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Mechanical properties at nanoscale are crucial fators in the applications such as nanoscale interconnects and active components in electronic, optoelectronic, and electromechanical devices. Determination of the hardness of nanostructures, especially nano-thin-film, with regime from several to hundreds nanometers is a challenge. In this study, we proposed an ultrasonic vibration (USV)-assisted atomic...
Cellular mechanical properties as the main physical performance characteristics have been actively studied in the past years for the study of cytobiology and the development of medicine. In this study, by combining Hertz model, a novel strategy is proposed to simultaneously measure the cellular mechanical properties including cellular mass, elasticity and viscosity, based on the principle of forced...
This paper proposed a phase-closed-loop nanomachining control method to realize the directly control of machining depth based on ultrasonic vibration-assisted AFM. By using applied force to control the machining depth, conventional AFM machining approaches unable to machining a nanostructure with specified machined depth. With the proposed method, the vibration phase of micro-cantilever has a specific...
A friction modeling in zigzag and armchair lattice orientation of MoS2 has been demonstrated in this paper. Combing the assumption on the moving trajectories of the probe in both lattice orientations with two-dimension Tomlinson model, simulation of relationship between friction and orientation was smoothly performed with Matlab software. The lateral friction Microscopy(LFM) based experiment was conducted...
Nanoscale vibration, a critical nanomechanical property of cell membranes/walls, is a crucial aspect of cell physiology. However, limitations of current nanoscale vibration detecting methods remain the major obstacle for scientific study and cell vibration experiments. Due to the absence of effective method of feeble nanoscale vibration detecting, most sorts of quantitative and dynamic cell vibrations...
Ultrasonic vibration (UV)-assisted method, as an innovative nanomachining technology, has competitive advantages compared to traditional atomic force microscopy (AFM) nanomachining methods. However, the UV-assisted machining process by AFM is still an open loop control method for cutting depth and sample mechanical properties. Furthermore, the real-time material/interface sensing is still absent when...
The Compressive Sensing (CS) is a mean to solve simultaneously detection and estimation problems. It has been applied mainly in source Direction of Arrival (DOA) estimation problems where the amount of data to be handled is reasonably small. This is not the case in Knowledge-Aid Space Time Adaptive Processing (KA-STAP) which is widely used for ground clutter suppression and targets detection in airborne...
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