Article
Engineering, Electrical & Electronic
Maryam Ghodrati, Ali Mir, Ali Farmani
Summary: Label-free monitoring of biomaterials using a DL-TCNTFET biosensor has been investigated for its sensitivity and performance. By adjusting parameters such as dielectric constant, improvements in ambipolar behavior and reduction in OFF current can be achieved, providing a new direction for label-free monitoring of biomaterials.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Jovian Delaforce, Masiar Sistani, Roman B. G. Kramer, Minh A. Luong, Nicolas Roch, Walter M. Weber, Martien den Hertog, Eric Robin, Cecile Naud, Alois Lugstein, Olivier Buisson
Summary: Superconductor-semiconductor-superconductor heterostructures with monolithic Al-Ge-Al nanowire featuring high junction transparency Josephson field-effect transistors have been demonstrated in this study to investigate low-temperature transport properties of intrinsic Ge quantum dots, showing tunability of device performance from insulating to supercurrent regimes. This provides a promising architecture for hybrid superconductor-semiconductor devices for the study of Majorana zero modes and components of quantum computing.
ADVANCED MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Hamilton Carrillo-Nunez, Cristina Medina-Bailon, Vihar P. Georgiev, Asen Asenov
Summary: In this study, full-band quantum transport simulations were conducted on a device with hole-phonon interactions, consisting of two gates-all-around and a p-type Si nanowire channel. The self-energy expression for hole-phonon interaction within the mode-space representation is introduced using the six-band k·p method.
Article
Quantum Science & Technology
Basudev Nag Chowdhury, Sanatan Chattopadhyay
Summary: This study investigates the performance of a dual-gate GaAs-nanowire field-effect transistor (FET) as a charge-qubit device operating at room temperature. By applying appropriate biases, two voltage tunable quantum dots are created within the nanowire channel, allowing for charge-qubit operation at room temperature. The associated electron transport is modeled using the nonequilibrium Green's function formalism. Experimental results show a coherent oscillation frequency of approximately 25 MHz and a characteristic decay time of approximately 70 ns for the qubit. These findings suggest that the dual gate nanowire FET holds promise for charge-qubit operation at room temperature.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Lester U. Vinzons, Akhilesh Kumar Gupta, Tung-Yen Lai, Shu-Ping Lin
Summary: Cell-coupled silicon nanowire field-effect transistor devices were used to study the impedance spectra of cells. Live observation of cells on the actual chips before impedance measurement revealed significant changes in the lower frequency range. Impedance spectra showed distinct variations after cells covered the surface of SiNW.
Article
Nanoscience & Nanotechnology
Young-Soo Park, Doohyeok Lim, Jaemin Son, Juhee Jeon, Kyoungah Cho, Sangsig Kim
Summary: This paper proposes inverting logic-in-memory cells with silicon nanowire feedback field-effect transistors, demonstrating steep switching and holding characteristics. The cells exhibit nanosecond operating speed, ultra-high voltage gain, and longer retention time compared to conventional DRAM. The disturbance characteristics of half-selected cells within the inverting LIM array confirm the proper functioning of the random access memory array.
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.
Review
Physics, Multidisciplinary
M. Ridley, N. W. Talarico, D. Karlsson, N. Lo Gullo, R. Tuovinen
Summary: The non-equilibrium Green's function (NEGF) formalism is one of the most versatile theoretical approaches to studying time-dependent correlated quantum transport in nano-systems, capable of treating inter-particle interactions, external drives and/or perturbations, and coupling to baths with a (piece-wise) continuum set of degrees of freedom.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Chemistry, Multidisciplinary
Wentao Xu, Lihua Wang, David ChangMo Yang, Amir Hajibabaei, Yeongjun Lee, Cheolmin Park, Tae-Woo Lee, Kwang S. Kim
Summary: The study reports the prediction and observation of supra-binary polarization in a ferroelectric nanowire covered with a semicylindrical gate. Different polarization states can be achieved by controlling the external electric field, leading to exotic current-voltage hysteresis in the ferroelectric-graphene nanoribbon transistor. This discovery suggests new operating mechanisms for ferroelectric devices, allowing for both quaternary-digit information manipulation and traditional bit manipulation in data storage.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xinming Zhuang, Zixu Sa, Jie Zhang, Mingxu Wang, Mingsheng Xu, Fengjing Liu, Kepeng Song, Tao He, Feng Chen, Zai-xing Yang
Summary: High-performance GaSb nanowire field-effect transistors (FETs) with excellent bias-stress stability and synaptic behaviors are achieved by utilizing native GaOx shells through in-situ thermal annealing. The native oxide shell provides enhanced stability and charge retention capability for synaptic behaviors.
