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The research on heart cells have attracted broad attention for the development of either heart disease therapy or muscle cell-based actuation for bio-syncretic robots. In order to study the mechanism and dynamics of beating activity of cardiomyocytes, many research methods have been proposed, such as the measurement of contractility and action potential of the cells. However, few of them has focused...
Atomic force microscopy (AFM) is originally used to observe the sample surface, and then extended to the area of nano-manipulation. It can be quite valuable in the further study of maneuvering nano-particles. Because of the influence of the tip morphology on the tip pushing direction, it is difficult to establish an effective operating model for stably manipulating nanoparticles with controllable...
Cells can be regarded as a complex network, which contains thousands of criss-cross signal pathways. The mechanical properties of a cell reflect the structure and composition of its cytoskeleton and are closely related to the cellular biological functions and physiological activities. In this study, we develop a dynamical model with cellular viscoelasticity properties as the system parameters to describe...
Control and actuation are the most important factors that determine the performance of traditional electromechanical robots. Bio-syncretic actuators are a potential trend for the next generation of robots to overcome the challenges in the control and actuation faced by the traditional robots and many novel bio-syncretic actuators have been reported with various biological entities. However, none of...
The ultrasonic vibration (UV)-assisted method, as an innovative nanomachining process, has competitive advantages compared to traditional atomic force microscopy (AFM) nanomachining methods. However, the mechanism of nanomachining by ultrasonic-assisted AFM is still unclear. Furthermore, the mathematical control model for the nanomachining process is still lacking. Therefore, the UV-assisted nanomachining...
Energy efficiency and intrinsic safety are two critical challenges faced by traditional robots based on electro-mechanical systems. Bio-syncretic actuators may provide clues to overcome these challenges. Cardiomyocytes are potential biological motors that can be used for bio-syncretic robots. Current researches on bio-hybrid robots mainly focus on the realization of bio-actuators at micro/nano-scale,...
The nonlinearities such as hysteresis and creep are the major factors inherent in PZT actuation that affect the tip positioning precision and manipulation performance of the AFM system. In this study, an extended PI model is generalized by introducing a creep model to the basic hysteretic operator of the PI model at the inflexion point of the hysteresis loop. Unified compensation for hysteresis and...
One of the prerequisites for AFM based nanomanipulation is that the position of the target nanoparticle can be stable controlled within a known area, while this prerequisite is still hindered by the uncertainties including the initial position of the nanoparticle and of the AFM tip, together with the uncertain forces from the substrate and so on. In this paper, a Stochastic Pushing (SP) model and...
In developing nano-devices and nano-structures, traditional methodologies on MEMS meet the difficulty from the scale restriction. With the strategy of objects assembly, using AFM to handle nano-rods and other nano-objects is considered as an important and high potential technology in constructing nano-structures. However most of AFM only has one tip as the end effector and cannot control both translational...
Nanomanipulation and nanoassembly using atom force microscopy (AFM) is a potential and promising technology for nanomanufacturing. Precise position of the tip of AFM is important to increase the accuracy and efficiency on fabricate complex nanostructures. However at the nano-scale, it is difficult to acquire the tip position expressed by the coordinate in real time due to PZT nonlinearity and thermal...
One of the major limitations for Atomic Force Microscopy (AFM) based nanoparticle pushing is that AFM only has one sharp tip as the end-effector. The interaction force between the nanoparticle and the tip is applied through a single point, which often leads the AFM tip to slip-away from the nanoparticle due to their small touch area. Then several minutes is needed to relocate the missed nanoparticle...
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