Fluorescent Patterns by Selective Grafting of a Telechelic Polymer

Kopeć, Maciej; Taş, Sinem; Cirelli, Marco; Pol, Rianne van der; Vries, Ilse de; Vancso, G. Julius; Beer, Sissi de

doi:10.1021/acsapm.8b00180

Cited by 18 publications

(20 citation statements)

References 32 publications

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“…QCM measurements indicate that the sensitivity of mass sensors can be improved by a factor 6 using the PMA brush coatings. The next step will be to graft different brushes on sensor arrays, e.g., by inkjet printing, 44 to explore possibilities for scent recognition via fingerprinting.…”

Section: Discussionmentioning

confidence: 99%

Swelling of Poly(methyl acrylate) Brushes in Acetone Vapor

et al. 2020

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Sensor platforms can benefit from the incorporation of polymer brushes since brushes can concentrate the analyte near the sensor surface. Brushes that absorb acetone vapor are of particular interest since acetone is an important marker for biological processes. We present a simple procedure to synthesize acetone-responsive poly(methyl acrylate) brushes. Using spectroscopic ellipsometry, we show that these brushes respond within seconds and swell by more than 30% when exposed to acetone vapor. Moreover, quartz crystal microbalance measurements demonstrate that the brushes can be exploited to increase the acetone detection sensitivity of sensors by more than a factor 6. Surprisingly, we find that the swelling ratio of the brushes in acetone vapor is independent of the grafting density and the degree of polymerization of the polymers in the brush. This is qualitatively different from swelling of the same brushes in liquid environments, where the swelling ratio decreases for increasing grafting densities. Yet, it indicates that the brushes are robust and reproducible candidates for implementation in vapor sensor systems.

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Section: Discussionmentioning

confidence: 99%

Swelling of Poly(methyl acrylate) Brushes in Acetone Vapor

et al. 2020

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“… [19] This has separately been used for microscopically visualizing patterns. [20] These fluorescence‐based approaches offer strong possibilities towards developing more complex polymer brush surfaces that can noninvasively reveal details on polymer conformation, and ultimately sensing of real‐time changes in aqueous solution compositions.…”

Section: Introductionmentioning

confidence: 99%

FRET‐Integrated Polymer Brushes for Spatially Resolved Sensing of Changes in Polymer Conformation

et al. 2021

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Polymer brush surfaces that alter their physical properties in response to chemical stimuli have the capacity to be used as new surface-based sensing materials.F or such surfaces,d etecting the polymer conformation is key to their sensing capabilities.H erein, we report on FRET-integrated ultrathin (< 70 nm) polymer brush surfaces that exhibit stimuli-dependent FRET with changing brush conformation. Poly(N-isopropylacrylamide) polymers were chosen due their exceptional sensitivity to liquid mixture compositions and their ability to be assembled into well-defined polymer brushes.The brush transitions were used to optically sense changes in liquid mixture compositions with high spatial resolution (tens of micrometers), where the FRET coupling allowed for noninvasive observation of brush transitions around complex interfaces with real-time sensing of the liquid environment. Our methods have the potential to be leveraged towards greater surface-based sensing capabilities at intricate interfaces.

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“…Therefore, the surface modification of SNPs with different polymers to improve their dispersibility in various solvents and extend their physicochemical properties is very essential. It has been proved by researchers’ continuous exploration that SNPs surface modified with organic materials to form silica/polymer core/shell nanohybrids [32,33,34], which also named polymer-modified SNPs (PM-SNPs), have been applied in various areas such as electrical materials and catalysis [35,36,37,38], optical performance [39,40], drug delivery [41,42], chain end fluorescein labeling [43,44] and so on.…”

Section: Introductionmentioning

confidence: 99%

Surface-Induced ARGET ATRP for Silicon Nanoparticles with Fluorescent Polymer Brushes

Yan

Liu

et al. 2019

Polymers

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Well-defined polymer brushes attached to nanoparticles offer an elegant opportunity for surface modification because of their excellent mechanical stability, functional versatility, high graft density as well as controllability of surface properties. This study aimed to prepare hybrid materials with good dispersion in different solvents, and to endow this material with certain fluorescence characteristics. Well-defined diblock copolymers poly (styrene)-b-poly (hydroxyethyl methyl acrylate)–co-poly (hydroxyethyl methyl acrylate- rhodamine B) grafted silica nanoparticles (SNPs-g-PS-b-PHEMA-co-PHEMA-RhB) hybrid materials were synthesized via surface-initiated activators regenerated by electron transfer atom transfer radical polymerization (SI-ARGET ATRP). The SNPs surfaces were modified by 3-aminopropyltriethoxysilane (KH-550) firstly, then the initiators 2-Bromoisobutyryl bromide (BIBB) was attached to SNPs surfaces through the esterification of acyl bromide groups and amidogen groups. The synthetic initiators (SNPs-Br) were further used for the SI-ARGET ATRP of styrene (St), hydroxyethyl methyl acrylate (HEMA) and hydroxyethyl methyl acrylate-rhodamine B (HEMA-RhB). The results indicated that the SI-ARGET ATRP initiator had been immobilized onto SNPs surfaces, the Br atom have located at the end of the main polymer chains, and the polymerization process possessed the characteristic of controlled/“living” polymerization. The SNPs-g-PS-b-PHEMA-co-PHEMA-RhB hybrid materials show good fluorescence performance and good dispersion in water and EtOH but aggregated in THF. This study demonstrates that the SI-ARGET ATRP provided a unique way to tune the polymer brushes structure on silica nanoparticles surface and further broaden the application of SI-ARGET ATRP.

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Fluorescent Patterns by Selective Grafting of a Telechelic Polymer

Cited by 18 publications

References 32 publications

Swelling of Poly(methyl acrylate) Brushes in Acetone Vapor

Swelling of Poly(methyl acrylate) Brushes in Acetone Vapor

FRET‐Integrated Polymer Brushes for Spatially Resolved Sensing of Changes in Polymer Conformation

Surface-Induced ARGET ATRP for Silicon Nanoparticles with Fluorescent Polymer Brushes

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