Article
Nanoscience & Nanotechnology
Taekham Kim, Doohyeok Lim, Jaemin Son, Kyoungah Cho, Sangsig Kim
Summary: This study demonstrates reconfigurable n- and p-channel operations in a tri-top-gate field-effect transistor made of a p(+)-i-n(+) silicon nanowire. The device features simple design and high performance, allowing control of both operation modes on the same device.
Article
Physics, Applied
Yuh-Chen Lin, G. Bruce Rayner, Jorge Cardenas, Aaron D. Franklin
Summary: In this study, NC-FETs based on 2D MoS2 using CMOS-compatible ferroelectric HfZrO2 were experimentally studied, showing significant improvement in subthreshold switching at shorter channel lengths, down to 20 nm. The analysis of the capacitive network indicated that the NC effect is enhanced by a larger magnitude of polarization in the ferroelectric, benefiting gate control and channel-length scaling.
APPLIED PHYSICS LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Nikhil Tiwale, Satyaprasad P. Senanayak, Juan Rubio-Lara, Abhinav Prasad, Atif Aziz, Yury Alaverdyan, Mark E. Welland
Summary: This study presents a novel approach of direct-write electron-beam lithography (DW-EBL) to fabricate micron/nano-field-effect transistors (FETs) using ZnO solution precursors as negative tone resists. It demonstrates a significant improvement in the mobility and current density of ZnO FETs as the precursor pattern width decreases. The findings highlight the influence of pre-decomposition nanoscale precursor patterning on the grain morphology evolution in ZnO, enabling opportunities for large-scale integration and miniaturization of high-performance nanoscale oxide FETs.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Amritanand Sebastian, Sarbashis Das, Saptarshi Das
Summary: This research explores the use of subthreshold Boltzmann transport and specific hardware acceleration for optimization calculations of Ising spin systems, demonstrating a search acceleration of up to 800x with SA compared to exhaustive search methods.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Abhinav Chandresh, Christof Woell, Lars Heinke
Summary: This study demonstrates the precise deposition of nanoporous metal-organic frameworks on graphene, yielding bilayers with excellent specificity and high sensitivity. This approach can solve the low specificity issue of graphene in sensor applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Soojin Kim, Chulmin Kim, Young Hyun Hwang, Seungwon Lee, Minjung Choi, Byeong-Kwon Ju
Summary: Researchers introduced a stable and site-selective method for surface doping of tungsten diselenide devices, successfully inducing a carrier-type transition effect and recovering electrical properties. The recovered device showed no additional defects on the interface after exposure to low-vacuum conditions for 10 days.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Aristide Djoulde, Tebogo Lucky Mamela, Weilin Su, Lingli Kong, Hongzhou Wang, Jinbo Chen, Jinjun Rao, Pengfei Zhao, Li Ma, Jun Yang, Zhiming Wang, Mei Liu
Summary: This study demonstrates a low-cost and feasible method for electrical characterization of semiconducting oxide nanowires. By utilizing tungsten nanoprobes and a nanomanipulation system, stable contacts were established for direct electrical measurements on individual and overlapped zinc oxide nanowires. The results provide valuable information on the intrinsic electrical properties of metal/semiconductor interfaces, with potential applications in nanoelectronic devices.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Ranveer Singh, Heecheol Shin, Sanghee Nah, Ji-Yong Park, Hyungtak Seo
Summary: Researchers fabricated a ZnO/Al2O3/silver-nanowires heterostructure and studied the tunneling dynamics of hot carriers via the Al2O3 layer, as well as observed broad light absorption in the heterostructure. This study provides an effective approach for improving the hot carrier injection efficiency in wide band gap materials for use in photovoltaics and photocatalysis applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Seong Kwang Kim, Hyeong-Rak Lim, Jaejoong Jeong, Seung Woo Lee, Ho Jin Jeong, Juhyuk Park, Joon Pyo Kim, Jaeyong Jeong, Bong Ho Kim, Seung-Yeop Ahn, Youngkeun Park, Dae-Myoung Geum, Younghyun Kim, Yongku Baek, Byung Jin Cho, Sanghyeon Kim
