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

Journal Article · Thu Feb 15 04:00:00 EST 2018 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2017.12.009· OSTI ID:22804885

Norek, Małgorzata ^[1]; Putkonen, Matti ^[2]; Zaleszczyk, Wojciech ^[3]; Budner, Bogusław; Bojar, Zbigniew ^[1]

---

1. Department of Advanced Materials and Technologies, Faculty of Advanced Technologies and Chemistry, Military University of Technology, Str. Kaliskiego 2, 00-908 Warszawa (Poland)
2. VTT Technical Research Centre of Finland, Biologinkuja 5, Espoo, P.O. Box 1000, FI-02044, VTT, Espoo (Finland)
3. Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw (Poland)

Highlights: • SnO{sub 2} nanotubes were fabricated by AAO template-assisted atomic layer deposition. • Bulk and surface structure of the SnO{sub 2} nanotubes (NTs) were studied in detail. • The SnO{sub 2} nanotube arrays emitted green light centered at around 520 nm. • PL properties of the SnO{sub 2} NTs depended on their morphology and surface structure. - Abstract: Self-aligned and equal-space SnO{sub 2} 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 SnO{sub 2} nanostructures were studied in detail by XRD and XPS techniques, respectively. The SnO{sub 2} NTs were polycrystalline with an average crystallite size of ca. 3 nm. The structure analysis has revealed that the SnO{sub 2} NTs are composed of the rutile-type SnO{sub 2}. The SnO{sub 2} 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 SnO{sub 2} nanotubes and decreasing the distance between the neighboring nanotubes, the emission become progressively weaker. The results demonstrate that the structure, morphology and arrangement of SnO{sub 2} nanotubes play an important role in their luminescent properties.

• OSTI ID: 22804885
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 136; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ALUMINIUM OXIDES
DEPOSITION
LAYERS
LUMINESCENCE
NANOTUBES
POROUS MATERIALS
SURFACES
THICKNESS
TIN OXIDES
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY