Chemical sensors based on polymer composites with carbon nanotubes and graphene: the role of the polymer

Salavagione, Horacio J.; Díez‐Pascual, Ana M.; Lázaro, Eduardo; Vera, S.; Gómez‐Fatou, Marian A.

doi:10.1039/c4ta02159b

Cited by 200 publications

(112 citation statements)

References 261 publications

(493 reference statements)

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“…Since the discovery of the band-gap fluorescence of SWCNT in 2002 [16], these nanomaterials have been extensively used for optical sensing, particularly for biological systems. Their fluorescence in the NIR region (between 820 and 1600 nm), inherent photostability and tissue transparency have been exploited in the development of in vitro and in vivo sensors [17][18][19]. In addition, recent studies have demonstrated that SWCNT can act collectively as quenchers for different kinds of fluorophores, such as pyrene, porphyrins, and chromophores [20], via covalent or non-covalent interactions.…”

Section: Introductionmentioning

confidence: 98%

Quenching of fluorene fluorescence by single-walled carbon nanotube dispersions with surfactants: application for fluorene quantification in wastewater

et al. 2015

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The fluorescence of fluorene in aqueous solutions of surfactants of different natures, anionic sodium dodecylsulphate (SDS), cationic cetyltrimethyl ammonium chloride (CTAC) and non-ionic polyoxyethylene-23-lauryl ether (Brij 35), as well as in single-walled carbon nanotube (SWCNT) dispersions in these surfactants, has been studied and compared. A fluorescence quenching phenomenon has been observed in the presence of SWCNT, the effect being stronger for dispersions in CTAC, related to the improved dispersion capability of this surfactant as revealed by microscopic observations and its stronger adsorption onto the SWCNT surfaces as inferred from the Raman spectra. SWCNT interact with fluorene causing a fluorescence quenching. The fluorescence intensity ratio, calculated in the absence and in the presence of SWCNT, follows the SternVolmer equation. For the CTAC concentration that provides the highest quenching effect, the analytical characteristics of the fluorimetric method like sensitivity, detection and quantification limits, repeatability, reproducibility and robustness have been calculated. Results demonstrate that it is possible to determine fluorene in a fortified wastewater sample in aqueous solutions of CTAC and SWCNT/CTAC dispersions, showing recoveries close to 100 %. The quenching effect found in this work could be useful for the development of an optical device that uses SWCNT-based receptors for fluorene detection and quantification in aqueous surfactant solutions.

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Section: Introductionmentioning

confidence: 98%

Quenching of fluorene fluorescence by single-walled carbon nanotube dispersions with surfactants: application for fluorene quantification in wastewater

et al. 2015

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“…Covalent and non-covalent methods have been employed to functionalize CNTs with various materials including polymers (Salavagione et al, 2014), metal oxides (Zhang et al, 2013), metals (Penza et al, 2014) and organometallic complex (Brunet et al, 2012). In particular, the functionalization with metal nanoparticles (NPs) can lead to highly sensitive and selective gas sensors thanks to the extraordinary catalytic properties of the metal NPs (Feldheim and Foss, 2002), as already suggested by several experimental (Khalap et al, 2010), theoretical (Pannopard et al, 2009) and combined (Kauffman et al, 2010) works.…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic deposition of Au NPs on CNT networks for sensitive NO<sub>2</sub> detection

Dilonardo

Penza

Alvisi

et al. 2014

J. Sens. Sens. Syst.

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Abstract. In the present study, Au-surfactant core-shell colloidal nanoparticles (NPs) with controlled dimension and composition were synthesized by sacrificial anode electrolysis. Transmission electron microscopy (TEM) revealed that Au NPs core diameter is between 8 and 12 nm, as a function of the electrosynthesis conditions. Moreover, surface spectroscopic characterization by X-ray photoelectron spectroscopy (XPS) analysis confirmed the presence of nanosized gold phase. Controlled amounts of Au NPs were then deposited electrophoretically on carbon nanotube (CNT) networked films. The resulting hybrid materials were morphologically and chemically characterized using TEM, SEM (scanning electron microscopy) and XPS analyses, which revealed the presence of nanoscale gold, and its successful deposition on CNTs. Au NP/CNT networked films were tested as active layers in a two-pole resistive NO 2 sensor for sub-ppm detection in the temperature range of 100-200 • C. Au NP/CNT exhibited a p-type response with a decrease in the electrical resistance upon exposure to oxidizing NO 2 gas and an increase in resistance upon exposure to reducing gases (e.g. NH 3 ). It was also demonstrated that the sensitivity of the Au NP/CNT-based sensors depends on Au loading; therefore, the impact of the Au loading on gas sensing performance was investigated as a function of the working temperature, gas concentration and interfering gases.

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“…Various biologically-relevant substances/biomaterials such as DNA, blood sugar, other parameters and H 2 O 2 can be detected using Graphene and/ or its composite films [9][10][11][12][13][14][15]. We will discuss GCF based bio-sensors according to their sensing mechanism.…”

Section: Discussionmentioning

confidence: 99%

“…Proteins have charges/dipoles those changes under physiological conditions and this made them suitable for electronic detection of proteins using scattering of field effect [9]. Authors in [26] reported sensor for bacteria detection with very high sensitivity (up to single-cell level).…”

Section: Other Graphene Biosensorsmentioning

confidence: 99%

Bio-Sensing Applications of Graphene Based Composite Films

Maurya¹

2017

IJBSBE

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Graphene based composite materials have been extensively studied for the sensing applications attributing to their 2D structures, high conductivity, controlled modification and large specific surface areas, unique mechanical, optical, chemical, electrical, and catalytic properties. Therefore, a number of high quality sensors have been fabricated in recent years. Graphene based composite films (GCFs) that is base of such sensors can be prepared by combining Graphene with different functional nano-materials (carbon materials, noble metals, polymer materials, metal compounds etc.). In this review, we focus on the recent advances in bio-sensing applications of Graphene based composite films.

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Chemical sensors based on polymer composites with carbon nanotubes and graphene: the role of the polymer

Cited by 200 publications

References 261 publications

Quenching of fluorene fluorescence by single-walled carbon nanotube dispersions with surfactants: application for fluorene quantification in wastewater

Quenching of fluorene fluorescence by single-walled carbon nanotube dispersions with surfactants: application for fluorene quantification in wastewater

Electrophoretic deposition of Au NPs on CNT networks for sensitive NO<sub>2</sub> detection

Bio-Sensing Applications of Graphene Based Composite Films

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Chemical sensors based on polymer composites with carbon nanotubes and graphene: the role of the polymer

Cited by 200 publications

References 261 publications

Quenching of fluorene fluorescence by single-walled carbon nanotube dispersions with surfactants: application for fluorene quantification in wastewater

Quenching of fluorene fluorescence by single-walled carbon nanotube dispersions with surfactants: application for fluorene quantification in wastewater

Electrophoretic deposition of Au NPs on CNT networks for sensitive NO&lt;sub&gt;2&lt;/sub&gt; detection

Bio-Sensing Applications of Graphene Based Composite Films

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Electrophoretic deposition of Au NPs on CNT networks for sensitive NO<sub>2</sub> detection