Conformal mapping for multiple terminals

Wang, Weimin; Ma, Wenying; Wang, Qiang; Ren, Hao

doi:10.1038/srep36918

Cited by 10 publications

(5 citation statements)

References 40 publications

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“…Based on a forward SC transformation, the upper half-plane of W-plane can then be transformed into a folded rectangle in another complex plane, namely, Q-plane, as shown in Fig. 2 e 30 . The dashed lines EE’ and E’F overlap, although they are drawn separately to show that the structure is closed.…”

Section: Resultsmentioning

confidence: 99%

Electrostatic repulsive out-of-plane actuator using conductive substrate

Wang

Ren

et al. 2016

Sci Rep

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A pseudo-three-layer electrostatic repulsive out-of-plane actuator is proposed. It combines the advantages of two-layer and three-layer repulsive actuators, i.e., fabrication requirements and fill factor. A theoretical model for the proposed actuator is developed and solved through the numerical calculation of Schwarz-Christoffel mapping. Theoretical and simulated results show that the pseudo-three-layer actuator offers higher performance than the two-layer and three-layer actuators with regard to the two most important characteristics of actuators, namely, driving force and theoretical stroke. Given that the pseudo-three-layer actuator structure is compatible with both the parallel-plate actuators and these two types of repulsive actuators, a 19-element two-layer repulsive actuated deformable mirror is operated in pseudo-three-layer electrical connection mode. Theoretical and experimental results demonstrate that the pseudo-three-layer mode produces a larger displacement of 0–4.5 μm for a dc driving voltage of 0–100 V, when compared with that in two-layer mode.

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Section: Resultsmentioning

confidence: 99%

Electrostatic repulsive out-of-plane actuator using conductive substrate

Wang

Ren

et al. 2016

Sci Rep

Self Cite

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“…Many methods have been developed to correct the band-gap problem at a moderate computational cost, such as the DFT + U method, [62] meta-GGA-type TB-mBJ potentials, [63] the generalized Delta self-consistent-field method, [64] modification of pseudopotentials, [65] the DFT-1/2 method, [66] and the Wannier-Koopman method. [67] These methods have shown great successes in predicting the band gaps, but may also suffer from certain disadvantages like the lack of self-consistency, the absence of a total-energy formalism, and the ad hoc nature. Careful tests are always recommended when they are applied to a particular material of interest.…”

Section: Band Gapmentioning

confidence: 99%

Advances and challenges in DFT-based energy materials design

Kang¹,

Xie²,

Wei³

2022

Chinese Phys. B

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The growing worldwide energy needs call for developing novel materials for energy applications. Ab initio density functional theory (DFT) calculations allow the understanding and prediction of material properties at the atomic scale, thus, play an important role on the energy materials design. Due to the fast progress of computer power and development of calculation methodologies, DFT-based calculations have greatly improved its predictive power, and are now leading to a paradigm shift towards theory-driven materials design. The aim of this perspective is to introduce the advances in DFT calculations which accelerate energy materials design. We first present state-of-the-art DFT methods for accurate simulation of various key properties of energy materials. Then we show examples of how these advances lead to the discovery of new energy materials for photovoltaic, photocatalytic, thermoelectric, and battery applications. The challenges and future research directions in computational design of energy materials are highlighted at the end.

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“…These forces are defined in the appendix. The capacitance ( ), and electric field ( ), of the coplanar capacitors are also obtained by finite element analysis modelling from equations (A5) -(A7) reported in the appendix [30]. The increase in the relative permittivity of the space between coplanar capacitor electrodes when a particle enters their active volume space depends on the ratio between the particle aerodynamic volume and the volume of the active volume space between the charged electrodes and on the relative permittivity of the particle.…”

Section: B Theorymentioning

confidence: 99%

Design, Modeling and Simulation of a Capacitive Size-Discriminating Particulate Matter Sensor for Personal Air Quality Monitoring

2020

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We applied the well-established thermophoretic effect to air quality monitoring. We developed a novel method for particulate matter distribution analysis in an in-flow capacitive detection device. The proposed Multiphysics model combines fluid dynamics of particulate matter influenced by thermophoresis with electric field variations in the active volume space of a charged coplanar interdigitated electrodes. The model allows to anticipate the effect of thermophoresis in separating particles of PM10 and PM2.5 size ranges into different streams from a single particleentrained flow and provides an estimated value of sensitivity for capacitive PM detection. The model is described through the Finite Element Method from the main equations to the simulation run using COMSOL Multiphysics and validated by comparing the results with literature. We obtained high sensor sensitivity of up to 0.48 zF/particle as far as 18 µm from coplanar electrode surface using the Computational Fluid Dynamics and Heat Transfer, Electrostatics and Particle tracing modules. We compare results of the simulations for different particle positions, electrode width and inter-electrode spacing, then we use the results to identify optimal design parameters for a novel architecture of a PM detection system with high sensitivity down to PM2.5 single particles and embedded particle size discrimination by using 10 µm electrode width and 1µm inter-electrode spacing.

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Conformal mapping for multiple terminals

Cited by 10 publications

References 40 publications

Electrostatic repulsive out-of-plane actuator using conductive substrate

Electrostatic repulsive out-of-plane actuator using conductive substrate

Advances and challenges in DFT-based energy materials design

Design, Modeling and Simulation of a Capacitive Size-Discriminating Particulate Matter Sensor for Personal Air Quality Monitoring

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