Adhesion of chemically and electrostatically bound gold nanoparticles to a self-assembled silane monolayer investigated by atomic force volume spectroscopy

Flavel, Benjamin S.; Nussio, Matthew R.; Quinton, Jamie S.; Shapter, Joseph G.

doi:10.1007/s11051-008-9562-1

Cited by 27 publications

(17 citation statements)

References 40 publications

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“…For brevity, we denote this batch as 40 nm AuNP. The amount of NPs strongly depended on exposure time of the APTES‐coated ITO to AuNP solution and on the pH . A saturation coverage of AuNPs on the electrode occurred after approximately 24 h.…”

Section: Resultsmentioning

confidence: 99%

Nanoparticle‐Imprinted Matrices as Sensing Layers for Size‐Selective Recognition of Silver Nanoparticles

2016

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This study extends the concept of nanoparticle‐imprinted matrices (NAIMs) to systems in which template nanoparticles (NPs) are immobilized on a conducting surface and a polymer matrix is built around them before the release of the template NPs. Specifically, citrate‐stabilized AuNPs, 40 nm in diameter, were bound to a 3‐aminopropyltriethoxysilane (APTES)‐modified indium tin oxide (ITO) electrode at pH 5. Subsequently, a polymer matrix was generated by electropolymerization of a self‐inhibiting poly(phenol) (PPh) layer. The template AuNPs were removed either by electro‐oxidation of the Au core during linear sweep voltammetry (LSV) in Cl−‐containing aqueous solution or by chemical oxidation in aqueous KCN solution. After template removal, remaining nanocavities were found to be size‐selective in the competitive reuptake of analyte NPs, as demonstrated by the preference for citrate‐stabilized silver nanoparticles (AgNPs) with 20 nm diameter over AuNPs with 50 nm diameter. The remaining nanocavities and their size‐recognition ability were examined by scanning electron microscopy and LSV. Complementing studies by X‐ray photoelectron spectroscopy and scanning force microscopy corroborated the template embedding, template release, and analyte NP uptake.

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Section: Resultsmentioning

confidence: 99%

Nanoparticle‐Imprinted Matrices as Sensing Layers for Size‐Selective Recognition of Silver Nanoparticles

2016

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“…MPTMS is a commercially available product commonly used as a promoter of adhesion [22][23][24]. Thiol-ene addition is a convenient route to functionalized POSSs and cyclic siloxanes.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of New Polyfunctional Cage Oligosilsesquioxanes and Cyclic Siloxanes by Thiol-ene Addition

Rózga-Wijas

Chojnowski

2012

J Inorg Organomet Polym

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A novel octakis-2{ [3-(trimethoxysilyl)propyl] thio}ethyl-octasilsesqioxane (POSS-M24) was synthesized by radical thiol-ene addition of 3-mercaptopropyltrimethoxysilane, (MPTMS) to octavinyloctasilsesquioxane, (POSS-V8) in the presence of 2,2 0 azobisisobutyronitryl under mild conditions (60°C, toluene solution). Nano-building POSS units bearing both types of groups, 2-[3-(trimethoxysilyl)propylthio]-ethyl and vinyl, pendant to the POSS-cage were obtained by partial addition of MPTMS to the vinyl functions. Finally the thiol-ene addition of MPTMS to 2,4,6-trivinyl-2,4,6-trimethylcyclotrisiloxane (V 3 ) and 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (V 4 ) were explored. The structures of the thiol-ene addition products were confirmed by 29 Si NMR and mass Spectroscopy.

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“…It is based on the attachment of gold nanoparticles to surfaces after silanization. 10 It is applied for nanoparticles of different sizes. The delivery of 10-kDa dextrans is demonstrated.…”

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confidence: 99%

“…10 In a process called silanization, hydroxyl groups on glass replace the alkoxy groups on the silane. This leads to the formation of a covalent ─Si─O─Si─ bond.…”

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confidence: 99%

“…It yields free amino groups, which can electrostatically bind the gold nanoparticles. 10 The binding to the used polystyrene cell culture surfaces (black, clear-bottom 96 well plates, Corning, Pittston, Pennsylvania GmbH) occurs because the surfaces are routinely surface-modified by the manufacturer to enhance cell adhesion. This modification leads to the addition of oxygen containing chemical groups to the surface.…”

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confidence: 99%

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Immobilization of gold nanoparticles on cell culture surfaces for safe and enhanced gold nanoparticle-mediated laser transfection

et al. 2014

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Adhesion of chemically and electrostatically bound gold nanoparticles to a self-assembled silane monolayer investigated by atomic force volume spectroscopy

Cited by 27 publications

References 40 publications

Nanoparticle‐Imprinted Matrices as Sensing Layers for Size‐Selective Recognition of Silver Nanoparticles

Nanoparticle‐Imprinted Matrices as Sensing Layers for Size‐Selective Recognition of Silver Nanoparticles

Synthesis of New Polyfunctional Cage Oligosilsesquioxanes and Cyclic Siloxanes by Thiol-ene Addition

Immobilization of gold nanoparticles on cell culture surfaces for safe and enhanced gold nanoparticle-mediated laser transfection

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