Transformation of poly(dimethylsiloxane) into thin surface films of SiOx by UV/ozone treatment. Part II: segregation and modification of doped polymer blends

Matienzo, Luis J.; Egitto, Frank D.

doi:10.1007/s10853-006-0713-4

Cited by 13 publications

(12 citation statements)

References 26 publications

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“…UV light with a maximum emission at 254 nm can be used to cleave the bonds of organic molecules on surfaces. − Strong emission at 185 nm converts atmospheric oxygen into reactive ozone, which in turn attacks the methyl groups and creates volatile organics. In this case, the −CH 3 group of the silicon polymer is oxidized to −COOH, −COH, or −OH, resulting in a chemically modified, hydrophilic, silicalike layer on the top of the polymer substrate. − This fact has already been studied by Genzer, Chaudhury, , Ferguson, and others, and they already used silanes for coupling to polymeric substrates, whereupon the hydroxyl groups are used for the coupling to the ITC-terminated silane.…”

Section: Resultsmentioning

confidence: 99%

New Approaches for Bottom-Up Assembly of Tobacco Mosaic Virus-Derived Nucleoprotein Tubes on Defined Patterns on Silica- and Polymer-Based Substrates

Azucena¹,

Eber

Trouillet³

et al. 2012

Langmuir

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The capability of some natural molecular building blocks to self-organize into defined supramolecular architectures is a versatile tool for nanotechnological applications. Their site-selective integration into a technical context, however, still poses a major challenge. RNA-directed self-assembly of tobacco mosaic virus-derived coat protein on immobilized RNA scaffolds presents a possibility to grow nucleoprotein nanotubes in place. Two new methods for their site-selective, bottom-up assembly are introduced. For this purpose, isothiocyanate alkoxysilane was used to activate oxidic surfaces for the covalent immobilization of DNA oligomers, which served as linkers for assembly-directing RNA. Patterned silanization of surfaces was achieved (1) on oxidic surfaces via dip-pen nanolithography and (2) on polymer surfaces (poly(dimethylsiloxane)) via selective oxidization by UV-light irradiation in air. Atomic force microscopy and X-ray photoelectron spectroscopy were used to characterize the surfaces. It is shown for the first time that the combination of the mentioned structuring methods and the isothiocyanate-based chemistry is appropriate (1) for the site-selective immobilization of nucleic acids and, thus, (2) for the formation of viral nanoparticles by bottom-up self-assembly after adding the corresponding coat proteins.

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Section: Resultsmentioning

confidence: 99%

New Approaches for Bottom-Up Assembly of Tobacco Mosaic Virus-Derived Nucleoprotein Tubes on Defined Patterns on Silica- and Polymer-Based Substrates

Azucena¹,

Eber

Trouillet³

et al. 2012

Langmuir

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“…S2 †), a 10% reduction in lm mass is observed, suggesting that UV/ozone treatment does not completely remove the coatings, but modies it into SiO x . 16,31 The regeneration of TMSC into cellulose is clearly visible from the uorescence signal as a result of TRITC binding (Fig. 5D).…”

Section: Spatial Structuring Of Pdms Surfaces With Cellulose/ Tmsc Co...mentioning

confidence: 96%

“…This method relies on the exposure of mask-covered PDMS surfaces to UV/ozone, which renders the surfaces hydrophilic. 15,16 However, the UV treated surfaces are unstable and regain their hydrophobicity with time. 17 This hydrophobic recovery is a well-known problem in polymer surface modication and especially pronounced for PDMS due to its low glass transition temperature.…”

Section: Introductionmentioning

confidence: 99%

Preparation of PDMS ultrathin films and patterned surface modification with cellulose

et al. 2014

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“…4 In thin films, polydimethylsiloxane (PDMS) is converted to silica by treatment with oxygen plasma or ultraviolet/ozone. 5 The concurrent removal of the opposing block, such as PS, produces topographically patterned silica. 4,[6][7][8] One area for development in these PDMS-containing polymers is broadening the range of available block copolymer chemistries.…”

Section: Introductionmentioning

confidence: 99%

“…At larger molecular weights, the large χ parameters lead to narrow interfacial widths, which is important for controlling the line edge roughness of the patterns 4. In thin films, polydimethylsiloxane (PDMS) is converted to silica by treatment with oxygen plasma or ultraviolet/ozone 5. The concurrent removal of the opposing block, such as PS, produces topographically patterned silica 4, 6–8.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of polydimethylsiloxane‐containing block copolymers via reversible addition fragmentation chain transfer (RAFT) polymerization

Wadley¹,

Cavicchi²

2009

J of Applied Polymer Sci

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Low polydispersity polydimethylsiloxane (PDMS) was end functionalized with a reversible addition fragmentation chain transfer (RAFT) agent by the esterification of hydroxyl terminated PDMS with a carboxylic acid functional RAFT agent. These PDMS-RAFT agents were able to control the free radical polymerization of styrene and substituted styrene monomers to produce PDMScontaining block copolymers with low polydispersities and targeted molecular weights. A thin film of polydimethylsiloxane-block-polystyrene was prepared by spin coating and exhibited a microphase separated morphology from scanning force microscopy measurements. Controlled swelling of these films in solvent vapor produced morphologies with significant long-range order. This synthetic route will allow the straightforward production of PDMS-containing block copolymer libraries that will be useful for investigating their thin film morphological behavior, which has applications in the templating of nanostructured materials.

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Transformation of poly(dimethylsiloxane) into thin surface films of SiOx by UV/ozone treatment. Part II: segregation and modification of doped polymer blends

Cited by 13 publications

References 26 publications

New Approaches for Bottom-Up Assembly of Tobacco Mosaic Virus-Derived Nucleoprotein Tubes on Defined Patterns on Silica- and Polymer-Based Substrates

New Approaches for Bottom-Up Assembly of Tobacco Mosaic Virus-Derived Nucleoprotein Tubes on Defined Patterns on Silica- and Polymer-Based Substrates

Preparation of PDMS ultrathin films and patterned surface modification with cellulose

Synthesis of polydimethylsiloxane‐containing block copolymers via reversible addition fragmentation chain transfer (RAFT) polymerization

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