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AFM based nanomanipulation is still hindered by large spatial uncertainties encountered in tip positioning caused by PZT nonlinearity and thermal drift. In this paper, a landmark based positioning method is proposed to solve these problems. Its pivotal idea is that the tip position is described in a feature based landmark coordinate instead of length based Descartes coordinate. During manipulation,...
One of the main roadblocks to Atomic Force Microscope (AFM) based nanomanipulation is lack of real time visual feedback. Although the model based visual feedback can partly solve this problem, its unguaranteed reliability due to the inaccurate models in nano-environment still limits the efficiency of AFM based nanomanipulation. This paper introduce a Realtime Fault Detection and Correction (RFDC)...
A novel method based on vibration-mode of the atomic force microscope (AFM) for nanoimaging and nanomanipulation is introduced in this paper. With this approach, the amplitude of OMSPV (opto-electronic measurement signal of probe vibration) can be used as a feedback signal to detect and control the operation state under vibration-mode. By controlling the amplitude of AFM probe, the tip-sample interaction...
Carbon nanotube (CNT) is an ideal candidate for future nanoelectronics because of its small diameter, high current-carrying capability, and high conductance in a one-dimensional nanoscale channel. The most challenging part in fabricating nanosystems could be the formation of CNT connections. Existing techniques in forming CNT connections are suffered from problems in forming a single CNT connection...
For AFM based robotic nanomanipulation system without displacement sensor, one of the key technical problems is to realize high accurate positioning of the AFM probe. To solve the problem, based on the hysteresis and nonlinear characteristics analysis of AFM PZT actuator, a new actuating method called "actuating method based on reappearing the scanning trajectory" is presented to actuate...
Carbon nanotubes (CNTs) offer great potential for the fabrication of nanosystems or nanodevice due to the unique electronic transport properties of the material. However, the most challenging thing to the realization of practical CNT devices could be the formation of reliable and reproducible CNT to metallic contacts. In this work, by using an atomic force microscope (AFM) based nanomanipulate robot,...
This paper describes the structural and thermal modeling of a thermally actuated polymer micro robotic gripper. The basic structure for the gripper is a trimorph thermal actuator with a platinum metal heater encapsulated by parylene C polymer layers. Due to the large difference of thermal expansion coefficients between different structural layers, the actuator can be actuated with much larger deflections...
Atomic force microscope (AFM) has been proven to be a useful tool to characterize and change the sample surface down to the nanometer scale. However, in the AFM based nano manipulation, the main problem is the lack of real-time sensory feedback for an operator, which makes the manipulation almost in the dark and inefficient. For solving this problem, the AFM probe micro cantilever-tip is used not...
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