Article
Chemistry, Multidisciplinary
Haowei Xie, Chenxu Kang, Muhammad Ahsan Iqbal, Xiaoliang Weng, Kewen Wu, Wei Tang, Lu Qi, Yu-Jia Zeng
Summary: This study proposes a strategy for regulating ZnO ultraviolet photodetectors using ferroelectric gates, which effectively reduces dark current and improves responsivity and detectivity. This strategy provides new insights for the fabrication of high-performance photodetectors.
Article
Thermodynamics
Licheng Deng, Jian Jiang, Dingli Zhang, Lin Zhou, Yuming Fang
Summary: The research on vibration energy harvester (VEH) for rotational applications is of great significance. By proposing a self-tuning piezoelectric VEH and establishing a rigid-flexible coupling model, wide frequency matching can be achieved. Numerical analysis results show that the VEH can achieve good performance within the range of 8-28 Hz.
Article
Mathematics
Milan Hofreiter, Michal Moucka, Pavel Trnka
Summary: This paper presents a newly implemented self-tuning PID controller that utilizes a relay feedback identification method for determining the mathematical model of the process and adjusting the controller parameters. It demonstrates the applicability of the controller to various systems, including those with transport delays. The advantage of the relay method is its lower computational intensity, making it suitable for implementation on energy-efficient microcontrollers.
Article
Chemistry, Inorganic & Nuclear
Adarsh K. Mourya, Rudra P. Singh, Tarun Kumar, Awanti S. Talmale, G. S. Gaikwad, Atul V. Wankhade
Summary: A facile one-pot method was developed to prepare three-dimensional hierarchical nanostructures of ZnO with enhanced photocatalytic activity. The proper selection of template, base, and microwave irradiation conditions allowed good control over their morphologies. The study revealed that the morphology of ZnO particles significantly affected their photocatalytic activity, with ZnO nanorods exhibiting the highest degradation efficiency. The material exhibited excellent durability and reproducibility, making it a promising candidate for photocatalytic applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Srijita Nundy, Aritra Ghosh, Asif Tahir, Tapas K. Mallick
Summary: High-quality Hf-ZnO thin films were successfully synthesized with varying Hf contents, exhibiting superhydrophilic and ultrahydrophobic wetting behaviors. Hafnium doping plays a significant role in tuning the nanostructure morphology, surface roughness, defect formation, Lewis acid-base interactions, and wettability properties of the materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Automation & Control Systems
Weihan Li, Qianfan Zhang, Chao Cui, Guo Wei
Summary: This article discusses the issue of frequency deviation caused by parameter drift in the wireless power transfer system and proposes a self-tuning method using switched capacitors to address this problem. The proposed method can restore load-independent constant current characteristics and increase output power capacity.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Licheng Deng, Jian Jiang, Lin Zhou, Dingli Zhang, Yuming Fang
Summary: The novel frequency self-tuning Vibration Energy Harvester (VEH) adjusts two parameters simultaneously to achieve frequency self-matching under rotating excitation, enabling frequency self-matching in the range of 10-20 Hz with easy spring design.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2021)
Article
Nanoscience & Nanotechnology
Andrea Orsini, Christian Falconi
Summary: In this study, electro-mechanical resonators were used as substrates to monitor the growth of nanostructures in real time, enabling the feedback-assisted tuning of low-cost electro-mechanical resonators by ZnO nanowires. This approach allows for post-fabrication tuning of resonant frequency with high accuracy and range, without requiring expensive facilities. The results have potential applications in electronics, sensors, and material science.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Xuemei Yuan, Menglin Wu, Jiupai Ni, Yongyi Cheng, Chengsheng Ni
Summary: Photocatalysis is a green and sustainable strategy for environmental remediation, utilizing solar energy to accelerate the degradation/oxidation of pollutants. The efficiency of photocatalysis can be improved by creating a heterojunction and optimizing the microstructure of the semiconductor catalysts to manipulate the transfer of charge carriers. The re-oxidation of a visible light photocatalyst, (Ga, Zn)(N, O) (ZGN), was used to produce ZnO/GaN(O) heterojunctions with different surface properties for efficient NO oxidation. The ZGN-550 heterojunction showed significantly higher oxidation efficiency than the pristine ZGN under visible light, due to the nanoscale discrete ZnO promoting charge carrier separation and the formation of reactive radicals.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Reshalaiti Hailili, Xiaokaiti Reyimu, Zelong Li, Xu Lu, Detlef W. Bahnemann
