Fabrication of porous anodic aluminium oxide layers on paper for humidity sensors

Baldé, Mamadou; Vena, Arnaud; Sorli, Brice

doi:10.1016/j.snb.2015.05.053

Cited by 59 publications

(30 citation statements)

References 55 publications

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“…Other porous configuration that has gained an increasing interest during the last years is anodic aluminum oxide (AAO). As for the PSi, the fabrication process of AAO is simple and cost-effective, since it is based on a self-ordered anodization of aluminum that yields a vertically aligned and a highly ordered porous structure [19]. Sensitivities in the range of 441 nm/RIU have been reported using AAO-based porous structures measured in the VIS range of the spectrum [20].…”

Section: Introductionmentioning

confidence: 99%

Optical sensors based on polymeric nanofibers layers created by electrospinning

Ponce-Alcántara

Martín-Sánchez

Pérez-Márquez

et al. 2018

Opt. Mater. Express

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Porous materials have become ideal candidates for the creation of optical sensors that are able to reach extremely high sensitivities, due to both the possibility to infiltrate the target substances on them and to their large surface-to-volume ratio. In this work, we present a new alternative for the creation of porous optical sensors based on the use of polymeric nanofibers (NFs) layers fabricated by electrospinning. Polyamide 6 (PA6) NFs layers with average diameters lower than 30 nm and high porosities have been used for the creation of Fabry-Pérot optical sensing structures, which have shown an experimental sensitivity up to 1060 nm/RIU (refractive index unit). This high sensitivity, together with the low production cost and the possibility to be manufactured over large areas, make NFs-based structures a very promising candidate for the development of low-cost and high performance optical sensors.

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Section: Introductionmentioning

confidence: 99%

Optical sensors based on polymeric nanofibers layers created by electrospinning

Ponce-Alcántara

Martín-Sánchez

Pérez-Márquez

et al. 2018

Opt. Mater. Express

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“…Initially the signal due to –NH proton of DBF (δ 9.97 ppm) diminishes appreciably while other signals remain intact upon addition of 0.2 equivalent of Al 3+ . The signal for –NH proton at δ 9.97 ppm continuously declines and get vanished completely at 1 equivalents of Al 3+ , suggesting its involvement in enolization of >C=O group and deprotonation during interaction of DBF with Al 3+ . At this concentration, the signal observed at δ 11.90 (OH a ) and δ 11.29 ppm (OH b ) are shifted downfield to δ 12.10 ppm and 11.50 ppm, respectively, which is due to the decrease in electron density of benzene ring upon coordination with Al 3+ .…”

Section: Resultsmentioning

confidence: 92%

“…The signal for -NH proton at δ 9.97 ppm continuously declines and get vanished completely at 1 equivalents of Al 3 + , suggesting its involvement in enolization of > C=O group and deprotonation during interaction of DBF with Al 3 + . [34,35] At this concentration, the signal observed at δ 11.90 (OH a ) and δ 11.29 ppm (OH b ) are shifted downfield to δ 12.10 ppm and 11.50 ppm, respectively, which is due to the decrease in electron density of benzene ring upon coordination with Al 3 + . The peak at δ 8.50 ppm (HC=N) is shifted upfield to δ 8.25 ppm due to coordination of azomethine-nitrogen with Al 3 + .…”

Section: H Nmr Titrationmentioning

confidence: 98%

A “Turn‐On” Fluorescence Probe for Selective Detection of Al ³⁺ in Aqueous Environment: Crystal Structure, Theoretical and Cell Imaging Studies

et al. 2020

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A furan‐based water soluble fluorescent probe (E)‐N′‐(2,4‐dihydroxybenzylidene)furan‐2‐carbohydrazide (DBF) has been synthesized and characterized by 1H NMR, 13C NMR, ESI‐mass spectroscopy and single crystal X‐ray diffraction techniques. The synthesized probe exhibits a “turn‐on” fluorescence response towards Al3+ in Tris‐HCl buffer (10 mM) with no significant interference from other metal ions. The strong fluorescence in the presence of Al3+ is attributed to the CHEF (chelation enhanced fluorescence), inhibition of PET (photo‐induced electron transfer) and C=N isomerization. 1 : 1 stoichiometric ratio between DBF and Al3+ was rationalized by Job's plot. Binding constant and LOD were calculated to be 1.031×105 M−1 and 6.34×10−8 M, respectively. MTT assay on live A549 cells indicated no serious cytotoxicity in the cells even at higher concentration. Further, DBF was successfully used for the detection of accumulated Al3+ in the cytoplasm of cells.

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“…Walaupun boleh didapati di pasaran, malangnya AAO komersial ini kurang sesuai digunakan sebagai acuan bagi penumbuhan nanostruktur berikutan kewujudan banyak liang bercabang, dinding liang yang runtuh selain harganya yang mahal. Kekurangan pada AAO komersial ini menyebabkan ramai penyelidik memilih untuk menghasilkan AAO sendiri lantas menjadikan kajian terhadap penghasilan AAO masih rancak dilaporkan (Balde et al 2015;Kikuchi et al 2015;Michalska-Domañska et al 2013;.…”

Section: Pengenalanunclassified

Pembentukan Cekung Berkualiti Tinggi Menggunakan Tempoh Penganodan yang Singkat bagi Penghasilan AAO

Saidin

Jumali²,

Kok

et al. 2016

JSM

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The quality of the AAO membrane prepared using two-step anodization technique is strongly influenced by the pre-textured concave indented during the first-step of anodization. This work was conducted to determine the optimum duration of anodization to produce a high quality of concaves. The anodization process was conducted using 0.3 M H 2 C 2 O 4 solution as an electrolyte at 40 V and 18°C applied voltage and temperature, respectively. Anodizing process was performed up to 6 h. The changes of the current during anodization process was recorded. After removal of the resulting oxide layer, the concaves formed were studied using FESEM. FESEM micrograph confirmed the formation of a uniform hexagonal concaves. Beside improving the uniformity, the extension of anodizing duration formed a well-defined arrangement of concaves with minimum defects. This work found that the optimum period to obtain a uniform and perfect concaves is between 4 and 6 h. This is because the extension of anodizing period caused the wall to collapse and creating larger, irregular pores. In addition, the underlying mechanism for concave formation was described in detail.

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Fabrication of porous anodic aluminium oxide layers on paper for humidity sensors

Cited by 59 publications

References 55 publications

Optical sensors based on polymeric nanofibers layers created by electrospinning

Optical sensors based on polymeric nanofibers layers created by electrospinning

A “Turn‐On” Fluorescence Probe for Selective Detection of Al ³⁺ in Aqueous Environment: Crystal Structure, Theoretical and Cell Imaging Studies

Pembentukan Cekung Berkualiti Tinggi Menggunakan Tempoh Penganodan yang Singkat bagi Penghasilan AAO

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Fabrication of porous anodic aluminium oxide layers on paper for humidity sensors

Cited by 59 publications

References 55 publications

Optical sensors based on polymeric nanofibers layers created by electrospinning

Optical sensors based on polymeric nanofibers layers created by electrospinning

A “Turn‐On” Fluorescence Probe for Selective Detection of Al 3+ in Aqueous Environment: Crystal Structure, Theoretical and Cell Imaging Studies

Pembentukan Cekung Berkualiti Tinggi Menggunakan Tempoh Penganodan yang Singkat bagi Penghasilan AAO

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A “Turn‐On” Fluorescence Probe for Selective Detection of Al ³⁺ in Aqueous Environment: Crystal Structure, Theoretical and Cell Imaging Studies