Article
Multidisciplinary Sciences
Qitao Hu, Si Chen, Paul Solomon, Zhen Zhang
Summary: In this study, sub-10-nm electrical double layer-gated silicon nanowire field-effect transistors (SiNWFETs) are used to directly detect the events of capturing and emitting a single hydrogen ion (H+) at the solid/liquid interface. The ability to achieve ion detection with single charge resolution is demonstrated, along with a systematic investigation of the kinetics of single H+-DB interactions. The SiNWFETs show unprecedented capability for electrical sensing applications, especially in studying the physics of solid/liquid interfacial interactions at the single charge level.
Review
Chemistry, Analytical
Huiping Li, Dujuan Li, Huiyi Chen, Xiaojie Yue, Kai Fan, Linxi Dong, Gaofeng Wang
Summary: As a new type of one-dimensional semiconductor nanometer material, silicon nanowires (SiNWs) have promising applications in the field of biomedical sensing. SiNWs possess excellent electronic properties that can enhance the detection sensitivity of biosensors. SiNWs combined with field effect transistors (FETs) form a special biosensor with high sensitivity and target selectivity in real-time and label-free. SiNW-FETs have gained more attention in biomedical detection. This review critically examines the progress of SiNW-FETs, focusing on reversible surface modification methods. Additionally, it summarizes the applications of SiNW-FETs in DNA, protein, and microbial detection, while discussing their working principle and technical approaches. The review provides extensive discussion for studying the challenges in the future development of SiNW-FETs.
Article
Engineering, Electrical & Electronic
Preslav Aleksandrov, Ali Rezaei, Tapas Dutta, Nikolas Xeni, Asen Asenov, Vihar Georgiev
Summary: This work presents a new simulation approach called ML-NEGF that combines machine learning and device modeling simulations. The method utilizes quantum mechanical nonequilibrium Green's function approach for device simulations and extends a convolutional generative network for machine learning. The results demonstrate faster convergence speed of the ML-NEGF method compared to the standard NEGF approach, achieving an average speedup of 60% while maintaining accuracy.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Nanoscience & Nanotechnology
Shun Xu, Ruijin Hu, Junzhuan Wang, Zheyang Li, Jun Xu, Kunji Chen, Linwei Yu
Summary: The study demonstrates a high-density catalytic growth of orderly ultrathin silicon nanowires using a terrace-confined strategy, achieving nanoscale dimensions for the SiNW array and maintaining stable growth over complex contours. Prototype SiNW field effect transistors show high performance with a high current ratio, low leakage current, and steep subthreshold swing, highlighting the potential for scalable SiNW logic and sensor applications.
Article
Engineering, Electrical & Electronic
Takashi Kato, Hiroki Mori, Hiroyuki Yoshinaga, Satofumi Souma
Summary: By introducing a specific active region structure, the optical dipole matrix element < z > of the QCL is increased, leading to improved optical gain. A Fabry-Perot GaInAs/AlInAs QCL operating at a wavelength of around 7.5 μm demonstrated continuous operation up to a temperature of 378 K.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2021)
Article
Computer Science, Interdisciplinary Applications
Vitaly Chernik, Pavel Buklemishev
Summary: The paper introduces a simple 2D model for describing the cell motility on a homogeneous isotropic surface. The model incorporates the dynamics of complex actomyosin liquid, which affects the boundary dynamics and cell motility. It consists of a system of equations with a free boundary domain and includes a non-local term. The numerical solution of this model is presented in this work.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Hasan Karjoun, Abdelaziz Beljadid
Summary: In this study, we developed a numerical model based on the depth-averaged shallow water equations to simulate flows through vegetation field. The model takes into account the drag and inertia forces induced by vegetation, using different formulations for the stem drag coefficient. Turbulence induced by vegetation is also considered through the addition of diffusion terms in the momentum equations. The proposed numerical model is validated through numerical simulations and shows good accuracy in simulating overland flows under vegetation effects.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Bechir Naffeti, Hamadi Ammar, Walid Ben Aribi
Summary: This paper proposes a branch and bound multidimensional Holder optimization method, which converts a multivariate objective function into a single variable function and minimizes it using an iterative optimization method. The method is applied to solve a parameters identification problem resulting from the increase in infections, providing information about the prevalence and infection force.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Heba F. Eid, Erik Cuevas, Romany F. Mansour
Summary: The proposed modified Bonobo optimizer algorithm dynamically adjusts the trajectory of each search agent to overcome the flaw of the original algorithm and improve the performance and solution quality by exploring and exploiting different regions of the solution space.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Farshid Mehrdoust, Idin Noorani, Juho Kanniainen
