Optical behaviours of two dimensional Au nanoparticle arrays within porous anodic alumina

Hsu, C. R.; Liu, H H

doi:10.1088/1742-6596/61/1/088

Cited by 5 publications

(4 citation statements)

References 20 publications

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“…Broader analyses of 2D periodic arrays of both nanospheres and isotropic nanoscatterers have been carried out in [11,[25][26][27][28]. Likewise, mode propagation in 1D periodic arrays of nanospheres has been analyzed in [21,[29][30][31][32][33][34][35], and broader analyses of 1D periodic arrays of isotropic nanoscatterers and radiators in [36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheres

et al. 2011

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Two-dimensional periodic arrays of noble metal nanospheres support a variety of optical phenomena, including bound and leaky modes of several types. The scope of this paper is the characterization of the modal dispersion diagrams of planar arrays of silver nanospheres, with the ability to follow individual modal evolutions. The metal spherical nanoparticles are described using the single dipole approximation technique by including all the retarded dynamic field terms. Polarizability of the nanospheres is provided by the Mie theory. Dispersion diagrams for both physical and nonphysical modes are shown for a square lattice of Ag nanospheres for the case of lossless and lossy metal particles, with dipole moments polarized along the x, y, and z directions. Though an array with one set of parameters has been studied, the analysis method and classification are general. The evolution of modes through different Riemann sheets and analysis of guidance and radiation are studied in detail.

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Section: Introductionmentioning

confidence: 99%

Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheres

et al. 2011

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“…The nanopore geometry is mainly determined by the electrolyte, anodic condition, and heat treatment rather than the substrate [3][4][5]. On the contrary, the excited blue emission intensity largely decreased with the metal nanoparticles embedded in the nanoporous array in our previous study [6]. Those studies interpret that the optical properties of nanoporous membranes are related to nanostructures.…”

Section: Introductionmentioning

confidence: 50%

“…The blue emission can be red-shifted to 470 nm when the electrolyte is mixing with oxalic acid [6]. Heat treatment produces F 2+ defect center and facilitates a wide emission of 565 nm at annealing temperature of 700 o C. The PL spectrum can be altered by the substrate of AAO upon as well.…”

Section: Introductionmentioning

confidence: 99%

Optical modulation of nanoporous alumina anodic oxide thin film on sapphire by the superparamagnetic from nano patterns upon

Liu

Weng

Wang

et al. 2011

2011 6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems

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The optical behavior of nanoporous alumina anodic oxide thin film (AAOF) on sapphires can be modulated with varying the nanopore diameters. The excited photoluminescence spectrum splits into two wavelengths of near blue and green peaks. This light modulation could relate to the superparamagnetic magnetization of the patterns upon in nanoscale. With increasing the nanopore size by reaming method, the superparamagnetic susceptibility decreases firstly and then increased. When the superparamagnetic susceptibility deviates from that of the as-received, the excited green peak arises. On the other hand, strong superparamagnetic facilitates the excitation of blue peak.

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“…An alternative consists in evaporating a metallic nanoparticle layer on top of the porous alumina substrate to quench the fluorescence. 55 However, this requires an additional treatment which is not required if selenic acid is used for anodization. Hence, it can be concluded that the latter is more suitable to generate AAO matrices for the generation of novel nanostructures for optoelectronics or for the investigation of other functional nanostructures by light scattering techniques, even under heat treatment.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the Ordering of Porous Anodic Alumina Formed by Anodization of Aluminum in Selenic Acid

Nazarkina

Гаврилов

Terryn

et al. 2015

J. Electrochem. Soc.

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The formation of porous alumina by galvanostatic anodization in selenic acid has been investigated. The influence of the electrolyte concentration on the morphological features and the self-ordering behavior of the porous oxide film has been studied. The best pore arrangement is obtained upon anodization in 0.5 M H 2 SeO 4 . Using chronopotentiometry, gravimetric analysis and FESEM it is shown that the highest degree of pore ordering is caused by an optimal combination of the two mechanisms that lead to pore initiation: mechanical instability and field-assisted dissolution. In addition, by means of Raman spectroscopy it is found that the optical properties of porous alumina anodized in selenic acid do not exhibit parasite effects due to electrolyte incorporation during anodization. Hence, these templates are of great interest to fabricate and investigate functional nanostructures for optoelectronics.Porous anodic aluminum oxide (AAO) is widely used as a matrix or a template for the development of various functional nanostructures for photonic, electronic, optoelectronic, magnetic and biomedical applications. 1-7 For the successful application of AAO templates in functional devices it is extremely important to have control over their geometrical properties such as regularity, pore diameter and pore density. Only a few electrolytes have been reported to produce highly ordered porous alumina structures: sulfuric, oxalic and phosphoric acids. 7-13 Other organic electrolytes (tartaric, malonic, citric and glycolic acids) have also been reported to yield porous AAO. 14-18 However, porous alumina fabricated in these electrolytes is either short-range ordered or requires long processing time and/or very high voltages to obtain porous oxides with regular geometries. Although ordered AAO structures could be produced under a wide window of experimental conditions, 19,20 there still exists a range of geometrical parameters which cannot be achieved in these standard electrolytes. 20 One of the possibilities to overcome this problem is to perform hard anodization, 21,22 but this method demands applying high voltages so a powerful cooling system is needed. Besides, it is only used for the production of thick AAO matrices. Thus, the development of new electrolytes that allow expanding the range of porous alumina matrix properties is essential. In this regard, selenic acid (H 2 SeO 4 ) has been recently suggested as a new self-ordering electrolyte. 23,24 It has been shown that self-ordered porous alumina structures could be rapidly produced (in 1 h) by selenic acid anodization, showing very promising AAO geometrical features: small pores (15-20 nm) and relatively small pore density (9.2 · 10 9 pores cm −2 ).Furthermore, AAO obtained in selenic acid could also be used as a template for the fabrication and investigation of functional structures for optoelectronics. It is known that porous oxides derived from oxalic acid, other carboxylic acids and phosphoric acid are photoluminescent due to the presence of oxygen vacancies and carb...

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Optical behaviours of two dimensional Au nanoparticle arrays within porous anodic alumina

Cited by 5 publications

References 20 publications

Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheres

Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheres

Optical modulation of nanoporous alumina anodic oxide thin film on sapphire by the superparamagnetic from nano patterns upon

Investigation of the Ordering of Porous Anodic Alumina Formed by Anodization of Aluminum in Selenic Acid

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