High-aspect-ratio plasma-induced nanotextured poly(dimethylsiloxane) surfaces with enhanced protein adsorption capacity

Vlachopoulou, M. E.; Petrou, Panagiota; Kakabakos, Sotirios; Tserepi, Angeliki; Gogolides, Εvangelos

doi:10.1116/1.3010723

Cited by 27 publications

(35 citation statements)

References 15 publications

(11 reference statements)

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“…PDMS-coated glass slides were treated for 6 min in SF 6 plasma generated in an inductively-coupled plasma (ICP) reactor with a helicon source of 13.56 MHz (Micromachining Etching Tool, MET, from Alcatel), in order to introduce surface nanotexturing [25,26]. Highly anisotropic etching plasma conditions were employed: 1900 W plasma power, −100 V voltage applied on the substrate, and 10 mTorr of SF 6 pressure.…”

Section: Pdms-coated Slides Treatment In Sf 6 Plasmamentioning

confidence: 99%

“…Reactive plasmas have recently been implemented in enhanced protein immobilization on plasma-treated polymer surfaces due to their ability to modify the chemical and topographical nature of the exposed surfaces [24,25]. Previously, we have proposed, a simple plasma-based processing to fabricate nanotextured PDMS substrates, exhibiting enhanced protein adsorption capacity and excellent spot homogeneity [25,26], as well as superhydrophobic-0927-7765/$ -see front matter © 2010 Elsevier B.V. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

“…Previously, we have proposed, a simple plasma-based processing to fabricate nanotextured PDMS substrates, exhibiting enhanced protein adsorption capacity and excellent spot homogeneity [25,26], as well as superhydrophobic-0927-7765/$ -see front matter © 2010 Elsevier B.V. All rights reserved. doi:10.1016/j.colsurfb.2010.11.031 ity when surface nanotexturing was combined with deposition of a hydrophobic coating [27].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Protein arrays on high-surface-area plasma-nanotextured poly(dimethylsiloxane)-coated glass slides

Vlachopoulou¹,

Tserepi²,

Petrou³

et al. 2011

Colloids and Surfaces B: Biointerfaces

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Section: Pdms-coated Slides Treatment In Sf 6 Plasmamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Protein arrays on high-surface-area plasma-nanotextured poly(dimethylsiloxane)-coated glass slides

Vlachopoulou¹,

Tserepi²,

Petrou³

et al. 2011

Colloids and Surfaces B: Biointerfaces

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“…These include the covalent grafting of appropriate molecules onto plasma activated surfaces or the durable adsorption of polyelectrolytes on charged surfaces (as obtained for example after ammonia plasma treatment) [5]. In addition to modification of surface chemical composition, plasma techniques have also been used to modify the surface morphology (roughening) of polymeric surfaces aiming for example at changes in wetting behaviour [6][7][8]. Poly(dimethylsiloxane) (PDMS) is a commercially available type of silicone rubber widely used in the fabrication of medical [9] and microfluidic devices [10], and as foul-release coating to control marine biofouling [11,12].…”

Section: Introductionmentioning

confidence: 99%

Fluorination of poly(dimethylsiloxane) surfaces by low pressure CF4 plasma – physicochemical and antifouling properties

Cordeiro¹,

Nitschke²,

Janke³

et al. 2009

Express Polym. Lett.

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Abstract. Fluorinated surface groups were introduced into poly(dimethylsiloxane) (PDMS) coatings by plasma treatment using a low pressure radio frequency discharge operated with tetrafluoromethane. Substrates were placed in a remote position downstream the discharge. Discharge power and treatment time were tuned to alter the chemical composition of the plasma treated PDMS surface. The physicochemical properties and stability of the fluorine containing PDMS were characterized by X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and contact angle measurements. Smooth PDMS coatings with a fluorine content up to 47% were attainable. The CF4 plasma treatment generated a harder, non-brittle layer at the top-most surface of the PDMS. No changes of surface morphology were observed upon one week incubation in aqueous media. Surprisingly, the PDMS surface was more hydrophilic after the introduction of fluorine. This may be explained by an increased exposure of oxygen containing moieties towards the surface upon re-orientation of fluorinated groups towards the bulk, and/or be a consequence of oxidation effects associated with the plasma treatment. Experiments with strains of marine bacteria with different surface energies, Cobetia marina and Marinobacter hydrocarbonoclasticus, showed a significant decrease of bacteria attachment upon fluorination of the PDMS surface. Altogether, the CF4 plasma treatments successfully introduced fluorinated groups into the PDMS, being a robust and versatile surface modification technology that may find application where a minimization of bacterial adhesion is required.

