A new plasmonic device made of gold nanoparticles and temperature responsive polymer brush on a silicon substrate

Zengi̇n, Adem; Tamer, Uğur; Çaykara, Tuncer

doi:10.1016/j.jcis.2015.02.027

Cited by 13 publications

(5 citation statements)

References 24 publications

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“…Alkoxysilyl groups are useful tools for preparing hybrid composites by forming a bridge between an organic matrix and inorganic surface through [Si-O-Si] covalent bonds. [SiO-R-X]-type molecules are used to modify silicon or silica surfaces (SiO- is an alkoxysilyl group and -X is a halogen group) and, after further modification, can act as initiators for controlled radical polymerization (CRP) methods [20,21] or living anionic polymerization (LAP) [22]. However, LAP, even if conducted at low temperature, is unsuitable for synthesizing alkoxysilyl-functionalized polymers because of the unavoidable side reactions between the alkoxysilyl groups and the living species [18].…”

Section: Resultsmentioning

confidence: 99%

Study on the Mechanism of a Side Coupling Reaction during the Living Anionic Copolymerization of Styrene and 1-(Ethoxydimethylsilyphenyl)-1-phenylethylene (DPE-SiOEt)

Liu

Shen

et al. 2017

Polymers

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A 1,1-diphenylethylene (DPE) derivative with an alkoxysilyl group (DPE-SiOEt) was synthesized. It was end-capped with poly(styryl)lithium (PSLi) and then copolymerized with styrene via living anionic polymerization (LAP) in a non-polar solvent at room temperature. The observed side coupling reaction was carefully investigated by end-capping the polymer. Changes in molecular weight support the plausibility of a mechanism involving living anionic species (PSLi or lithiated DPE-end-capped polystyrene, PSDLi) and the alkoxysilyl groups. Through a series of copolymerizations with different feed ratios, the kinetics of the side coupling reaction were also studied. The results showed that the side reactions could be controlled using an excess feed of DPE-SiOEt, a potentially useful strategy for the synthesis and application of well-defined alkoxysilyl-functionalized polymers via LAP.

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Section: Resultsmentioning

confidence: 99%

Study on the Mechanism of a Side Coupling Reaction during the Living Anionic Copolymerization of Styrene and 1-(Ethoxydimethylsilyphenyl)-1-phenylethylene (DPE-SiOEt)

Liu

Shen

et al. 2017

Polymers

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“…Poly(DEGMA) brushes were synthesized on glass substrates via an interface-mediated RAFT polymerization method according to the literature. − In a typical process, the substrates were first cleaned with ethanol and deionized (DI) water in an ultrasonic bath for 10 min and then dried under nitrogen gas flow. After the pre-cleaning process, they were immersed in piranha solution for 1 h at 70 °C, washed with DI water several times, and dried with nitrogen gas.…”

Section: Methodsmentioning

confidence: 99%

Thermoresponsive Polymer Brush-Decorated 3-D Plasmonic Gold Nanorod Arrays as an Effective Plasmonic Sensing Platform

Hukum

Çaykara

Demirel

2023

ACS Appl. Polym. Mater.

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Molecular sensing based on plasmonic materials is of great interest not only for basic scientific research but also for real-life applications. For plasmonic sensing, tunable hot-spot generation, in which the electromagnetic field is maximized, plays a key role. Herein, we developed a platform consisting of a thermoresponsive polymer brush with colloidal plasmonic particles and 3-D ordered/vertically aligned gold nanorod (AuNR) arrays for surface-enhanced Raman spectroscopy (SERS) applications. Poly(di(ethylene glycol) methyl ether methacrylate) brushes were synthesized via the interface-mediated reversible addition fragmentation chain transfer polymerization method. 3-D AuNR arrays were also fabricated by the oblique angle physical vapor deposition method. Highdensity hot-spot generation on the platforms was achieved by reducing the distance between the plasmonic particles and the underlying AuNR array as a result of phase transition of the polymer brushes. The design and optimization of such a platform will pave the way for molecular detection applications in a broad range of fields such as medicine, environmental protection, food safety, and homeland security.

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“…The chip composed of temperature‐sensitive poly(MEO 2 ‐MA)‐SH and Au NPs was prepared as described in our previous report . Briefly, a CDSP‐immobilized silicon substrate oriented normal to the base of the reactor, MEO 2 ‐MA (150 mmol), free reversible addition‐fragmentation chain transfer (RAFT) agent CDSP (1.2 mmol), initiator AIBN (0.24 mmol), and DMF (35 ml) were put into a glass reactor and degassed by purging with nitrogen for 30 min.…”

Section: Experimental Partmentioning

confidence: 99%

SERS detection of hepatitis B virus DNA in a temperature‐responsive sandwich‐hybridization assay

Zengi̇n

Tamer

Çaykara

2017

J Raman Spectroscopy

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In this study, we report the design of a DNA sensor for the detection of a DNA sequence representative of the hepatitis B virus (HBV) based on a sandwich assay and surface-enhanced Raman scattering (SERS) measurement. The temperature-responsive hybrid silicon substrate was first prepared via immobilization of capture DNA strand at the surface of gold nanoparticles on the hybrid silicon substrate. A sandwich strategy was then applied for the detection of target DNA that brings a reporter DNA labeled with indocyanine green to the proximity of the surface, leading to high SERS signals. The temperature-responsive hybrid silicon substrate-based SERS platform can detect the remarkably lowest HBV DNA concentrations at~0.44 fM at 25°C and~0.14 fM at 37°C, respectively, which are comparable with the lowest HBV DNA concentration ever via other techniques. We expect this highly sensitive and robust hybrid silicon substrate-based SERS platform can be extended to detect other biomolecules and chemical species such as viruses, proteins, and small molecules without any labeling.

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A new plasmonic device made of gold nanoparticles and temperature responsive polymer brush on a silicon substrate

Cited by 13 publications

References 24 publications

Study on the Mechanism of a Side Coupling Reaction during the Living Anionic Copolymerization of Styrene and 1-(Ethoxydimethylsilyphenyl)-1-phenylethylene (DPE-SiOEt)

Study on the Mechanism of a Side Coupling Reaction during the Living Anionic Copolymerization of Styrene and 1-(Ethoxydimethylsilyphenyl)-1-phenylethylene (DPE-SiOEt)

Thermoresponsive Polymer Brush-Decorated 3-D Plasmonic Gold Nanorod Arrays as an Effective Plasmonic Sensing Platform

SERS detection of hepatitis B virus DNA in a temperature‐responsive sandwich‐hybridization assay

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