Article
Chemistry, Physical
Ahmad Nauman Shah Saqib, Nguyen Thi Thu Huong, Soo-Whan Kim, Myung-Hwa Jung, Young Haeng Lee
Summary: In this study, highly Fe-doped ZnO nanoparticles were synthesized in a one-step process using solution plasma, without the need for additional chemicals. The doping levels of Fe in the nanoparticles are easily controllable, and the magnetization can be adjusted by manipulating the Fe content and composition of Fe2+ and Fe3+ ions. This approach provides a platform for studying magnetic properties of doped semiconductors for spintronic applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Shakeel Ahmed, Muhammad Ashraf, Sheraz Yousaf, Ibrahim A. Alsafari, Mehwish Akhtar, Muhammad Shahid, H. H. Somaily, Muhammad Farooq Warsi
Summary: This study demonstrates the fabrication and performance of glucose sensor based on zinc oxide nanoparticles (ZnO NPs) and their composite. ZnO nanostructures possess fascinating properties like large surface area, superior crystal nature and good electrical as well as optical properties. The prepared iron doped ZnO/rGO based composite showed greater sensitivity and electrocatalytic activity than other compositions considered in this study.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
Muhammad Shahid Nadeem, Tauseef Munawar, Faisal Mukhtar, Muhammad Naveed Ur Rahman, Muhammad Riaz, Faisal Iqbal
Summary: In this study, pure ZnO and iron (Fe) and cobalt (Co) co-doped ZnO nanoparticles were successfully synthesized and characterized using XRD, FTIR, SEM, and UV-vis spectroscopy. The results showed that the dopants influenced the structural parameters, energy bandgap, and photocatalytic activity of the ZnO nanoparticles. The optimized concentration of 6%Fe and 4%Co exhibited the highest photocatalytic efficiency and antibacterial activity against different dyes and bacterial strains.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
K. Chandramouli, B. Suryanarayana, T. Anil Babu, Vemuri Raghavendra, D. Parajuli, N. Murali, Venkaiah Malapati, Tulu Wegayehu Mammo, P. S. Shanmukhi, Umesh Reddy Gudla
Summary: The structure, particle size, and antibiotic nature of synthesized ZnO nanoparticles were studied using XRD, TEM, and FTIR, revealing spherical particles with a single wurtzite hexagonal crystal structure. The correlation between defect and antibiotic properties of ZnO was identified.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Islam Mohammad Shafiqul, Raj Deep, Jie Lin, Toshiyuki Yoshida, Yasuhisa Fujita
Summary: In this study, nitrogen-doped zinc oxide nanoparticles were successfully synthesized using the gas evaporation method with DC arc plasma. The nitrogen concentration was found to have an impact on the Raman spectra and photoluminescence spectra of the nanoparticles.
Article
Materials Science, Multidisciplinary
Md Maruful Islam, Toshiyuki Yoshida, Yasuhisa Fujita
Summary: This study investigates the properties of Ga-doped zinc oxide nanoparticle layers under various annealing atmospheres. The results show that Ga-doping successfully improves the electrical properties of the nanoparticle layers, and the atmospheric effects are confirmed through defect spectrum analysis.
Article
Materials Science, Multidisciplinary
Kamakshi Patel, M. P. Deshpande, S. H. Chaki
Summary: Zn(1-x)NixS nanoparticles with different Ni concentrations were successfully synthesized and their properties were studied using various characterization techniques. The results revealed that the Ni doping concentration affects the optical, structural, and magnetic behavior of the ZnS nanoparticles.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Environmental Sciences
Karanpal Singh, Nancy, Harpreet Kaur, Pushpender Kumar Sharma, Gurjinder Singh, Jagpreet Singh
Summary: The study synthesized undoped and Cobalt-doped zinc oxide nanoparticles (Co doped ZnO NPs) and confirmed the incorporation of the Co dopant through spectroscopic and microscopic techniques. The Co-doped ZnO NPs showed a red shift in the UV-absorption spectra and a decrease in band gap value, indicating successful integration of Co2+ ions into the ZnO matrix. The synthesized NPs exhibited excellent photocatalytic and antimicrobial activity, with 1% Co-doped ZnO showing the highest photocatalytic efficiency.
