination. These heterostructures exhibited a large specific surface area, providing more active sites and enhanced adsorption capacity. The optimal composite materials showed the highest response value and the fastest response/recovery times to DMF, along with good cycling performance, long-term stability, and high gas selectivity.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Donglin Guo, Zhengmeng Xu, Chunhong Li, Kejian Li, Bin Shao, Xianfu Luo, Jianchun Sun, Yilong Ma
Summary: Using full electron-phonon interactions and the Boltzmann transport equation, this study investigates the phonon scattering channel and electrical properties of graphene under anharmonic phonon renormalization (APRN). The results show that the APRN reduces the phonon frequency and three-phonon phase space with increasing temperature, affecting the acoustic branch more than the optical branch. The thermal conductivity of graphene decreases after considering three- and four-phonon scattering, and the primary scattering channels are identified. Furthermore, the APRN increases the strength of electron-phonon coupling and leads to an increase in n-type electric resistance at room temperature.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Hongping Zhao, Man Zhao, Dayong Jiang
Summary: The study proposes a broadband photodetector with high response, high sensitivity, and controllable band by integrating quantum dots and highly conductive materials. The PD composed of ZnO film/PbS quantum dots heterostructure shows excellent photoresponse performance in the UV-Vis-NIR range, with the peak responsivity increased by 550%, accompanied by significant red shift, faster response, and recovery speed. By using RF magnetron sputtering to prepare ultra-thin ZnO film, the impact of PbS quantum dots on the photoelectric properties of ZnO film is comprehensively and systematically discussed.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Ye Xuan Meng, Liwei Jiang, Yisong Zheng
Summary: Manipulating magnetism by electrical means is an effective method for realizing ultra-low power spintronic-integrated circuits. In this study, it is demonstrated that the two-dimensional semiconductor material InO monolayer can be tuned to a half-metallic state by applying a gate voltage, providing theoretical guidance for adjusting two-dimensional magnetic semiconductors.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Anusha Kachu, Aalu Boda
Summary: In this research, we investigated the impact of confinement nature on a neutral hydrogenic donor impurity in a quantum dot. The study demonstrated intriguing behavior in response to changes in potential shape, quantum dot parameters, and spin-orbit coupling strengths. The findings provide valuable insights into the fundamental physics of quantum dots and impurities and can aid in the design and optimization of QD-based technologies.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)