Unveiling the origin of photoluminescence in nanoporous anodic alumina (NAA) obtained by constant current regime

Cantelli, Lory; Santos, Janaína S.; Silva, Tiago Fiorini da; Tabacniks, M.H.; Delgado-Silva, Adriana O.; Trivinho‐Strixino, Francisco

doi:10.1016/j.jlumin.2018.10.015

Cited by 15 publications

(17 citation statements)

References 47 publications

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“…Additionally, NAA has photoluminescent properties [ 39 ]. The origin of the photoluminescent properties of NAA was examined by Cantelli et al [ 40 ]. Recombination centers derived from oxygen defects were proposed as the origin of the emission.…”

Section: Nanoporous Anodic Alumina (Naa): Definition and Formationmentioning

confidence: 99%

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

2021

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The development of aluminum anodization technology features many stages. With the story stretching for almost a century, rather straightforward—from current perspective—technology, raised into an iconic nanofabrication technique. The intrinsic properties of alumina porous structures constitute the vast utility in distinct fields. Nanoporous anodic alumina can be a starting point for: Templates, photonic structures, membranes, drug delivery platforms or nanoparticles, and more. Current state of the art would not be possible without decades of consecutive findings, during which, step by step, the technique was more understood. This review aims at providing an update regarding recent discoveries—improvements in the fabrication technology, a deeper understanding of the process, and a practical application of the material—providing a narrative supported with a proper background.

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Section: Nanoporous Anodic Alumina (Naa): Definition and Formationmentioning

confidence: 99%

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

2021

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“…Another property of AAO oxide attributed to incorporated anions is an intense and broad photoluminescence band in the blue region when excited under ultraviolet light (UV). Despite a large number of publications on this topic, the exact origin and mechanism of AAO photoluminescence are still debatable [102]. The PL can be modulated by the pore diameter, the variation of excitation wavelength and the change of the annealing temperature [103].…”

Section: Photoluminescence and Galvanoluminescencementioning

confidence: 99%

“…Conversely, the incorporation of impurities could occur from water electrolysis. Multiple authors agreed that high-intensity emission bands could be related to the presence of a high concentration of oxygen vacancies [70,101,102].…”

Section: Photoluminescence and Galvanoluminescencementioning

confidence: 99%

“…Canelli et al [102] studied the photoluminescence of nanoporous anodic alumina prepared by galvanostatic anodization by applying 5 mA cm -2 for 90 min at 20 • C in three different electrolytes: oxalic acid, phosphoric acid, and an equimolar mixture of oxalic and phosphoric acids. After anodization, the Al substrate was removed from the AAO porous layer in a solution of CuCl 2 and HCl.…”

Section: Photoluminescence and Galvanoluminescencementioning

confidence: 99%

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Incorporation of Ions into Nanostructured Anodic Oxides—Mechanism and Functionalities

2021

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Anodic oxidation of metals leads to the formation of ordered nanoporous or nanotubular oxide layers that contribute to numerous existing and emerging applications. However, there are still numerous fundamental aspects of anodizing that have to be well understood and require deeper understanding. Anodization of metals is accompanied by the inevitable phenomenon of anion incorporation, which is discussed in detail in this review. Additionally, the influence of anion incorporation into anodic alumina and its impact on various properties is elaborated. The literature reports on the impact of the incorporated electrolyte anions on photoluminescence, galvanoluminescence and refractive index of anodic alumina are analyzed. Additionally, the influence of the type and amount of the incorporated anions on the chemical properties of anodic alumina, based on the literature data, was also shown to be important. The role of fluoride anions in d-electronic metal anodizing is shown to be important in the formation of nanostructured morphology. Additionally, the impact of incorporated anionic species, such as ruthenites, and their influence on anodic oxides formation, such as titania, reveals how the phenomenon of anion incorporation can be beneficial.

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“…[25,28,29], такие нарушения создают кислородные вакансии, захватившие один или несколько электронов (центры F-типа) и представляющие собой эффективные центры излучательной рекомбинации. Максимум излучения, создаваемого такими центрами, приходится на диапазон λ порядка 440−480 nm (при УФ возбуждении фотолюминесценции с λ ∼ 254−320 nm [25,28,29]). Как видно из полученных нами данных для сложных эфиров и кетонов, в этот диапазон укладывается коротковолновая составляющая спектра ЭЛ Al 2 O 3 , но с различной интенсивностью для разных веществ, что особенно хорошо отражают спектры на рис.…”

Section: аббревиатураunclassified

Особенности Электролюминесценции Алюминия И Его Нанопористого Оксида В Сложных Эфирах И Кетонах

Oвеченко¹,

Бойченко²,

Яковенко³

2021

Оптика И Спектроскопия

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On the example of esters of carboxylic and dicarboxylic acids (ethyl acetate, diethyl oxalate, diethyl malonate, diethyl phthalate and dibutyl phthalate), as well as ketones, lactams and diketones (acetone, cyclohexanone, 4-ethylpropiophenone, acetylacetone and methylpyrrolidone) studies were carried out to generate electroluminescence (EL) in them of pure aluminum (Al) and preoxidized (Al2O3) in distilled water. The absence of EL in pure Al in ethers was revealed, and the regularities of luminescence generation in them for the oxidized metal were established. It was shown that in ketones and related compounds - lactams and diketones, the appearance of EL is possible for both states of the Al anode. In this case, the EL spectra have broad bands in the range 400 - 700 nm with maxima characteristic of the carboxyl and carbonyl groups of the electrolytes used, as well as the nanoporous structure of the formed Al2O3 and carbon-containing impurities captured by it during the growth. In some ethers and ketones, the effect of transformation of the initial structure of the oxide, as well as an increase in its thickness, was found. The absence of any changes in the chemical composition of electrolytes after anodic oxidation of Al in them or transformation of Al2O3 was established by UV, IR and NMR spectroscopy.

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Unveiling the origin of photoluminescence in nanoporous anodic alumina (NAA) obtained by constant current regime

Cited by 15 publications

References 47 publications

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

Incorporation of Ions into Nanostructured Anodic Oxides—Mechanism and Functionalities

Особенности Электролюминесценции Алюминия И Его Нанопористого Оксида В Сложных Эфирах И Кетонах

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