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“…Due to the nature of anisotropic etching during plasma or ion-beam treatment, a roughened surface forms under the ion or plasma beam; the polymeric surface is uniformly etched by the plasma or ion-beam, except for the region with the local metallic clusters, resulting in high-aspect-ratio nanostructures. [ 16,17 ] However, the co-deposited metals may be regarded as undesired third materials on the nanostructured surfaces because the elements that coat the top or sides of the nanostructures might degrade the surface activity during special applications, such as catalysis or sensing. Thus, to prevent the nanostructures from being co-deposited with undesirable metals, sources should be selected using alternative metals.…”

mentioning

confidence: 99%

Plasma‐Induced Hetero‐Nanostructures on a Polymer with Selective Metal Co‐Deposition

Moon

2014

Adv Materials Inter

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processes. Using ion-beam or plasma treatment, many types of nanostructures, such as nanodots, nanobumps, nanopillars, or nanohairs, can be fabricated without any pre-patterning technique. [ 10 ] These nanostructured surfaces have been used in various applications including superhydrophobic coatings, [ 10,11 ] antirefl ective coatings, [ 12 ] controlled bio-adhesion, [ 13 ] and microfl uidic channels. [ 14 ] Recently, many efforts have been focused on investigating the mechanism of nanostructure formation induced by ion-beam or plasma treatment on various polymeric materials. Some reports have suggested that the differential etching behavior of the polymer phase occurs in the crystalline and amorphous states after plasma treatment or dewetting of the surface layer of polymer beads via the effects of plasma energy. [ 9,15 ] Alternatively, the codeposition or incorporation of a third element originating from a vacuum chamber system forms a hard etching inhibitor on the polymeric surfaces. During the oxygen plasma treatment, reactive ion etching not only forms the volatile species, but it also co-deposits the etching inhibitor simultaneously, inducing a large difference in the etching rate. Due to the nature of anisotropic etching during plasma or ion-beam treatment, a roughened surface forms under the ion or plasma beam; the polymeric surface is uniformly etched by the plasma or ion-beam, except for the region with the local metallic clusters, resulting in high-aspect-ratio nanostructures. [ 16,17 ] However, the co-deposited metals may be regarded as undesired third materials on the nanostructured surfaces because the elements that coat the top or sides of the nanostructures might degrade the surface activity during special applications, such as catalysis or sensing. Thus, to prevent the nanostructures from being co-deposited with undesirable metals, sources should be selected using alternative metals. For example, the nanostructures can incorporate functional metallic units, forming a hetero-nanostructure that can be utilized for catalysts, sensors, energy devices, and templates for nanowire growth. [ 4,5,[18][19][20] In this work, we report a simple method for controlling the nanostructure formation on polymeric surfaces by controlling the co-deposition of metals during the oxygen plasma glow discharge. First, we explored the pattern formation induced by oxygen plasma treatment on polyethylene terephthalate (PET); this popular polymer has various applications, Plasma-induced pattern formation is explored on polyethylene terephthalate (PET) using an oxygen plasma glow discharge. The nanostructures on PET are formed through preferential etching directed by the co-deposition of metallic elements, such as Cr or Fe, sputtered from a stainless-steel cathode. The local islands formed by metal co-deposition have signifi cantly slower etching rates than those of the pristine regions on PET, generating anisotropic nanostructures in pillar-or hair-like form during plasma etching. By covering the cathode with the appropriate...

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High-aspect-ratio plasma-induced nanotextured poly(dimethylsiloxane) surfaces with enhanced protein adsorption capacity

Cited by 27 publications

References 15 publications

Protein arrays on high-surface-area plasma-nanotextured poly(dimethylsiloxane)-coated glass slides

Protein arrays on high-surface-area plasma-nanotextured poly(dimethylsiloxane)-coated glass slides

Fluorination of poly(dimethylsiloxane) surfaces by low pressure CF4 plasma – physicochemical and antifouling properties

Plasma‐Induced Hetero‐Nanostructures on a Polymer with Selective Metal Co‐Deposition

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