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nanoneedle
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Dynamic Modeling and Control of Atomic Force Microscope in Trolling Mode
, Ph.D. Dissertation Sharif University of Technology ; Vosoughi, Gholamreza (Supervisor) ; Nejat Pishkenari, Hossein (Supervisor)
Abstract
Trolling mode atomic force microscope (TR-AFM) significantly reduces the hydrodynamic drag generated during operation in liquid environments. This is achieved by utilizing a long nanoneedle and keeping the cantilever out of liquid. In this research, a continuous mathematical model is developed to study TR-AFM dynamics near a sample submerged in the liquid. Effects of cantilever torsion, nanoneedle flexibility, and liquid-nanoneedle interactions are considered in the model. The finite element model of the TR-AFM resonator considering the effects of fluid and nanoneedle flexibility is presented in this research, for the first time. The model is verified by ABAQUS software. The effect of...
Synthesis of One-Dimensional Nanoneedle-Like Arrays Hydroxyapatite for Bone Tissue Engineering Applications
, M.Sc. Thesis Sharif University of Technology ; Nemati, Ali (Supervisor) ; Khachatourian, Adrine Malek (Supervisor) ; Shokri, Babak (Co-Supervisor)
Abstract
Implant primary stability is a crucial component of implant survival. Primary mechanical stability is correlated with implant type, surgical technique, quantity and quality of bone at the recipient site. Since bone integration (BI) significance has been acknowledged, a variety of techniques have been developed to quicken BI and achieve faster fixation. Studies have shown that material type, and many surface properties, including as surface composition, roughness, topography, and energy, have a significant influence during the early stages of bone integration to the implant. In this work, we did synthesis one-dimensional nanoneedle-like arrays of hydroxyapatite using the injection method...