Article
Chemistry, Physical
F. F. H. Aragon, J. A. H. Coaquira, S. W. da Silva, R. Cohen, D. G. Pacheco-Salazar, L. C. C. M. Nagamine
Summary: The study focuses on the magnetic and electrical properties of Fe-doped indium tin oxide (ITO) and confirms the structure and properties of the material through various analysis methods. The results show that the sheet resistance increases with the Fe content, indicating a decrease in the density of conduction electrons as the iron content increases.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Shagufta Gulbadan, Muhammad Azhar Khan, Raqiqa Tur Rasool, Taharh Zelai, Khalid Mahmood, Muhammad Shahid, Altaf Hussain
Summary: The sol-gel auto-combustion process was used to synthesize M-type hexagonal ferrite powder samples with the chemical formula Ba0.3Sr0.7-xCoxFe12-ySmyO19 (x = 0-0.5, y = 0-0.05). The samples were analyzed using X-ray diffraction technique (XRD), Raman, and photoluminescence spectroscopies. The results showed that the samples possessed a hexagonal structure and had the impurity phase alpha-Fe2O3. The samples demonstrated semiconductor properties with a bandgap energy of 1.875 eV and were found to be suitable for microwave and high-frequency applications.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
F. Belkhiria, F. I. H. Rhouma, H. Gammoudi, M. Amlouk, R. Chtourou
Summary: This work presents the preparation and characterization of LaGaO3 perovskite material using the sol-gel based Pechini method at low temperatures. The material exhibited a pure orthorhombic phase, a band gap energy of 3.64 eV, and two blue bands in the photoluminescence spectra. The temperature dependence of the photoluminescence analysis showed an S-shape behavior.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Polymer Science
J. El Ghoul, F. F. Al-Harbi
Summary: Diluted magnetic (Er, V)-co-doped ZnO nanocrystals were synthesized using sol-gel method as a dilute semiconductor. The structural and optical properties were characterized, showing the appearance of wurtzite structure and defects related to Er doping. Raman measurements confirmed the good crystal quality after doping, and an increase in Er doping concentration led to a decrease in band gap energy.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Chemistry, Analytical
Nikita Sharma, Pradosh Prakash Sahay
Summary: The microstructural, optical, and photoluminescence characteristics of ZnO nanoparticles synthesized by solution combustion were studied for Ce-doped, Dy-doped, and co-doped at varying dopant concentrations. The nanoparticles showed high crystallinity and matched the standard hexagonal wurtzite structure of ZnO. The energy bandgap decreased upon doping and co-doping. A sharp ultraviolet emission peak at 398 nm originating from excitonic recombination was observed, as well as visible emission peaks attributed to electron transitions of Ce3+ and Dy3+ ions and native defects in ZnO. Co-doping of Ce and Dy enhanced the visible emissions (blue, yellow, and red), making the co-doped ZnO nanoparticles a promising material for energy-saving light sources.
Article
Chemistry, Multidisciplinary
E. Abdel-Fattah, S. Alotibi
Summary: This research investigated the synergetic effect of nonthermal plasma and ZnO nanoparticles on the degradation efficiency of methylene blue. The results showed that combining plasma with the right amount of ZnO can significantly enhance the degradation efficiency by providing additional hydroxyl radicals and exciting the ZnO catalyst.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Isha Gupta, Devender Singh, Sitender Singh, Pawan Kumar, Shri Bhagwan, Vinod Kumar
Summary: Green emitting Gd4-xAl2O9:xEr(3+) [x = 1 to 6 mol%] nanophosphors were synthesized and characterized. The nanomaterials exhibited a monoclinic structure and strong emission peaks, making them potential candidates for photonic appliances.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Environmental Sciences
Nur Jannah Idris, Suriani Abu Bakar, Azmi Mohamed, Muqoyyanah Muqoyyanah, Mohd Hafiz Dzarfan Othman, Mohamad Hafiz Mamat, Mohd Khairul Ahmad, Muhammad Danang Birowosuto, Tetsuo Soga
Summary: By hybridizing with graphene oxide and multi-walled carbon nanotubes solution, the efficiency of photocatalytic degradation of dyes was improved. Experimental results showed that the composite photocatalyst containing zinc oxide nanorods and titanium dioxide nanorods achieved the highest methylene blue degradation rate under the influence of GO_MWCNTs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Ceramics
Amr Attia Abuelwafa, M. S. Abd El-sadek, Sahar Elnobi, Tetsuo Soga
Summary: SnO thin films were deposited on ITO, FTO, and glass substrates using thermal evaporation technique, revealing amorphous structure and direct transitions in Tauc's relation. The study found that SnO/ITO exhibited higher nonlinear parameters compared to SnO/FTO, suggesting potential in nonlinear optics applications.
