We analyze the confinement of electronic surface states in a model topological insulator nanowire. Spin-momentum locking reduces unwanted backscattering presence nonmagnetic disorder and is known to counteract localization for certain values magnetic flux threading wire. show that intentional can be induced range conditions nanowire constriction. propose geometry involves two constrictions thes...

Traditional MEMS filters use a comb drive structure that suffers from the pull-in instability, which places significant limitation on achievable signal-to-noise ratio of sensor. Because output signal capacitive sensor is linearly related to applied voltage, it desirable can withstand large voltages upwards 100 V. However, instability causes high destroy device and trade-off between performance ...

the effects of substituents on the symmetry and the nature of halogen bonds in [n∙∙∙x∙∙∙n]+-type systems are presented for the yc5h4n∙∙∙x∙∙∙nc5h5 (y = no2, cn, h, ch3, och3, oh, nh2, x = cl, br, i) complexes. some structural parameters, energy data and electronic properties were explored with the density functional theory (dft) calculations. in addition, electrostatic potentials were used in es...

Measuring the intensity of electric field atmosphere today has become a widespread task modern meteorology. After all, distribution local near surface earth is closely related to global thunderstorms and electrified clouds.
 The force characteristic an its intensity. change in atmospheric occurs relatively slowly, so electrostatic mill (EFM) are most widely used measure strength.
 Ele...

Abstract. This paper presents an overview and the current status of hosting the electrostatic plasma brake (EPB) experiment onboard the Finnish Aalto-1 satellite. The goal of the experiment is to demonstrate the use of an electrostatically charged tether for satellite attitude and orbital maneuvers. The plasma brake device is based on electrostatic solar sail concept, invented in Finnish Meteor...

This paper extends an earlier work that achieved resonance damping of a micro-machined directional microphone by embedding it in a compensated sigma-delta modulator (Wu et al., 2004). The goal was to combat the quadratic nonlinearity in the electrostatic force. The new developments in this paper include the use of a different capacitive device that is also biased to allow more effective readout...

This paper summarizes recent results obtained at TU Vienna in the field of thermal and free-carrier mapping of semiconductor devices using backside transient interferometric mapping (TIM) technique. The technique is based on measuring optical phase changes due to temperature and free carrier induced variations in semiconductor refractive index. Scanning transient heterodyne and 2D holographic i...

The current paper describes the design and fabrication of a micromachined electrostatically suspended gyroscope. Electrostatic levitation is employed to suspend the rotor, eliminating the mechanical bearing and thus friction effects between the rotor and the substrate, hence improving long-term stability. The rate of rotation can be measured by detecting the torque-induced displacement of the s...

This paper reviews the state of the art knowledge related to critical failure mechanisms in electrostatic microand nano-electromechanical systems (MEMS and NEMS) which are the dielectric charging and stiction. It describes also the recent employed nanoscale characterization techniques for these phenomena based on Kelvin probe force microscopy (KPFM) and force–distance curve measurements. The in...

Electrostatic comb-drive actuators have been developed and employed for many applications. However, side stability (side pull-in) limits the actuator stroke constraining its applications. Hence, extending the stable traveling range is an important issue for designing electrostatic comb-drive actuators. This study presents a novel cascade electrostatic comb-drive actuator. Instead of shifting th...