Article
Materials Science, Ceramics
Khan Alam, Mohammad B. Haider, Mohammad F. Al-Kuhaili, Khalil A. Ziq, Bakhtiar Ul Haq
Summary: Chromium nitride thin films were prepared by reactive radio frequency magnetron sputtering, and their properties were studied in relation to the nitrogen to argon flow rate ratio and film composition. The results show that the film composition, band gap, and electronic phase transition are influenced by the gas flow ratio and film composition.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
I. Riahi, B. Khalfallah, F. Chaabouni
Summary: In this study, the radiofrequency magnetron sputtering method was used to deposit ZnSnO3 thin films with good crystallinity and optical transparency by controlling the substrate temperature. Characterization studies revealed that the deposition temperature significantly influenced the structure, morphology, and electrical properties of the films.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Geon-Hyeong Kang, Ki Chul Jung, Jongbum Kim, JoonHyun Kang, In Soo Kim, Young-Hwan Kim
Summary: In this study, high-quality KTa1-xNbxO3 thin films were grown using multi-target RF magnetron co-sputtering. The films exhibited a ferroelectric phase at room temperature with a Curie temperature of around 403 K, and their optical constants were similar to those of single crystals. This research provides a simple method for fabricating high-quality perovskite KTN thin films with desired properties.
Article
Multidisciplinary Sciences
A. Ismail, M. J. Abdullah, M. A. Qaeed, Mohammed A. Khamis, Bandar Ali AL-Asbahi, Saif M. Qaid, W. A. Farooq
Summary: The study fabricated p-type ZnO thin films using co-doping technique and identified ideal RF power values for obtaining p-type ZnO. Structural, optical and electrical properties of the prepared films were inspected using XRD, PL spectra, and Hall measurements.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2021)
Article
Chemistry, Physical
Joanna Banas-Gac, Marta Radecka, Adam Czapla, Edward Kusior, Katarzyna Zakrzewska
Summary: Thin film bilayers of TiO2/CuO with intentionally varied thickness of the top layer of TiO2 were characterized using various techniques. It was found that CuO bottom layer crystallized in a monoclinic structure while TiO2 top layer remained amorphous. The film roughness of CuO decreased with increasing thickness of TiO2 layer. X-ray absorption spectroscopy revealed the presence of Cu+ and Cu2+ in TiO2 top layer. Photoelectrochemical measurements showed that the TiO2/CuO bilayers acted as photocathodes in water splitting, with photocurrent density increasing with increasing TiO2 layer thickness.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
S. K. Singh, V. V. Siva Kumar, Pravin Kumar
Summary: In this study, the effects of ion irradiation on RF-sputtered ZnO thin films were investigated using various techniques. The results showed that ion irradiation can improve the crystallinity of the films, change their surface features, and alter their optical properties.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Shinho Cho
Summary: In this study, RF-sputtered Eu3+-doped NaTaO3 thin films were grown at different deposition temperatures. The results showed that the thin films contained mixed phases of NaTaO3 and Na2Ta8O21, and the optimal photoluminescence intensity and optical properties were achieved at a specific growth temperature.
CURRENT APPLIED PHYSICS
(2022)
Article
Chemistry, Analytical
M. Toma, R. Domokos, C. Lung, D. Marconi, M. Pop
Summary: This article describes the influence of deposition parameters on the structural, morphological, optical, and electrical properties of ZnO thin films doped with Ga and co-doped with (Ga + Nd). The thin films were fabricated using RF magnetron sputtering with a power of 100 W and a deposition distance of 6 cm. XRD analysis was used to analyze the influence of doping on the film structure. Optical transmission measurements showed a decrease in transparency when dopants were added, and AFM analysis revealed that the type of doping affected the microstructure of the films. Raman and resistivity measurements confirmed successful incorporation of dopants into the ZnO host material.
ANALYTICAL LETTERS
(2023)
Article
Chemistry, Physical
Arun Kumar Mukhopadhyay, Avishek Roy, Gourab Bhattacharjee, Sadhan Chandra Das, Abhijit Majumdar, Harm Wulff, Rainer Hippler
Summary: The surface stoichiometry of Tix-CuyNz thin film was investigated as a function of film depth using high power impulse and DC magnetron sputtering. X-ray photoelectron spectroscopy revealed the composition of Ti, Cu, and N in the deposited film. The presence of Cu3N and Ti3CuN phases in the film was confirmed by grazing incidence X-ray diffraction and transmission electron microscopy, respectively.
Article
Engineering, Electrical & Electronic
Z. Zaaboub, F. Hassen, L. Chaabane, H. Maaref
Summary: Results of steady-state and time-resolved photoluminescence measurements on ZnO thin films deposited on (001) p-doped silicon substrate by DC reactive sputtering technique show that growth time affects the intensity of exciton and visible emission, while an increase in slow decay component leads to a reduction in non-radiative pathways.
MICROELECTRONICS JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Giji Skaria, Ashwin Kumar Saikumar, Akshaya D. Shivprasad, Kalpathy B. Sundaram
Summary: Copper indium oxide thin films were deposited using RF magnetron sputtering and annealed at various temperatures, leading to increased grain size and crystallinity. The films exhibited high optical transmission and a small bandgap change during annealing.
Article
Materials Science, Multidisciplinary
Li-Ping Peng, A-Ling He, Liang Fang, Xiao-Fei Yang
Summary: High conductive and transparent indium-doped zinc oxide (IZO) thin films were successfully deposited on glass substrates using radio-frequency magnetron sputtering at low temperature. The influence of deposition pressure on the properties of the films was significant, and the film deposited at 2.0 Pa showed the best performance.
Article
Materials Science, Multidisciplinary
Holger Schwarz, Thomas Uhlig, Niels Roesch, Thomas Lindner, Fabian Ganss, Olav Hellwig, Thomas Lampke, Guntram Wagner, Thomas Seyller
Summary: This study analyzed thin films deposited via magnetron sputtering from two different preparation methods of CoCrFeNi High-Entropy Alloy targets and found that their stoichiometry, phase composition, and microscopic structure were almost identical after film deposition with the same parameters.
Article
Engineering, Electrical & Electronic
Chunhu Zhao, Junfeng Liu, Yixin Guo, Yanlin Pan, Xiaobo Hu, Guoen Weng, Jiahua Tao, Jinchun Jiang, Shaoqiang Chen, Pingxiong Yang, Junhao Chu
Summary: The study optimized aluminum doped ZnO thin films using RF magnetron sputtering, achieving high-quality optical and electrical properties. The optimized films demonstrated excellent optical and electrical characteristics at low resistivity, making them suitable as front contact layers in solar cell applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Woochan Jin, Kyounghee Park, Jun Young Cho, Sung-Hwan Bae, Muhammad Siyar, Chan Park
Summary: A smart window based on VO2 is a promising thermochromic glass that can regulate heat flow through windows by solar modulation near room temperature. It requires TC glass with high visible-light transmittance and large difference in infrared transmittance between high- and low-temperature VO2 phases to save energy.
CERAMICS INTERNATIONAL
(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)