Plasma Process. Polym. 4/2007

Martin, Ina T.; Dressen, Brian; Boggs, Mark; Yan, Luke; Henry, Charles S.; Fisher, Ellen R.

doi:10.1002/ppap.200790006

Cited by 6 publications

(7 citation statements)

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“…It is therefore envisaged that the direct modification of a PDMS surface inside an enclosed microchannel will simplify the whole process of microfluidic device fabrication and also avoid damaging the modified surfaces during the fabrication processing. Based on this consideration, previous work by Martin et al 12 reported that exposing a sealed microchannel to an Ar, and subsequently an AAc plasma, resulted in a surface with a WCA of 65°, while native PDMS had a WCA of 113°. Tan et al 13 employed a scanning radical microjet approach with an O 2 microplasma to modify PDMS microchannels.…”

Section: Pdms Surface Modification Methodsmentioning

confidence: 92%

“…1. This local plasma activation differed from previous approaches where typically an entire microchannel is exposed to a plasma 12 or plasma microjet 13. In Priest et al's 15 work, the use of patterned electrodes not only localized the plasma spatially by tuning the applied voltage and frequency, but also reduced treatment time.…”

Section: Pdms Surface Modification Methodsmentioning

confidence: 96%

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Surface modification for PDMS‐based microfluidic devices

et al. 2011

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This review focuses on advances reported from April 2009 to May 2011 in PDMS surface modifications for the application in microfluidic devices. PDMS surface modification techniques presented here include improved plasma and graft polymer coating, dynamic surfactant treatment, hydrosilylation-based surface modification and surface modification with nanomaterials such as carbon nanotubes and metal nanoparticles. Recent efforts to generate topographical and chemical patterns on PDMS are also discussed. The described surface modifications not only increase PDMS wettability, inhibit or reduce non-specific adsorption of hydrophobic species onto the surfaces in the act, but also result in the display of desired functional groups useful for molecular separations, biomolecular detection via immunoassays, cell culture and emulsion formation.

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Section: Pdms Surface Modification Methodsmentioning

confidence: 92%

Section: Pdms Surface Modification Methodsmentioning

confidence: 96%

Surface modification for PDMS‐based microfluidic devices

et al. 2011

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“…Such a surface cannot produce a stable electroosmotic flow. There are various ways of modifying the PDMS surface [11][12][13][14]. In this study, we examined two options of chip treatment: (1) oxidation of the PDMS surface in a gas discharge and (2) dynamic modifica tion with surfactants (SDS, sodium deoxycholate, and 1 dodecyl 3 methylimidazolium chloride).…”

Section: Resultsmentioning

confidence: 99%

A microfluidic chip for the determination of polyphenolic antioxidants

2015

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A microfluidic system of capillary electrophoresis with electrochemical detection is developed. The process of manufacturing a chip based on polydimethylsiloxane and glass for the determination of elec troactive compounds is described. We studied the possibilities of the treatment of the chip channel surface in a gas discharge with sodium dodecyl sulfate, sodium deoxycholate, and an ionic liquid of 1 dodecyl 3 trim ethylimidazolium chloride, used as additives to the background electrolyte. It was found that the developed microfluidic system can be used for the determination of polyphenolic antioxidants in green tea and red wine.

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“…Indeed, we have successfully modified a range of different types of substrates, including membranes, 15 16 fibers, 17 18 nanowires, 19 20 particles, 21 and microfluidic channels. 22 With the appropriate monomer selection and plasma parameters, an array of different functionalities can be imparted to a surface, including amine (-NH 2 ), 23 24 alcohol (-OH), 25 and carboxylic acid (-COOH) 23 26 groups. Implantation of hydroxyl groups is of particular interest especially for biological applications as water solubilization is an important step for use under physiological conditions.…”

mentioning

confidence: 99%

Enhancing Surface Functionality of Supported Fe<SUB>2</SUB>O<SUB>3</SUB> Nanoparticles Using Pulsed Plasma Deposition of Allyl Alcohol

Shearer¹,

Fisher²

2013

Nanosci Nanotechnol Lett

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Pulsed plasma enhanced chemical vapor deposition was used to conformally coat supported Fe 2 O 3 nanoparticles using allyl alcohol as a plasma precursor. X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and contact angle measurements reveal lower plasma duty cycles resulted in films with higher oxygen content, greater OH incorporation, and increased hydrophilicity. Actinometric optical emission spectroscopy data show that H atoms, formed via electron impact dissociation of the monomer, dominate the plasma emission at high duty cycles, whereas CH and O are the major emitting species present in lower d.c. plasmas. These results corroborate previously published studies indicating that allyl alcohol decomposes via loss of hydrogen and water. The highly hydrophilic composite magnetic nanomaterials produced at the lowest duty cycles show promise for biomedical applications.The use of composite magnetic nanomaterials in biological applications (i.e., site specific drug delivery, 1 MRI contrast agents 2 ) has grown rapidly in recent years. 3 Using nanoparticles in biomedical applications presents several challenges including concerns regarding the potential toxicity of nanoparticles in both biological systems and the environment. 4 A potential solution to this issue is creation of a barrier film on the nanoparticle surface. Additionally, for nanoparticles to be the most effective in the widest range of potential applications, a critical need exists for the ability to specifically adjust particle surface chemistry. 5 Indeed, nanoparticle interactions with their environment (e.g., a biological system) are directly tied to the type of chemistry that can occur at the nanoparticle surface. 6 Thus, optimal nanoparticle performance can be realized by tailoring surface functionality and properties such as wetting (hydrophilicity), protein and drug attachment, and surface energy. 7 8 Plasma processing for the production of biocompatible nanomaterials and tailoring of surface properties provides an alternative to traditional wet chemical surface modification strategies that could damage or destroy nanostructured materials. 3 Use of pulsed plasma power for plasma polymerization schemes provides additional * Author to whom correspondence should be addressed. protection from substrate damage and has been shown to increase monomer retention in the deposited films. 9-14 Moreover, plasma polymerization offers virtually no limitations on monomer selection, does not require high substrate temperatures, and can involve almost any type and size of substrate. Indeed, we have successfully modified a range of different types of substrates, including membranes, 15 16 fibers, 17 18 nanowires, 19 20 particles, 21 and microfluidic channels. 22 With the appropriate monomer selection and plasma parameters, an array of different functionalities can be imparted to a surface, including amine (-NH 2 ), 23 24 alcohol (-OH), 25 and carboxylic acid (-COOH) 23 26 groups. Implantation of hydroxyl groups is of particular interest esp...

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Plasma Process. Polym. 4/2007

Cited by 6 publications

References 0 publications

Surface modification for PDMS‐based microfluidic devices

Surface modification for PDMS‐based microfluidic devices

A microfluidic chip for the determination of polyphenolic antioxidants

Enhancing Surface Functionality of Supported Fe<SUB>2</SUB>O<SUB>3</SUB> Nanoparticles Using Pulsed Plasma Deposition of Allyl Alcohol

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