Print Email Facebook Twitter Tip identification in atomic force microscopy using nonlinear dynamics Title Tip identification in atomic force microscopy using nonlinear dynamics Author Gribnau, Thomas (TU Delft Mechanical, Maritime and Materials Engineering; TU Delft Precision and Microsystems Engineering) Contributor Rull Trinidad, E. (mentor) Alijani, F. (mentor) Staufer, U. (mentor) Steeneken, P.G. (graduation committee) Spronck, J.W. (graduation committee) Degree granting institution Delft University of Technology Programme Mechanical Engineering | Micro and Nano Engineering Date 2017-12-04 Abstract Since its invention, the Atomic Force Microscope has emerged into one of the most useful tools innanotechnology due to its acclaimed abilities in exploring surface topography, micro- and nanoscale manipulationand characterization. The nonlinear interaction between the cantilever tip and the sample surfacehas been studied in great detail and a thorough understanding of the cantilever dynamics can improvemeasurements and lead to new methods for identification, manipulation and characterization. One of thebiggest challenges in the field of AFM is related to the identification of the cantilever tip size. The accuracy ofmeasurements in AFM is directly related to the size and geometry of this tip. It is desired that the tip conditioncan be continuously monitored in between or even throughout measurements in order to provide highquality measurements. In this thesis project, a methodology for tip assessment is introduced based on thenonlinear dynamic response of the cantilever. The method consists of the acquisition of frequency responsecurves in the attractive regime where the influence of the tip radius is predominant. Experimental frequencyresponse curves are fitted to the tip-sample interaction model that includes the van der Waals forces. It isfound that exploiting the nonlinear dynamic response of the cantilever is a safe and accurate method for tipassessment. Subject Atomic force microscopyNonlinear dynamicsvan der Waals forcesIntermolecular forces To reference this document use: http://resolver.tudelft.nl/uuid:c52aadfd-0437-4d24-8758-4fd85f6a4231 Part of collection Student theses Document type master thesis Rights © 2017 Thomas Gribnau Files PDF ThesisFinal_ThomasGribnau.pdf 17.24 MB Close viewer /islandora/object/uuid:c52aadfd-0437-4d24-8758-4fd85f6a4231/datastream/OBJ/view