Aminohydroxysiloxanes on E-Glass Fibers

Arora, Pawittar S.; Matisons, Janis G.; Provatas, Arthur; Smart, Roger St. C.

doi:10.1021/la00006a030

Cited by 22 publications

(15 citation statements)

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“…4a and c). The peak at 1,400 cm −1 could be assigned to CaO, a component of the glass slide, consistent with reported data [64]. Figure 4, curves 2-4 show a significant change in the 800 to 1,200 cm −1 region and peaks at~1,076 and~960 cm −1 arise from Si-O-Si and Si-OH bonds respectively from newly formed silica on the surface [65].…”

Section: Silica Film Formation Studysupporting

confidence: 88%

Fabrication of Tuneable Thickness Silica Films on Solid Surfaces Using Amines and Proteins

Rai

Perry

2009

Silicon

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We report an elegant and simple method to fabricate silica films with controlled thickness and roughness using protein coated solid surfaces as substrates. Bovine serum albumin (BSA) and lysozyme having different inherent charges have been used as model proteins (templates) to fabricate silica films. The formation of silica films was achieved by immobilization of BSA and lysozyme on amine (poly(allylamine) (PAH), poly(ethyleneimine) (PEI) and octadecyl amine (ODA)), coated surfaces, followed by treatment with silica precursors (tetramethoxysilane) under environmentally benign conditions of pH and temperature. BSA adsorbs strongly on hydrophilic surfaces (PAH and PEI coated) via electrostatic interaction, while lysozyme shows greater affinity towards hydrophobic surfaces (ODA coated) via largely hydrophobic interactions. The thickness (12-60 nm) and roughness of the films (1.30-3.75 nm) could be tuned by varying the amount of the adsorbed proteins on the amine-coated surfaces. This simple route to prepare silica films of controlled thickness could have potential application in membrane fabrication, biomedical devices, biosensors and next generation electronic components.

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Section: Silica Film Formation Studysupporting

confidence: 88%

Fabrication of Tuneable Thickness Silica Films on Solid Surfaces Using Amines and Proteins

Rai

Perry

2009

Silicon

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“…In the N1 sspectrum on glass, an additional peak was observed at 406.9 eV,w hich is consistent with the presence of ap rotonated amine species on or near the silicate surface ( Figure 3e). Such ap rotonated amine peak is consistentw ith ap rotonated amine peak previouslyo bserved [16,17] along with the variety of binding modes exhibited by aminosilanes on hydroxylated silica substrates. [18] AS i ÀOb inding energy differenceo fg reater than 429.6 eV on glass is consistentw ith complete silane coverage, while ab inding energy difference of less than 429.6 eV suggests al ack of uniforms ilane coverage with the underlying glass silicate structure being exposed.…”

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confidence: 85%

Surface‐Triggered Tandem Coupling Reactions of Cyclic Azasilanes

Pan

Annalese

Min

et al. 2017

Chemistry An Asian Journal

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Cyclic azasilanes have been synthesized for the purpose of developing coupling agents appropriate for a variety of nanotechnologies including surface modification of nanoparticles, nanocrystals, mesoporous materials and substrates. N‐Methyl‐aza‐2,2,4‐trimethylsilacyclopentane is representative of this class of compounds. Preliminary data for the treatment of inorganic surfaces, including nanoparticles and oxidized silicon wafers, with cyclic azasilanes suggest high‐density monolayer deposition by a ring‐opening reaction. Cyclic azasilanes contain a cryptic amine functionality that can perform a subsequent tandem coupling reaction with functional molecules after the surface‐triggered ring‐opening reaction, allowing for a one‐pot self‐assembly route on nanostructures. Tandem coupling reactions are demonstrated via addition reactions of the cryptic amine with epoxy and acrylate systems.

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“…The adsorption mechanism of APS on glass surfaces has been extensively studied [10][11][12][13][14]. In addition to the siloxane (Si-O-Si) linkages [10], very strong hydrogen bonds between amino groups of the silanes and the surface silanol groups are formed [15]. The H-bonding has been proved using FTIR [11], 13 C MAS NMR [12], and X-ray photoelectron spectroscopies [13,14].…”

Section: Introductionmentioning

confidence: 99%