Summary: This paper proposes a Markov-switching model to evaluate the dynamics of commodity futures and spot prices, and introduces a hidden Markov chain to model the sudden jumps in commodity prices. The model is calibrated using the crude oil spot price and estimation-maximization algorithm. The study also evaluates European call options written on crude oil futures under the regime-switching model and derives Greek formulas for risk assessment. The importance of this paper is rated at 8 out of 10.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Rupa Mishra, Tapas Kumar Saha
Summary: This paper presents a control scheme for distributed generation units to operate in stand-alone and grid-connected modes, with a smooth transition between the two. The control strategy includes predictive control for voltage and frequency regulation in stand-alone mode, and power control for symmetrical and unbalanced grid voltage conditions in grid-connected mode. The proposed control method improves power factor, reduces grid current harmonics, and eliminates grid frequency ripple.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Yu Wang, Yang Tian, Yida Guo, Haoping Wang
Summary: This paper proposes a multi-level control strategy for lower limb patient-exoskeleton coupling system (LLPECS) in rehabilitation training based on active torque. The controller consists of three sub-controllers: gait adjustment layer, interaction torque design layer, and trajectory tracking layer. The effectiveness of the proposed control strategy is demonstrated through co-simulations in the SimMechanics environment using an exoskeleton virtual prototype developed in SolidWorks.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Takuji Arai, Yuto Imai
Summary: The Barndorff-Nielsen and Shephard model is a jump-type stochastic volatility model, and this paper proposes two simulation methods for computing option prices under a representative martingale measure. The performance of these methods is evaluated through numerical experiments.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Wanai Li
Summary: This paper proposes a new framework that combines quadrature-based and quadrature-free discontinuous Galerkin methods and applies them to triangular and tetrahedral grids. Four different DG schemes are derived by choosing specific test functions and collocation points, improving computational efficiency and ease of code implementation.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Xiyuan Chen, Qiubao Wang
Summary: This paper introduces a technique that combines dynamical mechanisms and machine learning to reduce dimensionality in high-dimensional complex systems. The method utilizes Hopf bifurcation theory to establish a model paradigm and utilizes machine learning to train location parameters. The effectiveness and robustness of the proposed method are tested and validated through experiments and simulations.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Muhammad Farman, Aqeel Ahmad, Anum Zehra, Kottakkaran Sooppy Nisar, Evren Hincal, Ali Akgul
Summary: Diabetes is a significant public health issue that affects millions of people worldwide. This study proposes a mathematical model to understand the mechanisms of glucose homeostasis, providing valuable insights for diabetes management. The model incorporates fractional operators and analyzes the impact of a new wave of dynamical transmission on equilibrium points, offering a comprehensive understanding of glucose homeostasis.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Gholamreza Shobeyri
Summary: This study introduces two improved Laplacian models for more accurate simulation of free surface flows in the context of the MPS method. The higher accuracy of these models compared to the traditional methods is verified through solving 2D Poisson equations and solving three benchmark free surface flow problems. These models can also resolve the issue of wave damping in the original MPS computations.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Qiang Li, Jinling Liang, Weiqiang Gong, Kai Wang, Jinling Wang
Summary: This paper addresses the problem of nonfragile state estimation for semi-Markovian switching complex-valued networks with time-varying delay. By constructing an event-triggered generator and solving matrix inequalities, less conservative criteria are obtained, and the gains of the nonfragile estimator are explicitly designed. A numerical example is provided to demonstrate the effectiveness of the proposed estimation scheme.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
Gengen Zhang, Jingyu Li, Qiong-Ao Huang
Summary: In this paper, a novel class of unconditionally energy stable schemes are constructed for solving gradient flow models by combining the relaxed scalar auxiliary variable (SAV) approach with the linear multistep technique. The proposed schemes achieve second-order temporal accuracy and strictly unconditional energy stability.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)
Article
Computer Science, Interdisciplinary Applications
S. Clain, J. Figueiredo
Summary: This study proposes a detailed construction of a very high-order polynomial representation and introduces a functional to assess the quality of the reconstruction. Several optimization techniques are implemented and their advantages in terms of accuracy and stability are demonstrated.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2024)