Summary: This study reports on the fabrication and characterization of 3-D sequential complementary fieldeffect-transistors (CFETs) using the direct wafer bonding (DWB) technology and a low-temperature process for monolithic 3-D (M3D) integration. The research demonstrates the highest mobility among Ge p-FETs with similar channel thicknesses using a thin Ge (110) nanosheet (NS) channel p-FET with low effective hole mass.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Review
Physics, Applied
Hiroshi Kawarada
Summary: Diamond can be doped to become a p-type or n-type semiconductor. A p-FET based on diamond shows similar performance to other wide bandgap semiconductor n-FETs. The formation of a two-dimensional hole gas (2DHG) on the diamond surface is explained by a negatively charged surface model. Recent advances in 2DHG FETs are discussed, along with proposals for high-voltage circuits combining diamond p-FETs with n-FETs.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Shuai Yue, Lu Chen, Manke Zhang, Zhe Liu, Tao Chen, Mingzheng Xie, Zhen Cao, Weihua Han
Summary: This study used an electrostatic field to inhibit the recombination of photo-carriers in photocatalysts, leading to improved photocatalytic performance of BiVO4 nanowires.
NANO-MICRO LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Binxi Liang, Anjian Wang, Jian Zhou, Shihao Ju, Jian Chen, Kenji Watanabe, Takashi Taniguchi, Yi Shi, Songlin Li
Summary: Device passivation through ultraclean hexagonal BN encapsulation is an effective method to construct high-quality atomically thin semiconductor devices. This study successfully integrates lithography-defined contacts into BN-encapsulated 2D FETs, resulting in device quality comparable to pure dry transfer processing. The electronic characterization shows low scanning hysteresis, low density of interfacial charged impurities, and high charge mobility in WSe2 and MoS2 channels.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Computer Science, Information Systems
Keon Joo Park, Chae Won Kim, Min Jae Sung, Jiyoul Lee, Young Tea Chun
Summary: In this paper, a simple patterning technique using a polydimethylsiloxane (PDMS) mold to fabricate highly aligned nanowires of a diketopyrrolopyrrole (DPP)-based donor-acceptor-type copolymer for high-performance field effect transistors is reported. The morphology of the patterns was controlled by adjusting the concentration of the copolymer solution. The resulting nanowires showed significantly improved charge carrier mobility compared to spin-coated film-based devices.
Article
Chemistry, Multidisciplinary
Jiamin Sun, Xinming Zhuang, Yibo Fan, Shuai Guo, Zichao Cheng, Dong Liu, Yanxue Yin, Yufeng Tian, Zhiyong Pang, Zhipeng Wei, Xiufeng Song, Lei Liao, Feng Chen, Johnny C. Ho, Zai-xing Yang
Summary: In this research, an efficient strategy using metal-semiconductor junction to enhance the hole mobility of p-channel devices was proposed. By depositing CMOS-compatible metals on the surface of GaSb nanowire field-effect transistors, the peak hole mobility was increased threefold. This approach was also effective for other p-channel devices like GaAs and WSe2, resulting in improved performance for CMOS inverters.
Article
Multidisciplinary Sciences
Md Akram Ahmad, Jitendra Kumar
Summary: This study examines the analog/RF performance characteristics of graphene nanoribbon field-effect transistors using a novel technique called underlap engineering. The study determines the optimal underlap length for the devices and analyzes the impact of underlap engineering on performance metrics. The results demonstrate superior performance of the devices incorporating the underlap mechanism.