Summary: Effective removal of dilute nitrogen oxide (NO, ppb) without NO2 emission is still challenging in environmental pollution control. The construction of photocatalysts with diversified microstructures and atomic arrangements has been found to promote NO adsorption, activation, and complete removal without secondary pollution. In this study, the microstructure of ZnO photocatalysts was regulated by altering the reaction temperature and alkalinity, resulting in enhanced NO removal and reduced NO2 yields through defect-related surface-interface aspects. Mechanistic exploitations revealed that regulated microstructures, defect-related charge carrier separation, and strengthened surface interactions contributed to improved NO removal and simultaneous avoidance of NO2 formation. This investigation sheds light on the facile regulation of microstructures and the roles of surface chemistry in the oxidation of low concentration NO in the ppb level upon light illumination.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Siddhartha Saggar, Stephen Sanderson, Desta Gedefaw, Xun Pan, Bronson Philippa, Mats R. Andersson, Shih-Chun Lo, Ebinazar B. Namdas
Summary: A study on bulk heterojunction OPDs based on PTNT and PC71BM is presented, with a f(-3dB) response speed of 0.8 MHz and the ability to increase it to 4.5 MHz by tuning the blend ratio, offering a new approach for faster next-generation light sensors.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Physics, Applied
Giada La Gala, John P. Mathew, Pascal Neveu, Ewold Verhagen
Summary: This study presents a mechanical design strategy to address the multimode problem in optomechanical sensors, improving their performance and sensitivity. The spectral design approach enhances the robustness of mechanical symmetries and effectively increases the signal to noise ratio.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
David Vass, Andras Szenes, Balazs Banhelyi, Maria Csete
Summary: The study investigates the effects of different geometric parameters and the orientation of emitters on superradiance. It is found that larger total fluorescence enhancement and better superradiance performance can be achieved in different geometries of nanoresonators.
Article
Materials Science, Ceramics
Yin Wu, Dai-Bing Zhang, Zhao Zhao, Jun Pei, Bo-Ping Zhang
Summary: C-doping in ZnO was achieved through a facile and speedy SPS technique, improving electrical conductivity and power factor by reducing band gap and increasing carrier concentration. Meanwhile, introduced point defects strengthened phonon scattering and decreased thermal conductivity, leading to a peak ZT value of 0.024 at 773 K for Zn(O,C) bulk. This demonstrates that C-doping in ZnO is an effective and convenient strategy to enhance thermoelectric performance.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Catia Azenha, Cecilia Mateos-Pedrero, Tiago Lagarteira, Adelio M. Mendes
Summary: Different post-synthesis procedures were employed to enhance the performance of a Cu2O/ZnO catalyst for the electrochemical reduction of CO2. The procedures successfully controlled important physicochemical parameters, such as oxidation state, number of oxygen defects, crystallite size, and the strength of the copper-zinc interaction. It was demonstrated that the H2/CO production ratio (syngas composition) can be tuned by applying in situ potential cycling treatments before the electrochemical measurements under the reaction conditions. For an applied potential of -1.0 VRHE, the H2/CO ratio values of 2.5, 5, and 0.7 were obtained using the same catalyst subjected to different post-synthesis procedures.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Engineering, Environmental
Hao Li, Zheng Yan, Min Li, Xiaoyan Wen, Shuo Deng, Sisi Liu, Wallace C. H. Choy, Lijie Li, Ming-Yu Li, Haifei Lu
Summary: The stability of perovskite solar cells (PSCs) is evaluated by studying the corrosion of an ultrathin silver electrode. It is found that light illumination and bias voltage can cause gradual oxidation of the silver film, leading to the generation of corrosive I2 gas. This study provides insights into the degradation mechanisms of PSCs and offers solutions for practical application.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Leisheng Jin, Zhuo Liu, Ai Guan, Zhen Wang, Rui Xue, Lijie Li
Summary: This paper proposes a highly efficient next generation reservoir computing (HENG-RC) paradigm that utilizes the principles of local states correlation and attention mechanism to process dynamic information generated by low dimensional and very large spatiotemporal chaotic systems (VLSCS). The study reveals that the trained model can be seen as a data-driven chaotic system. Additionally, a novel scheme of secure communication based on chaotic synchronization of two HENG-RC systems is designed, with enhanced security achieved by requiring knowledge of both the training signal and parameter settings.