CERAMICS INTERNATIONAL
(2021)
Article
Environmental Sciences
R. Mohamat, A. B. Suriani, A. Mohamed, Muqoyyanah, M. H. D. Othman, R. Rohani, M. H. Mamat, M. K. Ahmad, M. N. Azlan, M. A. Mohamed, M. D. Birowosuto, T. Soga
Summary: Customized surfactants were used to assist in the direct synthesis of graphene oxide, leading to the fabrication of polyvinylidene fluoride nanofiltration membranes with enhanced antifouling properties and water permeability. Higher surfactants' tail number resulted in improved performance of the fabricated membranes.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
R. M. D. Matiur, A. A. Abuelwafa, S. Kato, N. Kishi, T. Soga
Summary: This study investigates the optical properties of SILAR-prepared BiOI and its derivatives films, revealing that nonlinear optical behavior decreases after phase transformation, opening up new possibilities for the application of BiOI-based materials in nonlinear optical devices.
Article
Materials Science, Ceramics
M. F. Malek, M. Robaiah, A. B. Suriani, M. H. Mamat, M. K. Ahmad, T. Soga, M. Rusop, S. Abdullah, Z. Khusaimi, M. Aslam, N. A. Asli
Summary: The waste cooking palm oil was utilized as a green carbon source for synthesizing graphene through double thermal chemical vapor deposition. The graphene synthesized at 1000 degrees C showed the highest quality with good crystallinity and hexagonal graphite structure. The presence of the graphene layer on Ni was confirmed by the highest reflectance in the visible light region shown in the UV-Vis result.
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Muqoyyanah, A. B. Suriani, A. Mohamed, N. Hashim, M. H. Mamat, M. K. Ahmad, M. H. D. Othman, M. A. Mohamed, M. D. Nurhafizah, M. D. Birowosuto, T. Soga
Summary: The study investigated different titanium dioxide nanostructures and phases for photoanode film in dye-sensitized solar cells. Rutile TiO2 nanorods-microcauliflowers film showed higher energy conversion efficiency and short-circuit current density due to increased dye adsorption and enhanced electron excitation.
BULLETIN OF MATERIALS SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
R. Matiur, A. A. Abuelwafa, M. A. A. Noman, S. Kato, N. Kishi, T. Soga
Summary: The investigation characterized BiOI electrochemical cells prepared by successive ionic layer adsorption and reaction (SILAR) through electrochemical impedance spectroscopy (EIS). The study found that at 30 SILAR cycles, the BiOI film exhibited the best structural uniformity and effective surface area, resulting in the lowest film resistance and charge transfer resistance, leading to maximum photovoltaic performance with a short-circuit current density of 0.6 mA/cm(2) and open-circuit voltage of 0.43 V.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Amr Attia Abuelwafa, Rucheng Zhu, Riteshkumar Vishwakarma, Sahar Elnobi, Sudip Adhikari, Tetsuo Soga, Masayoshi Umeno
Summary: In this study, laser irradiation was used to control the doping process of directly grown graphene, leading to the collection of gold particles on graphene network wrinkles which significantly enhance the electrical properties of graphene. This approach shows promise in designing transparent conductive electrodes for optoelectronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Optics
Amr Attia Abuelwafa, H. M. Alsoghier, Sahar Elnobi, M. Dongol, T. Soga
Summary: The research calculated the structural distortions of NiTPP molecules and fabricated NiTPP/FTO thin films using different methods. The increase in film thickness led to larger crystallite size and more uniform film morphology. Analysis of Raman spectra and optical properties indicated that these films exhibit strong nonlinear optical characteristics.