SCIENTIFIC REPORTS
(2023)
Review
Polymer Science
Jianwen Chen, Yutian Zhu, Jinrui Huang, Jiaoxia Zhang, Duo Pan, Juying Zhou, Jong E. Ryu, Ahmad Umar, Zhanhu Guo
Summary: Conductive polymer composites (CPCs) have good processability and various functionalities, with electrical resistance dominated by conductive networks. Utilizing stimulus-response behavior of these networks, CPCs can be used to design sensitive sensors to monitor environmental conditions, showing potential for versatile sensor applications.
Article
Chemistry, Physical
Surabhi Mishra, Pravin Kumar Singh, Rajesh K. Yadav, Ahmad Umar, Pooja Lohia, D. K. Dwivedi
Summary: This paper investigates the linear and nonlinear properties of Sb-doped Ge-Se-Te glasses for optoelectronic applications, including refractive index, optical conductivity, dielectric constants, and energy losses. Various models and formulas were used to analyze the experimental data and provide a comprehensive understanding of the samples.
Article
Chemistry, Analytical
Ahmad Umar, M. Shaheer Akhtar, Sadia Ameen, M. Imran, Rajesh Kumar, Yao Wang, Ahmed A. Ibrahim, H. Albargi, Mohammed Jalalah, Mabkhoot A. Alsaiari, M. S. Al-Assiri
Summary: This work describes the preparation of spinel NiMn2O4 nanodisks decorated reduced graphene oxide (rGO) via low-temperature colloidal solution method and analyzes their performances as electro-active electrode for electrochemical sensor and supercapacitors. The results showed high sensitivity and specific capacitance of the NiMn2O4/rGO composite, making it a promising electrode material for high-performance sensing and supercapacitors.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Jincheng Fan, Hao Li, Huiyun Hu, Yue Niu, Ruiting Hao, Ahmad Umar, M. S. Al-Assiri, Mabkhoot A. Alsaiari, Yao Wang
Summary: In this study, a room temperature formaldehyde sensor was developed using ZnO nanoparticles and graphene material, capable of detecting as low as 5 ppm of HCHO. The excellent gas sensing performances, including high selectivity and reversibility, were attributed to the synergistic effects of 5-aminonaphthalene-1-sulfonic acid (ANS) and ZnO nanoparticles, with ANS facilitating charge transfer for lower energy barrier detection.
MICROCHEMICAL JOURNAL
(2021)
Article
Materials Science, Ceramics
Ahmad Umar, Ahmed A. Ibrahim, H. Y. Ammar, Umesh T. Nakate, Hasan B. Albargi, Y. B. Hahn
Summary: The synthesis, characterizations and gas sensor application of nano-textured urchin like CuO hollow microspheres were reported. The fabricated CuO sensor device showed elevated response towards ethanol with high selectivity after optimization of operating temperature and concentration. The developed gas sensor devices demonstrated outstanding selectivity towards ethanol gas and the ethanol sensing mechanism was elucidated using density functional theory computational quantum modeling.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Ahmad Umar, Ahmed A. Ibrahim, Umesh T. Nakate, Hasan Albargi, Mabkhoot A. Alsaiari, Faheem Ahmed, Fahad A. Alharthi, Abdulaziz Ali Alghamdi, Nabil Al-Zaqri
Summary: The ethanol sensing properties of nanocrystalline copper oxide (CuO) nanoplates were studied and a sensor based on CuO nanoplates showed a high ethanol response at 250 degrees C. The sensor exhibited high selectivity in the presence of various gases such as NO2, CO2, CH4, and H-2. The CuO nanoplates based gas sensor was also tested for transient ethanol response and stability.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Environmental Sciences
Prachi Chaudhary, Vikas Beniwal, Ahmad Umar, Raman Kumar, Priyanka Sharma, Anil Kumar, Yas Al-Hadeethi, Vinod Chhokar
Summary: Industrial wastes, such as tannery wastes, contain bacteria resistant to Chromium (Cr) and tannic acid (TA), which can effectively remove these pollutants through co-culture. Optimization of physio-chemical parameters enhances the efficiency of co-culture system, showing potential for degradation of other heavy metals by the isolated bacteria.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Chemistry, Physical
