Morphological, structural and optical characterization of SnO2 nanotube arrays fabricated using anodic alumina (AAO) template-assisted atomic layer deposition

Małgorzata Norek, Matti Putkonen, Wojciech Zaleszczyk, Bogusław Budner, Zbigniew Bojar

    Research output: Contribution to journalArticleScientificpeer-review

    4 Citations (Scopus)

    Abstract

    Self-aligned and equal-space SnO2 nanotubes (NTs) with external diameters ranging from ca. 124 to ca. 325 nm and wall thickness of around 30 nm were synthesized by AAO template-assisted atomic layer deposition. The bulk and surface structure of the SnO2 nanostructures were studied in detail by XRD and XPS techniques, respectively. The SnO2 NTs were polycrystalline with an average crystallite size of ca. 3 nm. The structure analysis has revealed that the SnO2 NTs are composed of the rutile-type SnO2. The SnO2 nanotube arrays with the smaller external diameters emitted green light centered at around 520 nm. The emission was ascribed to the radiative recombination between electrons trapped in shallow donor levels and holes at the intrinsic surface states, associated with the oxygen deficient sites near surface region. The PL intensity diminished with the nanotube diameter and spacing. With increasing external diameter of the SnO2 nanotubes and decreasing the distance between the neighboring nanotubes, the emission become progressively weaker. The results demonstrate that the structure, morphology and arrangement of SnO2 nanotubes play an important role in their luminescent properties.

    Original languageEnglish
    Pages (from-to)52-59
    Number of pages8
    JournalMaterials Characterization
    Volume136
    DOIs
    Publication statusPublished - 1 Feb 2018
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Atomic layer deposition
    Aluminum Oxide
    atomic layer epitaxy
    Nanotubes
    nanotubes
    Alumina
    templates
    aluminum oxides
    Methyl Green
    Surface states
    radiative recombination
    Crystallite size
    Surface structure
    rutile
    Nanostructures
    X ray photoelectron spectroscopy
    spacing
    Oxygen
    Electrons
    oxygen

    Keywords

    • Atomic layer deposition
    • Luminescence properties
    • Porous anodic alumina
    • Tin oxide

    Cite this

    Norek, Małgorzata ; Putkonen, Matti ; Zaleszczyk, Wojciech ; Budner, Bogusław ; Bojar, Zbigniew. / Morphological, structural and optical characterization of SnO2 nanotube arrays fabricated using anodic alumina (AAO) template-assisted atomic layer deposition. In: Materials Characterization. 2018 ; Vol. 136. pp. 52-59.
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    Morphological, structural and optical characterization of SnO2 nanotube arrays fabricated using anodic alumina (AAO) template-assisted atomic layer deposition. / Norek, Małgorzata; Putkonen, Matti; Zaleszczyk, Wojciech; Budner, Bogusław; Bojar, Zbigniew.

    In: Materials Characterization, Vol. 136, 01.02.2018, p. 52-59.

    Research output: Contribution to journalArticleScientificpeer-review

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    AU - Norek, Małgorzata

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    AU - Zaleszczyk, Wojciech

    AU - Budner, Bogusław

    AU - Bojar, Zbigniew

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    N2 - Self-aligned and equal-space SnO2 nanotubes (NTs) with external diameters ranging from ca. 124 to ca. 325 nm and wall thickness of around 30 nm were synthesized by AAO template-assisted atomic layer deposition. The bulk and surface structure of the SnO2 nanostructures were studied in detail by XRD and XPS techniques, respectively. The SnO2 NTs were polycrystalline with an average crystallite size of ca. 3 nm. The structure analysis has revealed that the SnO2 NTs are composed of the rutile-type SnO2. The SnO2 nanotube arrays with the smaller external diameters emitted green light centered at around 520 nm. The emission was ascribed to the radiative recombination between electrons trapped in shallow donor levels and holes at the intrinsic surface states, associated with the oxygen deficient sites near surface region. The PL intensity diminished with the nanotube diameter and spacing. With increasing external diameter of the SnO2 nanotubes and decreasing the distance between the neighboring nanotubes, the emission become progressively weaker. The results demonstrate that the structure, morphology and arrangement of SnO2 nanotubes play an important role in their luminescent properties.

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