Poly(2‐(dimethylamino)ethyl methacrylate) Brushes with Incorporated Nanoparticles as a SERS Active Sensing Layer

Gupta, Seema; Agrawal, Mukesh; Conrad, Marc; Hutter, Naima A.; Olk, Phillip; Simon, Frank; Eng, Lukas M.; Stamm, Manfred; Jordan, Rainer

doi:10.1002/adfm.201000025

Cited by 102 publications

(87 citation statements)

References 53 publications

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“…22 Among them, the use of host−guest interaction allows the arrangement of metal NPs to the polymers with good stability and controllable uniform size, and a lot of studies have been reported about the host−guest interaction between noble metal NPs and polymers. 19,23−26 Cyclodextrin capped NPs is favored for its facile preparation, which are usually used to fabricate supramolecular aggregates by self-assembly of CD capped NPs and polymers.…”

Section: ■ Introductionmentioning

confidence: 99%

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Tunable Polymer Brush/Au NPs Hybrid Plasmonic Arrays Based on Host–guest Interaction

Fang

Chen

et al. 2014

ACS Appl. Mater. Interfaces

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The fabrication of versatile gold nanoparticle (Au NP) arrays with tunable optical properties by a novel host-guest interaction are presented. The gold nanoparticles were incorporated into polymer brushes by host-guest interaction between β-cyclodextrin (β-CD) ligand of gold nanoparticles and dimethylamino group of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA). The gold nanoparticle arrays were prepared through the template of PDMAEMA brush patterns which were fabricated combining colloidal lithography and surface-initiated atom-transfer radical polymerization (SI-ATRP). The structure parameters of gold nanoparticle patterns mediated by polymer brushes such as height, diameters, periods and distances, could be easily tuned by tailoring the etching time or size of colloidal spheres in the process of colloidal lithography. The change of optical properties induced by different gold nanoparticle structures was demonstrated. The direct utilization of PDMAEMA brushes as guest avoids a series of complicated modification process and the PDMAEMA brushes can be grafted on various substrates, which broaden its applications. The prepared gold naoparticle arrays are promising in applications of nanosensors, memory storage and surface enhanced spectroscopy.

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Section: ■ Introductionmentioning

confidence: 99%

“…22 Among them, the use of host−guest interaction allows the arrangement of metal NPs to the polymers with…”

Section: ■ Introductionmentioning

confidence: 99%

Tunable Polymer Brush/Au NPs Hybrid Plasmonic Arrays Based on Host–guest Interaction

Fang

Chen

et al. 2014

ACS Appl. Mater. Interfaces

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“…40 °C, at which the transmittance drops abruptly. [ 3 ] Above the LCST, the size of PDMAEMA-g -PDA microcapsules is slightly smaller than the size below the LCST. The differences can be attributed to the hydrophobic PDMAEMA, which improves the hydrophilicity of the microenvironment surrounding the microcapsule particles.…”

Section: Resultsmentioning

confidence: 98%

Mussel‐Inspired Photografting on Colloidal Spheres: A Generalized Self‐Template Route to Stimuli‐Responsive Hollow Spheres for Controlled Pesticide Release

Sheng

et al. 2015

Macromol. Rapid Commun.

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A thermo-controlled pesticide release system composed of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) thin film grafted polydopamine (PDA) (PDMAEMA-g-PDA) microcapsules is reported. SiO2 microparticles are used as a template to prepare PDA-coated SiO2 microparticles. The thermally-responsive PDMAEMA thin films are grafted on PDA surfaces using a metal-free surface-initiated photopolymerization approach without adding any photo-initiator or photosensitizer under UV light irradiation. The subsequent acid etching yields PDMAEMA-g-PDA hollow microcapsules. PDMAEMA-g-PDA microcapsules exhibit well-controlled release of avermectin (Av). The results show that the loading ability of PDMAEMA-g-PDA microcapsules of Av is up to 52.7% (w/w). The release kinetics of Av demonstrate that Av@PDMAEMA-g-PDA microcapsules exhibit temperature-controlled release performance. This work is significant for controlled release systems. This simple design is expected to be used in various applications, such as in controlled drug release and agriculture-related fields.

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“…As this Raman peak have no adverse impacts to the SERS signal of analytes, PDMS could be a feasible supporting material for SERS substrates. In order to quantitatively study the SERS enhancement ability of the AgNL/PDMS substrates, the enhancement factors (EF) were estimated according to the equation EF = (I SERS /I NR )(C NR /C SERS ) [24,25]. Normal Raman signals of R6G (1×10 −2 mol L −1 ) were obtained using the same hemispherical dimple without SERS substrate and the EFs were calculated at the main peaks of 1361, and 1648 cm −1 (SI, S6).…”

Section: Resultsmentioning

confidence: 99%

Flexible SERS active detection from novel Ag nano-necklaces as highly reproducible and ultrasensitive tips

et al. 2016

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Surface-enhanced Raman scattering (SERS) spectroscopy has been considered as a promising way to realize real-time, in-situ and ultrasensitive analysis of chemoand biochemical molecules in different applications even in intracellular or aqueous environments. In this work, polymer-supported novel Ag nano-necklaces (AgNLs) as flexible SERS substrates were fabricated for ultrasensitive chemical and biological detection. With the stringing of dense "hot spot" in three-dimension, AgNLs located on polydimethylsiloxane (PDMS) work like the removable and reusable "tip" on the surface of analytes with different morphologies and conditions. The novel substrate shows ultra-high enhancement factor (as high as 10 9 ) with excellent reproducibility and long-term stability (7 months) in an aqueous environment. With further functionalizing with p-mercaptobenzoic acid, AgNLs/PDMS elastomer also reveals sensitive and consistent pH detection ability over the wide range of pH 4.0-9.0, indicating their wide applications in biological and environmental fields. This work provides a feasible strategy for designing ultrasensitive, reproducible and flexible SERS substrate for practical detection.

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Poly(2‐(dimethylamino)ethyl methacrylate) Brushes with Incorporated Nanoparticles as a SERS Active Sensing Layer

Cited by 102 publications

References 53 publications

Tunable Polymer Brush/Au NPs Hybrid Plasmonic Arrays Based on Host–guest Interaction

Tunable Polymer Brush/Au NPs Hybrid Plasmonic Arrays Based on Host–guest Interaction

Mussel‐Inspired Photografting on Colloidal Spheres: A Generalized Self‐Template Route to Stimuli‐Responsive Hollow Spheres for Controlled Pesticide Release

Flexible SERS active detection from novel Ag nano-necklaces as highly reproducible and ultrasensitive tips

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