Article
Materials Science, Multidisciplinary
R. Sreekanth, Jayadev Pattar, A. Anupama, A. M. M. Mallikarjunaswamy
Summary: Magnesium oxide (MgO) nanoparticles were successfully synthesized using a simple precipitation method, resulting in small size and high surface area. These nanoparticles have potential applications as catalysts and in the next generation biosensor applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Applied
Junhyuck Im, Jaewoo Jung, Kiho Yang, Donghoon Seoung, Yongmoon Lee
Summary: This study investigated the structural changes in zeolites fully exchanged with Sr, Cd, and Pb at temperatures ranging from room temperature to 350 degrees Celsius. The results showed that zeolites are easily dehydrated at high temperatures, and Sr and Pb may not have thermal stability while Cd remains intact.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Crystallography
Duc-Chau Nguyen, Chia-Chin Chu, Aswin Kumar Anbalagan, Chih-Hao Lee, Chia-Seng Chang
Summary: In this study, the bonding of metal-oxygen in the Ce-doped LaCoO3 system was explored using Rietveld refinement and synchrotron X-ray absorption techniques. The results showed that the addition of Ce caused a change in the structure of LaCoO3, making it best described by a cubic symmetry model. It was also found that Ce4+ was a more compatible dopant than Ce3+. X-ray absorption data supported the presence of partially filled La 5d-band and La-O bonds in pristine LaCoO3.
Article
Chemistry, Physical
Jiaxin Gong, Jiheng Li, Xiaoqian Bao, Ruifen Hou, Xuexu Gao
Summary: The crystal structure and magnetic structure of Tb-Dy-Fe compounds were studied before and after annealing heat treatment, revealing the existence of tetragonal and rhombohedral phases at room temperature. The volume proportion of the hexagonal phase increased after heat treatment, and the effect of structural distortion on the magnetostriction of Tb-Dy-Fe was discussed based on analytical results.
Article
Chemistry, Physical
Harikrishnan Ravichandran, Baskaran Irusan, Sathyaseelan Balaraman, Mani Govindasamy, Senthilnathan Krishnamoorthy, Manikandan Elayaperumal
Summary: In this study, rare earth Erbium metal incorporated orthoferrite nanoparticles were successfully synthesized and characterized using microwave-assisted technique. The unit cell structure was confirmed to belong to the orthorhombic-cubic phase with slightly induced distortion in bond distance between atoms. The vibrational frequencies of Er-O and Fe-O groups were observed and calculated, with a band gap of 2.1 eV and weak ferromagnetic property observed in the synthesized nanoparticles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Kenji Iwase, Shuhei Ishida, Takashi Ueno, Kazuhiro Mori
Summary: This study investigated the residual hydrogen occupation mechanisms in MgZn2-type and CaCu5-type cells during the hydrogen absorption-desorption process. The results revealed the structural changes and deuterium occupation in NdNi3Dx and provided insights into the preferred deuterium sites in different cell types.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Seohee Yun, Yongjae Lee
Summary: Birnessite is a layered manganese oxide mineral with various interlayer cations and water molecules. Cation substitution can alter its crystal structure and chemical properties. The distribution of interlayer cations and water molecules affects the interlayer spacing and the oxidation state of Mn.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Manish Taunk, Sunil Kumar, Amit Aherwar, Yongho Seo
Summary: This study investigates the structural and optical properties of doped CuI nanocrystals synthesized using a facile chemical method. X-ray diffraction and X-ray photoelectron spectroscopy were employed to characterize the crystal structure, morphology, and dopant incorporation.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2024)
Article
Engineering, Multidisciplinary
Ruiqi Zhao, Li Zhang, Benkai Guo, Yang Chen, Guangxin Fan, Zuquan Jin, Xuemao Guan, Jianping Zhu
Summary: Understanding the doping behaviors of impurity ions in mineralogical compositions is essential for optimizing the quality of sulphoaluminate cement clinker. This study systematically investigated the substitution preference of chromium in SAC clinker, showing that doping preference can be controlled by tuning the mineralogical compositions to control the valence state of Cr ions.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Ceramics
Maryam Hasanzadeh Esfahani, Hojjat Naji, Casey A. Marjerrison, John Greedan, Mahdi Behzad
Summary: Two new RESmTi2O7 mixed metal oxides were synthesized using a modified solid state method. Characterization and analysis of the samples revealed the crystallographic parameters and crystal structure of the materials. Qualitative and quantitative phase analysis demonstrated the significant impact of RE ionic radius variations on the crystal structure of the pyrochlores.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Condensed Matter
Mekonnen Tefera Kebede, Venus Dillu, Sheela Devi, Sunil Chauhan
Summary: In this study, Bi1-xSmxFeO3 nanoparticles were prepared using sol-gel technique, and it was observed that the substitution of Sm led to a structural transformation from rhombohedral to orthorhombic, affecting the ferromagnetic properties.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Engineering, Electrical & Electronic
Pradeep Prajapat, Saroj Dhaka, H. S. Mund
Summary: Nanocrystalline Mg-ferrites were synthesized using a low-cost sol-gel auto-combustion method in this study, and the effect of annealing temperature on their physical properties was investigated. The results showed that both the crystalline size and saturation magnetization of the materials increased with increasing annealing temperature.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Surinder Singh, Anumeet Kaur, Parwinder Kaur, Lakhwant Singh
Summary: Novel solid solutions of Na0.5Bi0.5TiO3 with LaCoO3 were fabricated using the sol-gel technique. The structure of the solid solution was found to deform, with an increasing molar percentage of the monoclinic phase as the concentration of LaCoO3 increased. The SEM micrographs showed a dense microstructure and well-packed arrangement of grains. XPS analysis revealed the presence of oxygen vacancies and their decrease with an increase in LaCoO3 concentration. The addition of Co resulted in weak ferroelectric and ferromagnetic behavior of the samples.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
M. A. I. Zainuddin, N. Ibrahim, Z. Mohamed
Summary: This study focuses on the variations in structural, electrical, and magnetic behavior exhibited by the new perovskite compound of La0.7Pb0.3-xBixMnO3 (x = 0-0.04). The samples were synthesized using the conventional solid state preparation method. Various analytical techniques including XRD, SEM, FTIR, UV-Vis, AC susceptibility, and VSM were used to determine the structural properties, morphological properties, optical energy bandgap, conduction mechanisms, and magnetic properties of the samples. The results reveal significant insights into the properties and behavior of the compound.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Kenji Iwase, Seiya Mashii, Kazuhiro Mori
Summary: The crystal structure and hydrogenation properties of La2Co7 with a Ce2Ni7-type structure were investigated through XRD and P-C isotherm analyses. The maximum hydrogen capacity reached 0.79 H/M, with 0.50 H/M remaining after the first full desorption. The reversible hydrogen capacity decreased to 0.24 H/M in the second absorption-desorption cycle.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
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)