Photoluminescence oscillations in porous alumina films

Huang, Kelong; Peng, Lin; Shi, Yan-Li; Han, Ping; Zhang, R.; Zheng, Yi

doi:10.1063/1.2390645

Cited by 35 publications

(23 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Up to now, the PL nature of different emissions is still ambiguous though most of reports have tentatively attributed them to F + and F centers, related to oxygen vacancy defects, as well as, to oxalic impurities (especially light elements) [25,26]. Small superimposed oscillations that appear on the PL curves could be associated with interference effects like Huang et al recently published [27]. In contrast to γ--alumina nanoparticles [28], here under ultraviolet excitation (λ exc = 244 nm with a power density of 10 3 W/cm 2 ) there is no induced degradation in the PL intensity of low energy bands.…”

Section: Resultsmentioning

confidence: 99%

Optical Investigation of ZnO Nanowires

et al. 2010

View full text Add to dashboard Cite

In this study we report the application of synchrotron X-ray fluorescence, photoluminescence and Raman scattering techniques to the analysis of the incorporation of impurities in unintentionally doped ZnO nanowires. Highly ordered one-dimensional ZnO arrays were fabricated by an oxidation process of Zn metal electrodeposited in nanoporous anodic alumina template. X-ray fluorescence data show the contribution of residual elements into the ZnO nanowires growth. A rough analytical quantification of the main light and heavy chemical contents derives impurity concentrations below 1%. The optical efficiency of ZnO nanowires is strongly affected by non-radiative centers up to temperatures as low as 100 K. The photoluminescence was found to be totally dominated by optical transitions associated with the anodic alumina template. Finally, the Raman scattering provides no evidence of local vibrational modes or secondary phases, but it shows the unambiguous signature of the ZnO hexagonal phase.

show abstract

Section: Resultsmentioning

confidence: 99%

Optical Investigation of ZnO Nanowires

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Previous studies have pointed out that the PL spectrum of NAA presents oscillations generated by the Fabry-Pérot effect. [11] The number, intensity and position of those oscillations rely on the NAA thickness (i.e., the pore length). In preliminary experiments, we have observed that these oscillations are related to the pore diameter too.…”

Section: Doi: 101002/adma201104490mentioning

confidence: 99%

Nanoporous Anodic Alumina Barcodes: Toward Smart Optical Biosensors

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Huang et al reported that thin porous AAOs can act as a Fabry-Pérot optical cavity constituted by the air-AAO-Al, producing oscillating reflectance and PL spectra due to multiple-reflection interferences of the propagating waves [121]. From the fact that the band gap of alumina is much bigger than the photon energy of the considered PL spectral range (typically, 2.25-3.54 eV) and the absorption coefficient is very small, the authors deduced the optical thickness (2nL AAO ) of porous AAOs [121]:…”

Section: Pore Wideningmentioning

confidence: 99%

Structural Engineering of Porous Anodic Aluminum Oxide (AAO) and Applications

Lee

2015

Nanoporous Alumina

View full text Add to dashboard Cite

Porous anodic aluminum oxide (AAO) films can be conveniently produced by anodization of aluminum. Porous oxide layer formed on aluminum contains a large number of mutually parallel pores. Each cylindrical nanopore and its surrounding oxide constitute a hexagonal cell aligned normal to the metal surface. Under proper conditions, the oxide cells are self-organized to form a hexagonally close-packed structure. The novel and tunable structural features of porous AAOs have been intensively exploited for templated synthesis of a variety of functional nanostructures and also for fabrication of nanodevices. On the other hand, porous AAOs with modulated pores may provide an additional degree of freedom in templated synthesis. In addition, they can be used as model systems for systematically investigating structure-property relations of nanostructured materials. Based on the anodization techniques developed recently, one can fabricate porous AAOs with tailor-made internal pore structures. This chapter is devoted to conveying the most recent advances in structural engineering of porous AAOs and nanotechnology applications. In order to provide context, a brief description is given of the general structure and fundamental electrochemical processes associated with pore formation. Subsequently, two common anodizing techniques (i.e., mild and hard anodizations) that have been explored for nanotechnology applications are discussed. Next, various nanostructuring approaches for custom-designed porous AAOs are reviewed. The chapter covers the properties of porous AAOs derived from structural engineering and their applications to various nanotechnology researches and finally presents the challenges and future prospects.

show abstract

Photoluminescence oscillations in porous alumina films

Cited by 35 publications

References 25 publications

Optical Investigation of ZnO Nanowires

Optical Investigation of ZnO Nanowires

Nanoporous Anodic Alumina Barcodes: Toward Smart Optical Biosensors

Structural Engineering of Porous Anodic Aluminum Oxide (AAO) and Applications

Contact Info

Product

Resources

About