Novel response function resolves by image deconvolution more details of surface nanomorphology

    Research output: Contribution to journalArticle

    Abstract

    A novel method of image processing is presented which relies on deconvolution of data using the response function of the apparatus. It is revealed that all the surface structures observed by digital imaging are generated by a convolution of the response function of the apparatus with the surfaces' nanomorphology, which provided images of convoluted physical structures rather than images of real physical structures. In order to restore the genuine physical information on surface structures, a deconvolution using a novel response function of the feedback circuitry is required. At the highest resolution, that is, atomic resolution, the effect of deconvolution is at its maximum, whereas images at lower resolution are sharpened by eliminating smoothing effects and shadow effects. The method is applied to measurements of imaging by in situ scanning tunnelling microscopy (in situ STM) at atomic resolution and to imaging by in situ STM of electrocrystallization of copper on gold in electrolytes containing copper sulfate and sulfuric acid. It is suggested that the observed peaks of the recorded image do not represent atoms, but the atomic structure may be recovered by image deconvolution followed by calibration of distances, correction for drift phenomena and rotation in the plane of the surface. The technology may subsequently reveal more details of molecular adsorbents. The impact of in situ STM at atomic and lower resolution on imaging is discussed in the paper.

    Original languageEnglish
    Article number055602
    JournalPhysica Scripta
    Volume82
    Issue number5
    DOIs
    Publication statusPublished - Nov 2010

    Fingerprint

    Deconvolution
    Response Function
    Resolve
    Microscopy
    scanning tunneling microscopy
    Scanning
    Imaging
    Copper
    Digital Imaging
    Smoothing Effect
    copper
    Method of Images
    Electrolyte
    sulfuric acid
    adsorbents
    convolution integrals
    smoothing
    Gold
    atomic structure
    image processing

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Atomic and Molecular Physics, and Optics
    • Mathematical Physics

    Cite this

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    abstract = "A novel method of image processing is presented which relies on deconvolution of data using the response function of the apparatus. It is revealed that all the surface structures observed by digital imaging are generated by a convolution of the response function of the apparatus with the surfaces' nanomorphology, which provided images of convoluted physical structures rather than images of real physical structures. In order to restore the genuine physical information on surface structures, a deconvolution using a novel response function of the feedback circuitry is required. At the highest resolution, that is, atomic resolution, the effect of deconvolution is at its maximum, whereas images at lower resolution are sharpened by eliminating smoothing effects and shadow effects. The method is applied to measurements of imaging by in situ scanning tunnelling microscopy (in situ STM) at atomic resolution and to imaging by in situ STM of electrocrystallization of copper on gold in electrolytes containing copper sulfate and sulfuric acid. It is suggested that the observed peaks of the recorded image do not represent atoms, but the atomic structure may be recovered by image deconvolution followed by calibration of distances, correction for drift phenomena and rotation in the plane of the surface. The technology may subsequently reveal more details of molecular adsorbents. The impact of in situ STM at atomic and lower resolution on imaging is discussed in the paper.",
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    Novel response function resolves by image deconvolution more details of surface nanomorphology. / Andersen, Jens E T.

    In: Physica Scripta, Vol. 82, No. 5, 055602, 11.2010.

    Research output: Contribution to journalArticle

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