IET COMMUNICATIONS
(2023)
Article
Optics
Dekun Yang, Zhidan Lei, Lijie Li, Wei Shen, Hui Li, Chengqun Gui, Yi Song
Summary: In this work, a three-dimensional hybrid nanostructure is proposed for high-density data storage using 3D lithography technology. By combining spectra with a broad wavelength range and a large angle range, and utilizing an artificial neural network to translate the spectra to data sequences, stable information readout and high readout accuracy are achieved. Furthermore, the potential for achieving higher storage densities is investigated.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Chemistry, Physical
Zijun Qi, Wei Shen, Rui Li, Xiang Sun, Lijie Li, Qijun Wang, Gai Wu, Kang Liang
Summary: This paper investigates the influence of nanopillars on the thermal boundary resistance of AlN/diamond interfaces using Non-equilibrium Molecular Dynamics method. The optimal AlN/diamond interface with nanopillar structures can reduce the thermal boundary resistance by 28%. The analysis of vibrational density of states reveals that the enhancement of AlN intermediate frequency phonons and the shift of diamond VDOS towards lower frequency contribute to the optimization of interfacial thermal transport.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Chun Zhao, Gangqiang Tang, Yujun Ji, Xin Zhao, Dong Mei, Lijie Li, Yanjie Wang
Summary: Ionic polymer actuators have received attention for their large strain under low-voltage stimulation. A key challenge is to develop electrodes with high conductivity and electrochemical performance. In this study, we propose an efficient method to prepare triple-layered multifunctional electrodes inspired by the structure of zoysia grass, resulting in improved actuation performance for the actuators.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Analytical
Gangqiang Tang, Chun Zhao, Xin Zhao, Dong Mei, Bo Li, Lijie Li, Yanjie Wang
Summary: Sustainable and environmentally friendly actuators powered by humidity, light, and magnetic fields are important for the application of microrobots. This paper proposes a facile and rapid method to prepare double-layer moisture-driven actuators by integrating a commercial humidity-sensitive Nafion TM membrane and polyimide (PI) tape. Programmable moisture-driven actuators have been developed based on this method, allowing for the realization of complex deformation modes and the development of soft robots imitating organisms like birds, vines, inchworms, and ants.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Nanoscience & Nanotechnology
Saqib Rafique, Matthew R. Burton, Nafiseh Badieh, Shahin Mehraban, Afshin Tarat, Guangzheng Zuo, Lijie Li, Yiqiang Zhan
Summary: Carbon-based materials, such as graphene, have limited applications in thermoelectric devices due to their high thermal conductivity. A novel synthesis technique using multiwalled carbon nanotubes and carbon black fillers is developed to reduce the thermal conductivity of few layered graphene while maintaining high electrical conductivity. The resulting composites exhibit ultra-low thermal conductivity and improved thermoelectric performance.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Ruhao Liu, Yaming Zhang, Yuankai Zhou, Jiaheng Nie, Lijie Li, Yan Zhang
Summary: This study investigates the properties of spin and valley transport in piezotronics valley transistors based on a normal/ferromagnetic/normal (NFN) structure of monolayer transition metal dichalcogenides (TMDs). The Rabi frequency can reach up to 4200 MHz using the piezotronics effect, which is about 1000 times higher than that of ZnO/CdO quantum well devices. The strain-induced strong polarization allows for control of the spin and valley transport properties in piezo-phototronic transistors. The theoretical calculations include the spin and valley conductance as well as the spin and valley polarizability. The strong polarization can be used to manipulate the valley qubit, thereby paving a new way for quantum computing applications based on piezotronic valley transistors.
