Print Email Facebook Twitter Modelling viscoelasticity using Multifrequency AFM Title Modelling viscoelasticity using Multifrequency AFM Author Penning, Casper (TU Delft Mechanical, Maritime and Materials Engineering) Contributor Alijani, F. (mentor) Chandrashekar, A. (mentor) Belardinelli, P. (mentor) Steeneken, P.G. (graduation committee) Langelaar, M. (graduation committee) Pahlavan, Lotfollah (graduation committee) Degree granting institution Delft University of Technology Programme Mechanical Engineering | Dynamics of Micro and Nano Systems Date 2020-01-17 Abstract Viscoelasticity is a material property that is relevant in a variety of nanoscale materials and interfaces in medicine and industry. Therefore, a method of mechanical quantification has become exceedingly desired. In this thesis the Atomic force microscope (AFM) is applied to accurately characterize the mechanical behavior of viscoelastic samples. The goal is to enhance viscoelastic characterization using the so-called Intermodulation AFM (ImAFM) technique by applying, adapting and improving multiple modelling and optimization methods. In ImAFM force reconstruction is performed by extracting intermodulations around resonance in the cantilever response. These intermodulations present new observables that can be used for characterization. This thesis investigates the potential of this technique in combination with an up-and-coming model describing viscoelastic interaction. A toolbox has been developed for numerical simulations of the model to resemble the experiments. The model has been evaluated in a variety of situations using sensitivity analysis in a large feasibility range, encompassing many complex dynamics. Because of the diversity in model dynamics a global optimization has been performed for experimental reconstruction. Subject Atomic force microscopyViscoelasticityMultifrequencySensitivity analysisOptimization To reference this document use: http://resolver.tudelft.nl/uuid:e22b9020-3c4e-4cbe-89dc-66f658bda169 Embargo date 2023-01-17 Part of collection Student theses Document type master thesis Rights © 2020 Casper Penning Files PDF MSc_Thesis_Report_Casper_ ... enning.pdf 5.53 MB Close viewer /islandora/object/uuid:e22b9020-3c4e-4cbe-89dc-66f658bda169/datastream/OBJ/view