3D micro-structured arrays of ZnΟ nanorods

Giakoumaki, Argyro N.; Kenanakis, George; Klini, A.; Androulidaki, M.; Viskadourakis, Z.; Farsari, Maria; Selimis, Alexandros

doi:10.1038/s41598-017-02231-z

Cited by 33 publications

(12 citation statements)

References 59 publications

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“…It consists of two scanning systems, which have been described in detail. [27] Both systems use the same irradiation source: a Ti:Sapphire pulsed fs laser operating at 800 nm (Femtolasers Fusion, pulse duration < 20 fs in the sample, repetition rate 80 MHz).…”

Section: D Scaffold Fabrication Using Mplmentioning

confidence: 99%

Laser‐made 3D Auxetic Metamaterial Scaffolds for Tissue Engineering Applications

Flamourakis

Spanos

Vangelatos

et al. 2020

Macro Materials & Eng

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Exploiting the unique properties of three‐dimensional (3D) auxetic scaffolds in tissue engineering and regenerative medicine applications provides new impetus to these fields. Herein, the results on the fabrication and characterization of 3D auxetic scaffolds for tissue engineering applications are presented. The scaffolds are based on the well‐known re‐entrant hexagonal geometry (bowtie) and they are fabricated by multiphoton lithography using the organic−inorganic photopolymer SZ2080. In situ scanning electron microscopy–microindentations and nanoindention experiments are employed to characterize the photocurable resin SZ2080 and the scaffolds fabricated with it. Despite SZ2080 being a stiff material with a positive Poisson’s ratio, the scaffolds exhibit a negative Poisson’s ratio and high elasticity due to their architecture. Next, mouse fibroblasts are used to seed the scaffolds, showing that they can readily penetrate them and proliferate in them, adapting the scaffold shape to suit the cells’ requirements. Moreover, the scaffold architecture provides the cells with a predilection to specific directions, an imperative parameter for regenerative medicine in many cell‐based applications. This research paves the way for the utility of 3D auxetic metamaterials as the next‐generation adaptable scaffolds for tissue engineering.

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Section: D Scaffold Fabrication Using Mplmentioning

confidence: 99%

Laser‐made 3D Auxetic Metamaterial Scaffolds for Tissue Engineering Applications

Flamourakis

Spanos

Vangelatos

et al. 2020

Macro Materials & Eng

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“…The MPL experimental setup employed in these experiments consists of two scanning systems, which from now on will be referred to as the 'Nanocube' system and the 'Galvo' system. Both have been described in detail in [32]. The main difference between them is that in the 'Nanocube' system the laser beam is fixed in a centric position, and 3D writing is achieved by moving the sample using piezoelectric and linear stages (PI), while in the 'Galvo' set-up, the beam moves in the xy plane by galvanometric mirrors, and linear stages are used for z-axis and large-scale movement.…”

Section: Structure Fabricationmentioning

confidence: 99%

A low-autofluorescence, transparent resin for multiphoton 3D printing

Flamourakis

Kordas

Barmparis

et al. 2020

Preprint

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Multiphoton lithography allows the high resolution, free-form 3D printing of structures such as micro-optical elements and 3D scaffolds for Tissue Engineering. A major obstacle in its application in these fields is material and structure autofluorescence. Existing photoresists promise near zero fluorescent in expense of poor mechanical properties, and low printing efficiency. Sudan Black B is a molecular quencher used as a dye for biological studies and as means of decreasing the autofluorescence of polymers. In our study we report the use of Sudan Black B as both a photoinitiator and as a post-fabrication treatment step, using the zirconium silicate SZ2080TM for the development of a non-fluorescent composite. We use this material for the 3D printing of micro-optical elements, and meso-scale scaffolds for Mesenchymal Stem Cell cultures. Our results show the hybrid, made photosensitive with Sudan Black B, can be used for the fabrication of high resolution, highly transparent, autofluorescence-free microstructures.

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“…Another important characteristic is the wide range of morphological diversity of ZnO in nanoscale, varying from nanoparticles, to nanorods, nanowires, nanopins and nanotubes, etc. [ 6 , 7 , 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Properties of Eco-Friendly ZnO Nanostructures on 3D-Printed Polylactic Acid Scaffolds

et al. 2021

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The present paper reports a novel approach for fabrication of eco-friendly ZnO nanoparticles onto three-dimensional (3D)-printed polylactic acid (PLA) scaffolds/structures. Several alcohol-based traditional Greek liquors were used to achieve the corrosion of metallic zinc collected from a typical galvanic anode to obtain photocatalytic active nanostructured ZnO, varying from water, to Greek “ouzo” and “raki”, and pure ethanol, in combination with “Baker’s ammonia” (ammonium bicarbonate), sold worldwide in every food store. The photocatalytic active ZnO nanostructures onto three-dimensional (3D)-printed PLA scaffolds were used to achieve the degradation of 50 ppm paracetamol in water, under UV irradiation. This study provides evidence that following the proposed low-cost, eco-friendly routes for the fabrication of large-scale photocatalysts, an almost 95% degradation of 50 ppm paracetamol in water can be achieved, making the obtained 3D ZnO/PLA structures excellent candidates for real life environmental applications. This is the first literature research report on a successful attempt of using this approach for the engineering of low-cost photocatalytic active elements for pharmaceutical contaminants in waters.

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3D micro-structured arrays of ZnΟ nanorods

Cited by 33 publications

References 59 publications

Laser‐made 3D Auxetic Metamaterial Scaffolds for Tissue Engineering Applications

Laser‐made 3D Auxetic Metamaterial Scaffolds for Tissue Engineering Applications

A low-autofluorescence, transparent resin for multiphoton 3D printing

Photocatalytic Properties of Eco-Friendly ZnO Nanostructures on 3D-Printed Polylactic Acid Scaffolds

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