Electrochemically etched sharp aluminium probes with nanoporous aluminium oxide coatings: demonstration of addressed DNA delivery

Popļausks, Raimonds; Malinovskis, Uldis; Andzane, Jana; Svirksts, Janis; Vīksna, Artūrs; Muižnieks, Indriķis; Erts, Donāts

doi:10.1039/c4ra08509d

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…AAOs which were formed by anodizing Al substrate in an acidic electrolyte, have attracted great interest in diverse fundamental science and industry, for example, hard templates for nanotubes/nanowires 1,2,3,4,5 , energy storage devices 6,7,8,9 , bio-sensing 10,11 , filtering applications 12,13,14 , masks for evaporating and/or etching 15,16,17 , and capacitive humidity sensors 18,19,20,21,22 , owing to their self-ordered honeycomb structure, high aspect ratio of nanopores, and superior mechanical properties 23 . For applying the nanoporous AAOs to these various applications, they should be freestanding forms with a highly and long-range ordered array of nanopores.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Jeong

Park

et al. 2017

JoVE

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After reporting on the two-step anodization, nanoporous anodic aluminum oxides (AAOs) have been widely utilized in the versatile fields of fundamental sciences and industrial applications owing to their periodic arrangement of nanopores with relatively high aspect ratio. However, the techniques reported so far, which could be only valid for mono-surface anodization, show critical disadvantages, i.e., time-consuming as well as complicated procedures, requiring toxic chemicals, and wasting valuable natural resources. In this paper, we demonstrate a facile, efficient, and environmentally clean method to fabricate nanoporous AAOs in sulfuric and oxalic acid electrolytes, which can overcome the limitations that result from conventional AAO fabricating methods. First, plural AAOs are produced at one time through simultaneous multi-surfaces anodization (SMSA), indicating mass-producibility of the AAOs with comparable qualities. Second, those AAOs can be separated from the aluminum (Al) substrate by applying stair-like reverse biases (SRBs) in the same electrolyte used for the SMSAs, implying simplicity and green technological characteristics. Finally, a unit sequence consisting of the SMSAs sequentially combined with SRBs-based detachment can be applied repeatedly to the same Al substrate, which reinforces the advantages of this strategy and also guarantees the efficient usage of natural resources.

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Section: Introductionmentioning

confidence: 99%

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Jeong

Park

et al. 2017

JoVE

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“…[1][2][3][4][5][6][7][8] Aer the report on twostep anodization by Masuda and co-workers, 9,10 it became possible to extend the self-ordering regime owing to the texturing effect of pre-anodization. 3,4,11 Nanoporous anodic aluminum oxides (AAO) with self-assembled periodic honeycomb structures [1][2][3][4][5][6][7] have been intensively studied for their potential as universal templates for various functional nanostructures, 3,[12][13][14][15][16][17][18][19] membrane lters, [20][21][22][23] energy storage devices, [24][25][26][27] bio-applications, [28][29][30] and magnetic memory. 31 However, from the point of view of manufacturing nanoporous templates, conventional AAO fabricating techniques have several disadvantages, including the relatively long time required, the inefficient usage of resources, and their toxicities.…”

Section: Introductionmentioning

confidence: 99%

High-yield and environment-minded fabrication of nanoporous anodic aluminum oxide templates

Hong

Kim

et al. 2015

RSC Adv.

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“…Poplausks et al developed sharp aluminum probes coated with a porous alumina layer to delivery DNA into the cytoplasm of selected plant cells in order to investigate cell communication problems [64]. Law et al reported aluminum wires with diameter 1 mm and a length of 1 cm covered by a porous alumina layer [52], and Gong et al capsules with porous alumina for molecular transport [65].…”

Section: Drug Deliverymentioning

confidence: 99%

Mesoporous alumina as a biomaterial for biomedical applications

Xifré-Pérez

Ferre-Borull

Pallarès

et al. 2015

Open Material Sciences

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Porous anodic alumina (PAA) is a biomaterial based on a cost-effective electrochemical anodization of pure aluminum with unique geometrical properties, i.e., self-ordering hexagonal pore distribution, tunable pore diameters and interpore distances, and uniformity of the pores in the vertical direction (nanochannels). These remarkable properties have found important applications in several fields such as energy storage, optics, photonics, magnetism, catalysis and, in particular, in the biomedicine field. In this work, we review the current state of research and key issues on cell culture and implants, drug delivery systems with complex release profiles and specific action, and high efficiency and sensitivity biosensors with different biosensing mechanisms, all of them based on PAA. The biocompatibility, morphology of the surface, nanoestructural engineering in-depth, surface functionalization and coatings are discussed and analyzed in detail.

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Electrochemically etched sharp aluminium probes with nanoporous aluminium oxide coatings: demonstration of addressed DNA delivery

Cited by 4 publications

References 22 publications

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

High-yield and environment-minded fabrication of nanoporous anodic aluminum oxide templates

Mesoporous alumina as a biomaterial for biomedical applications

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