Electrical - Electronic Engineering / Elektrik - Elektronik Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/11

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Institution Author: search.filters.institutionAuthor.Balantekin, MüjdatPublication Index: search.filters.publicationIndex.WoS

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Now showing 1 - 3 of 3
  • Article
    Citation - WoS: 3
    Citation - Scopus: 3
    Manipulating the Frequency Response of Small High-Frequency Atomic Force Microscope Cantilevers
    (IOP Publishing, 2020) Brar, Harpreet Singh; Balantekin, Müjdat
    We study small (less than 10 mu m-long) high-frequency (greater than 1 MHz) cantilevers specially designed for visualization of biomolecular processes in high-speed atomic force microscopes. The frequency responses of the first three flexural eigenmodes are investigated for the modified geometries. It is found that the Q-factors can be significantly altered in the desired way by reengineering the cantilever geometry without affecting its main operational parameters, such as the spring constant and the resonance frequency of the first flexural eigenmode in an air environment. In addition, higher-order flexural resonances can be moved away from the fundamental resonance with these geometrical modifications. The Q-factors in liquid, on the other hand, do not show a significant difference due to high viscous damping of the medium. Regular cantilevers modified by a focused ion beam are used to demonstrate the validity of the finite element simulation model.
  • Article
    Citation - WoS: 5
    Citation - Scopus: 7
    High-Speed Dynamic Atomic Force Microscopy by Using a Q-Controlled Cantilever Eigenmode as an Actuator
    (Elsevier Ltd., 2015) Balantekin, Müjdat
    We present a high-speed operating method with feedback to be used in dynamic atomic force microscope (AFM) systems. In this method we do not use an actuator that has to be employed to move the tip or the sample as in conventional AFM setups. Instead, we utilize a Q-controlled eigenmode of an AFM cantilever to perform the function of the actuator. Simulations show that even with an ordinary tapping-mode cantilever, imaging speed can be increased by about 2 orders of magnitude compared to conventional dynamic AFM imaging.
  • Article
    Citation - WoS: 3
    Citation - Scopus: 3
    High-Speed Tapping-Mode Atomic Force Microscopy Using a Q-Controlled Regular Cantilever Acting as the Actuator: Proof-Of Experiments
    (American Institute of Physics, 2014) Balantekin, Müjdat; Satır, Sarp; Torello, David; Değertekin, F. L.
    We present the proof-of-principle experiments of a high-speed actuationmethod to be used in tapping-mode atomic force microscopes (AFM). In this method, we do not employ a piezotube actuator to move the tip or the sample as in conventional AFM systems, but, we utilize a Q-controlled eigenmode of a cantilever to perform the fast actuation. We show that the actuation speed can be increased even with a regular cantilever.