Plasma directed assembly and organization: bottom-up nanopatterning using top-down technology

Vourdas, N.; Kontziampasis, Dimitrios; Kokkoris, George; Constantoudis, Vassilios; Goodyear, Andy; Tserepi, Angeliki; Cooke, Mike; Gogolides, Εvangelos

doi:10.1088/0957-4484/21/8/085302

Cited by 57 publications

(50 citation statements)

References 33 publications

(35 reference statements)

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“…However, the role of the etch inhibitors is not limited to the roughness instability. Experimental results (29) show that ordered periodic morphologies can be induced on plasma etched polymeric surfaces. Thus, what is different in plasma directed assembly and organization is that the control of the ratios of ions/neutrals/inhibitors as well as the selectivities and etching yields allows control of the order, the height, and the spacing of the formed nanostructures.…”

Section: What Is Different In Plasma Nanotexturing and Plasma Organizmentioning

confidence: 96%

“…Very recently we have demonstrated that plasma etching alone can be used for plasma directed organization to BOTH create the organized nanodot pattern on any nonspecialty commercial polymer, and then transfer it to the substrate (28) (29) . This finding has promoted plasma etching, an inherently top-down technology also as a bottom-up nanomanufacturing tool.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Controlling roughness: from etching to nanotexturing and plasma-directed organization on organic and inorganic materials

Gogolides¹,

Constantoudis²,

Kokkoris³

et al. 2011

J. Phys. D: Appl. Phys.

116

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We describe how plasma-wall interactions in etching plasmas lead to either random roughening / nanotexturing of polymeric and Silicon surfaces, or formation of organized nanostructures on such surfaces. We conduct carefully designed experiments of plasma-wall interactions to understand the causes of both phenomena, and present Monte-Carlo simulation results confirming the experiments. We discuss emerging applications in wetting and optical property control, protein adsorption, microfluidics and lab-on-a-chip fabrication and modification, and cost-effective silicon mold fabrication. We conclude with an outlook on the plasma reactor future designs to take advantage of the observed phenomena for new micro and nanomanufacturing processes.

show abstract

Section: What Is Different In Plasma Nanotexturing and Plasma Organizmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Controlling roughness: from etching to nanotexturing and plasma-directed organization on organic and inorganic materials

Gogolides¹,

Constantoudis²,

Kokkoris³

et al. 2011

J. Phys. D: Appl. Phys.

116

View full text Add to dashboard Cite

show abstract

“…It can be used as a deposition tool for a variety of coatings, or it can increase the surface of the nanofibers by graphitization [161]. Due to its nature, plasma also creates nanostructuring on surfaces either due to etching or due to deposition [159][160] [162][164] [165], so it can also be a tool for the reconstruction of the desired micro/nanoenvironment that mimics the cardiac ECM. Finally, an additional advantage is the UV irradiation that plasma creates by default and is a benefit on the decontamination of surfaces.…”

Section: Post Treatment By Plasma Modificationmentioning

confidence: 99%

Fibers for hearts: A critical review on electrospinning for cardiac tissue engineering

et al. 2017

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Please cite this article as: Kitsara, M., Agbulut, O., Kontziampasis, D., Chen, Y., Menasché, P., Fibers for hearts: A critical review on electrospinning for cardiac tissue engineering, Acta Biomaterialia (2016), doi: http://dx.doi.org/ 10. 1016/j.actbio.2016.11.014 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractCardiac cell therapy holds a real promise for improving heart function and especially of the chronically failing myocardium. Embedding cells into 3D biodegradable scaffolds may better preserve cell survival and enhance cell engraftment after transplantation, consequently improving cardiac cell therapy compared with direct intramyocardial injection of isolated cells.The primary objective of a scaffold used in tissue engineering is the recreation of the natural 3D environment most suitable for an adequate tissue growth. An important aspect of this commitment is to mimic the fibrillar structure of the extracellular matrix, which provides essential guidance for cell organization, survival, and function. Recent advances in nanotechnology have significantly improved our capacities to mimic the extracellular matrix. Among them, electrospinning is well known for being easy to process and cost effective. Consequently, it is becoming increasingly popular for biomedical applications and it is most definitely the cutting edge technique to make scaffolds that mimic the extracellular matrix for industrial applications.Here, the desirable physico-chemical properties of the electrospun scaffolds for cardiac therapy are described, and polymers are categorized to natural and synthetic. Moreover, the methods used for improving functionalities by providing cells with the necessary chemical cues and a more in vivo-like environment are reported.

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“…In nanotechnology to have an assessment of the different kinds of deviations from periodicity can be critical since they may be related to different fabrication conditions and/or surface functionalities [8][9]. Oxygen plasma etching in a plasma reactor [10,11]. (a) Top-down image and b) magnification 3D topography…”

Section: Characterization Of Almost Periodic Nanostructures: Period-smentioning

confidence: 99%

Computational nanometrology of nanostructures: the challenge of spatial complexity

Constantoudis

Poulios

Chatzigeorgiou

et al. 2017

18th International Congress of Metrology

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Several applications of nanotechnology are based on the surface nanopatterning of materials and the new functionalities it brings about. Not surprisingly, the novel material properties are tightly linked to nanostructure morphology and very sensitive to its geometrical characteristics. Therefore, the measurement and characterization of nanostructure morphology is very critical in order to get control of the added value of nanopatterning on material properties and functionalities. In other words, there is an emergent need for accurate and concise metrology of all kinds of nanostructures.Up to now, the main tools for imaging and measuring the nanostructures are the well-known and widely used probe microscopes (AFM, SEM, TEM). However, due to the minute size of the measured structures, the measurement results are strongly dependent on the effects of measuring device and process. In order to get as more accurate measurement as possible, it is necessary to deconvolute the true structure from the effects of measurement. This can be made through the development and implementation of mathematical modeling methods able to get control of the measurement effects on the result and aid the acquisition of the true morphology. Furthermore, novel mathematical and computational methods are required in the characterization of complex surface nanostructures created by deposition, etching, ion bombardment or laser treatment of surfaces. The mathematical and computational methods needed to aid the accurate and complete metrology of surface nanostructures are collectively defined by the term computational nanometrology.In this paper, first we shortly introduce the field of computational nanometrology and define its content. Then we focus on two specific applications to demonstrate the benefits of computational nanometrology. In the first, a new mathematical transform is proposed to enable the simultaneous characterization of both periodicity and feature width in almost periodic arrangements of nanodots on a surface. In the second, the multifractal spectrum of complex nanomorphologies is calculated to quantify their multiscale hierarchical structuring. Both methodologies are motivated and applied to the characterization of polymer surfaces after their treatment in plasma reactors.

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Plasma directed assembly and organization: bottom-up nanopatterning using top-down technology

Cited by 57 publications

References 33 publications

Controlling roughness: from etching to nanotexturing and plasma-directed organization on organic and inorganic materials

Controlling roughness: from etching to nanotexturing and plasma-directed organization on organic and inorganic materials

Fibers for hearts: A critical review on electrospinning for cardiac tissue engineering

Computational nanometrology of nanostructures: the challenge of spatial complexity

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