Photoluminescence properties of anodic alumina membranes with ordered nanopore arrays

2006 ◽  
Vol 121 (2) ◽  
pp. 588-594 ◽  
Author(s):  
Xiuyu Sun ◽  
Faqiang Xu ◽  
Zongmu Li ◽  
Wenhua Zhang
Keyword(s):  
Anodic Alumina ◽  
Photoluminescence Properties ◽  
Alumina Membranes ◽  
Nanopore Arrays

Fabrication, characterization, and photoluminescence properties of highly ordered TiO2 nanowire arrays

2001 ◽  
Vol 16 (4) ◽  
pp. 1138-1144 ◽  
Author(s):  
Y. Lei ◽  
L. D. Zhang
Keyword(s):  
Anatase Phase ◽  
Sol Gel ◽  
Broad Band ◽  
Anodic Alumina ◽  
Nanowire Arrays ◽  
Photoluminescence Properties ◽  
Alumina Membrane ◽  
Tio2 Nanowire ◽  
Alumina Membranes ◽  
Center Area

Highly ordered TiO2 nanowire arrays were prepared in anodic alumina membranes by a sol-gel method. The nanowires are single-crystalline anatase phase with uniform diameters around 50 nm. At room temperature, photoluminescence (PL) measurements of these TiO2 nanowire arrays showed a visible broad band with three peaks, which were located at about 425, 460, and 530 nm that are attributed to self-trapped excitons, F, and F+ centers, respectively. A model is also presented to explain the PL intensity drop-down of the TiO2 nanowire arrays embedded in the alumina membrane: the blue PL band of the anodic alumina membranes arises from the F+ centers on the pore walls, and the TiO2 nanowires first form in the center area of the pores and then extend to the pore walls.

Self-Ordering of Cell Configurations and Photoluminescence Properties of Anodic Alumina Membranes with Large Pore Diameters

2019 ◽  
Vol 14 (12) ◽  
pp. 1664-1666
Author(s):  
Haibin Zheng ◽  
Hongxia Bu
Keyword(s):  
Oxygen Vacancies ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Photoluminescence Properties ◽  
Ultraviolet Emission ◽  
Alumina Membranes ◽  
Large Pore

Porous anodic alumina membranes (AAMs) with the 200 nm pores were successfully prepared electrochemically from Al sheets embedded H3PO4 solution. We found that the fitted voltage for the anodization is 160 V, and the concentration of the electrolyte is 0.1 M. Photoluminescence (PL) measurements of AAMs showed an ultraviolet emission at 320 nm, which originated from ionized oxygen vacancies (F+ centers).

Preparation and Characterization of Anodic Alumina Membrane with Nanopore Arrays

2012 ◽  
Vol 549 ◽  
pp. 358-361
Author(s):  
Xiao Hong Tang ◽  
Wen Bin Yang ◽  
Ya Fei Cheng ◽  
Quan Guo Huang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Pure Aluminum ◽  
Aluminum Foil ◽  
Honeycomb Structure ◽  
Anodic Alumina ◽  
Alumina Membrane ◽  
Energy Dispersion Spectroscopy ◽  
X Ray ◽  
Alumina Membranes ◽  
Nanopore Arrays

Anodic alumina membranes (AAM) with nanopore arrays were prepared by one-step anodization of highly pure aluminum foil. Morphology, structure and composition of AAM were characterized by scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). Results showed that AAM owned honeycomb structure which was characterized by close-packed arrays of columnar hexagonal cells, each containing a central pore normal to the substrate. The diameter of pores and the size of cells changed under different anodic conditions, such as temperature, concentration of H2C2O4 solution, voltage and time of anodization. The walls of AAM were composed of two strains of nanoparticles of alumina. Furthermore, the chemical composition of AAM was found to be amorphous alumina. The prepared AAM with nanopore arrays is a kind of ideal template for preparation of many one-dimensional nanomaterials.

Preparation of thin anodic alumina membranes and their utilization for template electrodeposition

2016 ◽  
Vol 10 (3) ◽  
pp. 548-553 ◽  
Author(s):  
A. P. Leontiev ◽  
I. V. Roslyakov ◽  
A. S. Vedeneev ◽  
K. S. Napolskii
Keyword(s):  
Anodic Alumina ◽  
Alumina Membranes

scholarly journals Anodic Alumina Membranes: From Electrochemical Growth to Use as Template for Fabrication of Nanostructured Electrodes

2022 ◽  
Vol 12 (2) ◽  
pp. 869
Author(s):  
Bernardo Patella ◽  
Salvatore Piazza ◽  
Carmelo Sunseri ◽  
Rosalinda Inguanta
Keyword(s):  
Morphological Characteristics ◽  
Bath Temperature ◽  
Anodic Alumina ◽  
Great Success ◽  
Porous Layers ◽  
Electrochemical Growth ◽  
Alumina Membranes ◽  
Aluminum Ions ◽  
Pore Length ◽  
Alloy Nanowires

The great success of anodic alumina membranes is due to their morphological features coupled to both thermal and chemical stability. The electrochemical fabrication allows accurate control of the porous structure: in fact, the membrane morphological characteristics (pore length, pore diameter and cell density) can be controlled by adjusting the anodizing parameters (bath, temperature, voltage and time). This article deals with both the fabrication and use of anodic alumina membranes. In particular, we will show the specific role of the addition of aluminum ions to phosphoric acid-based anodizing solution in modifying the morphology of anodic alumina membranes. Anodic alumina membranes were obtained at −1 °C in aqueous solutions of 0.4 M H3PO4 added with different amounts of Al(OH)3. For sake of completeness, the formation of PAA in pure 0.4 M H3PO4 in otherwise identical conditions was also investigated. We found that the presence of Al(OH)3 in solution highly affects the morphology of the porous layer. In particular, at high Al(OH)3 concentration (close to saturation) more compact porous layers were formed with narrow pores separated by thick oxide. The increase in the electric charge from 20 to 160 C cm−2 also contributes to modifying the morphology of porous oxide. The obtained anodic alumina membranes were used as a template to fabricate a regular array of PdCo alloy nanowires that is a valid alternative to Pt for hydrogen evolution reaction. The PdCo alloy was obtained by electrodeposition and we found that the composition of the nanowires depends on the concentration of two metals in the deposition solution.

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