Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7148

Browse

Filters

2003 - 200912010 - 20142

Settings

COAR Access Rights: search.filters.coarAccessRights.open accessSubject: search.filters.subject.AFM

Search Results

Now showing 1 - 3 of 3
  • 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.
  • Article
    Citation - WoS: 29
    Citation - Scopus: 30
    The Structural, Optical and Morphological Properties of Caf2 Thin Films by Using Thermionic Vacuum Arc (tva)
    (Elsevier Ltd., 2013) Çetin, N. Emre; Korkmaz, Şadan; Elmas, Saliha; Ekem, Naci; Pat, Suat; Balbag, M. Zafer; Tarhan, Enver; Temel, Sinan; Özmumcu, Murat
    In this study, calcium fluoride (CaF2) thin films have been prepared by Thermionic Vacuum Arc (TVA) technique on glass substrates. In this technique CaF2 thin films are produced by condensing the plasma of anode material generated in the TVA setup under high vacuum conditions on glass substrates. Crystal structures as well as optical and surface properties of CaF2 antireflective (AR) coated thin films were investigated. X-ray diffraction (XRD) measurements showed that amorphous CaF2 thin films were formed. Optical and surface properties of CaF2 films have been studied based on optical transmittance, reflectance, refractive index and atomic force microscopy imaging (AFM). Our results also show that CaF2 coated samples exhibit lower reflectance (R). From our optical studies, we have observed that CaF2 thin films have high AR properties.
  • Article
    Citation - WoS: 29
    Citation - Scopus: 32
    Visualization of the Equilibrium Fcc Catalyst Surface by Afm and Sem-Eds
    (Kluwer Academic Publishers, 2003) Bayraktar, Oğuz; Kugler, Edwin L.
    The deposition of metal contaminants (e.g., Ni, V, and Fe) from the hydrocarbon feed causes the deactivation of fluid catalytic cracking (FCC) catalyst used in petroleum refining. It is very important to understand the changes in the morphology and chemical composition on the catalyst surface and how these structural and chemical changes affect the catalyst performance. In this research, metal-contaminated FCC catalysts from a commercial unit have been characterized using AFM together with SEM-EDS. The AFM images showed the surface pores as well as the features that surround the pore's entrance on the catalyst surface. Catalyst surface contains debris that appear as bright spots in AFM images. SEM-EDS results have shown the presence of iron in these bright spots. Fe enrichment at the catalyst particle surface was also confirmed by XPS analyses.