Article
Chemistry, Physical
R. M. D. Matiur, M. A. A. Noman, S. Kato, T. Soga
Summary: This study introduces a novel and simple synthesis method for BiOI film preparation, confirming the existence of stable BiOI film at 300-350 degrees C. It also discusses the transformation and stability of BiOI and BiI3 films under different temperature conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
M. F. Achoi, M. A. A. Noman, S. Kato, N. Kishi, T. Soga
Summary: This study proposed a method to prepare pinhole-free MBI film by multi-step spin coating, and found that the maximum solar cell performance was achieved at 8 layers of MBI. Subsequent increase in MBI layers led to a decrease in performance.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
M. F. Achoi, S. Aiba, S. Kato, N. Kishi, T. Soga
Summary: This paper reports on the influence of post-annealing on the properties of MBI perovskite solar cells fabricated through the HIM method. The results show that increasing the post-annealing temperature improves the crystallinity, surface morphology, and optical properties of the MBI film. As a result, the performance of the MBI solar cells is significantly enhanced, with a fivefold increase in power conversion efficiency.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Multidisciplinary Sciences
Suresh Sagadevan, Ramesh Poonchi Sivasankaran, J. Anita Lett, Is Fatimah, Getu Kassegn Weldegebrieal, Estelle Leonard, Minh-Vien Le, Tetsuo Soga
Summary: The synthesis and characterization of hematite (& alpha;-Fe2O3) nanoparticles (NPs) were conducted, and their photocatalytic properties were studied. The α-Fe2O3 NPs were found to have a rhombohedral phase confirmed by XRD, and FT-IR was used to analyze functional groups on the catalyst surface. The bandgap energy was determined to be 2.25 eV using UV-Vis DRS, and SEM images showed a spherical morphology. The α-Fe2O3 NPs exhibited oxidation and reduction properties as analyzed by CV. Under natural sunlight, the degradation efficiency of methylene blue (MB) dye using the α-Fe2O3 NPs reached 33% in 2 hours, with a pseudo-first-order rate constant of 0.0033 min(-1).
Article
Chemistry, Physical
V. Ratchagar, M. Muralidharan, M. Silambarasan, K. Jagannathan, P. Kamaraj, Suresh Kumar Subbiah, P. A. Vivekanand, Govindasami Periyasami, Mostafizur Rahaman, Perumal Karthikeyan, Girma Gonfa
Summary: The cobalt oxide (Co3O4) nanomaterials were synthesized through coprecipitation technique with pH values of 7, 8, and 9. The resulting nanomaterials exhibited ligand-metal coordination and showed emission peaks at 488 nm and 745 nm in the photoluminescence spectra. Vibrating sample magnetometry confirmed the magnetic nature of the samples. Fourier transform infrared (FT-IR) spectrum revealed absorption bands at 584 cm(-1) and 666 cm(-1), corresponding to Co-O and O-Co-O stretching modes, respectively. The SEM image demonstrated a morphological transformation of the Co3O4 nanomaterials from spherical to cubic to agglomerated shape with increasing pH. UV-Vis spectra showed absorption bands at 473 nm and 762 nm for materials prepared at pH 7 and 8, while at pH 9, the peaks shifted to higher wavelengths at 515 nm and 777 nm. The cyclic voltammetry curves indicated good charge propagation with the electrodes. The Nyquist plots exhibited a semicircle in the high frequency region and a vertical line in the low frequency region. These findings suggest that Co3O4 is a promising material for applications in light-emitting diodes, solar cells, and optoelectronic devices.
INTERNATIONAL JOURNAL OF PHOTOENERGY
(2023)
Article
Nanoscience & Nanotechnology
M. S. H. Choudhury, Sheik Erfan Ahmed Himu, Mahatab Uddin Khan, Md Zahid Hasan, Md Shafiul Alam, Tetsuo Soga
Summary: This study investigates the effect of compression temperature on the performance of Zinc Oxide (ZnO)-based dye-sensitized solar cells (DSSC). The results show that cells prepared at a compression temperature of 70 degrees Celsius under 60 MP pressure exhibit the most favorable photovoltaic performance. Scanning Electron Microscopy images confirm that a compression temperature higher than 70 degrees Celsius leads to defects on the photoelectrode surface.
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)