Xiaojing Lin, Mingxuan Sun, Bowen Gao, Wen Ding, Zihan Zhang, Sambandam Anandan, Ahmad Umar
Summary: A series of mixed-phases TiO2 were fabricated using a mild hydrothermal process, resulting in nanocrystals with different combinations of anatase, rutile, and brookite phases. While the triphase TiO2 showed the longest optical edge in UV-vis absorption spectroscopy, the diphase TiO2 exhibited higher degradation ratio of levofloxacin. This study provides insights into regulating the phase ratio of TiO2 for environmental remediation applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Ahmad Umar, Ahmed A. Ibrahim, Rajesh Kumar, Hasan Albargi, Mabkhoot A. Alsaiari, Faheem Ahmed
Summary: The study investigated the synthesis, characterization, and ethanol gas sensing properties of hematite iron oxide microstructures. The fabricated sensor demonstrated a high response to ethanol gas compared to CO and H-2 gases, with a proposed ethanol sensing mechanism.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Tahmineh Mahmoudi, Yousheng Wang, Yoon-Bong Hahn
Summary: This study proposes an innovative approach to enhance the stability and performance of perovskite solar cells by utilizing functional composites, achieving high power conversion efficiency, photocurrent density, and long-term stability.
Review
Chemistry, Medicinal
Nuha Al-Harbi, Hiba Mohammed, Yas Al-Hadeethi, Ahmed Samir Bakry, Ahmad Umar, Mahmoud Ali Hussein, Mona Aly Abbassy, Karthik Gurunath Vaidya, Ghada Al Berakdar, Elmoiz Merghni Mkawi, Manasa Nune
Summary: Regenerative medicine aims to improve tissue repair and restoration processes using bioactive materials like bioactive glass, which is mainly used for bone tissue regeneration. The bioactivity of bioactive glass depends on compositional ratio, and manipulating the content ratio can develop other types of bioactive glasses with controllable chemical durability and affinity with bone.
Article
Materials Science, Ceramics
Ramesh Kumar, Ahmad Umar, Rajesh Kumar, M. S. Chauhan, Yas Al-Hadeethi
Summary: ZnO-SnO2 nanocubes are used as efficient materials for detecting p-nitrophenol and quickly degrading dyes, with a low detection limit and high selectivity.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
N. Sabry, H. Y. Zahran, El Sayed Yousef, H. Algarni, Ahmad Umar, Hasan B. Albargi, I. S. Yahia
Summary: This study focuses on investigating the gamma-ray interaction parameters of three different semiconductor compounds, with Cu2MnGeSe4 and Cu2MnGeTe4 showing higher MAC and LAC values compared to standard glass materials. Additionally, these semiconductor compounds have better neutron protection features and higher sensing abilities for gamma-rays and neutrons than traditional glassy materials.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Biotechnology & Applied Microbiology
Rohit Sharma, Teenu Jasrotia, Rajeev Kumar, Raman Kumar, Ahmad Umar, Fahad A. Alharthi, Abdulaziz Ali Alghamdi, Nabil Al-Zaqri
Summary: This study aimed to develop a consortium of heavy metal resistant bacteria and found that two strains Bacillus cereus and Bacillus pumilus showed remarkable removal ability of Pb2+ and Ni2+ ions from wastewater samples. The mechanism of heavy metals removal was also investigated, providing important insights for future research in this area.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Physical
Rahul S. Salunke, Yogesh T. Nakate, Ahmad Umar, Umesh T. Nakate, Rafiq Ahmad, Dhammanand J. Shirale
Summary: The sensor electrode with gold nanoparticles (AuNPs) functionalized single polypyrrole nanowire (PpyNW) showed high sensitivity and an ultra-low detection limit during arsenic (III) detection in solution.
SURFACES AND INTERFACES
(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)