Article
Chemistry, Multidisciplinary
Hongyuan Cui, Chenshan Gao, Pengwei Wang, Lijie Li, Huaiyu Ye, Zhongquan Wen, Yufei Liu
Summary: The adsorption properties of Cu, Ag, Zn, and Cd-modified SnP3 monolayers for H2S were investigated using density functional theory. The results showed that Cu and Zn-modified SnP3 exhibited better adsorption capacity for H2S compared to Ag and Cd-modified SnP3. Cu-modified SnP3 showed chemisorption for H2S, while Zn-modified SnP3 exhibited strong physisorption and had a fast recovery time.
Review
Energy & Fuels
Jiaheng Nie, Yaming Zhang, Jizheng Wang, Lijie Li, Yan Zhang
Summary: Polyvinylidene difluoride (PVDF)-based perovskite solar cells (PSCs) have achieved continuous improvements in efficiency up to 24.23%. These polarization-enhanced solar cells offer a simpler strategy to achieve stable polarization and increase efficiency.
Article
Computer Science, Interdisciplinary Applications
Leisheng Jin, Zhuo Liu, Lijie Li
Summary: In this work, a machine learning based approach called Runge-Kutta guided next-generation reservoir computing (RKNG-RC) is proposed, which can process data generated by chaotic and experimental systems with outstanding prediction ability. Moreover, the RKNG-RC method has the distinctive interpretability to deduce the governing ordinary differential equation from the trained weights.
JOURNAL OF INDUSTRIAL INFORMATION INTEGRATION
(2023)
Article
Materials Science, Multidisciplinary
Meihua Chen, Xin Cui, Yaming Zhang, Pingjin Zou, Ling Xiao, Mengzhe Kang, Junyang Chen, Junjin Ren, Zengyi Fang, Lijie Li, Jinyi Lang, Yan Zhang, Zhong Lin Wang
Summary: Wearable and implantable friction-based nanogenerators (TENGs) can convert human body movements into electricity. The self-generated dynamic electric field of TENGs offers a key technology for precision medicine, inhibiting the proliferation of cancer cells and reducing damage to healthy tissues.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Yaming Zhang, Jiaheng Nie, Baohua Teng, Lijie Li, Yan Zhang
Summary: This article introduces the use of strain-induced polarization to enhance the performance of piezoelectric solar cells. Nonuniform strain can effectively increase the piezoelectric polarization, improving the power-conversion efficiency (PCE) of piezoelectric solar cells. By strain-induced polarization, the PCEs of solar cells based on 2D WS2 and MoS2 are boosted to 48.1% and 42.8%, respectively. Strain-induced polarization not only increases the built-in field, but also simplifies bandgap gradients through inexpensive strain regulation. In this article, a tandem and parallel piezo-phototronic solar cell with single-type 2D piezoelectric semiconductor materials is proposed, providing a novel way to develop an ultrahigh efficiency 2D material solar cell.
Article
Chemistry, Physical
Yaming Zhang, Jiaheng Nie, Ruhao Liu, Baohua Teng, Lijie Li, Yan Zhang
Summary: Piezotronics is an emerging field involving high-performance piezoelectric semiconductor devices. This study proposes a theory of quantum piezotronics under nonuniform strain and demonstrates its impact on the performance of piezoelectric devices through experimental examples.
Article
Energy & Fuels
Norshahirah Mohamad Saidi, Artiqah Khairudin, Lijie Li, Muhammad Amirul Aizat Mohd Abdah, Ong Gerard, Yee Seng Tan, Mohammad Khalid, Fayaz Khan, Muhammad Norhaffis Mustafa, Arshid Numan
Summary: This article compares the performance of nickel phosphate synthesized by sonochemical and microwave-assisted hydrothermal reaction methods for supercapattery. It is found that the nanoparticles of nickel phosphate synthesized by the MW method are smaller and amorphous, providing more redox-active sites. The NiPO4-MWB sample prepared by the MW method shows the highest specific capacity at a current density of 1 A g-1 and retains 99.42% of its capacity after 5000 cycles.
JOURNAL OF ENERGY STORAGE
(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)
