Dramatic increase in the Raman signal of functional groups on carbon nanotube surfaces

Andrada, Daniel; Vieira, Henriete S.; Oliveira, Marcela M.; Santos, Adelina P.; Saito, Riichiro; Pimenta, M. A.; Fantini, C.; Furtado, Clascídia Aparecida

doi:10.1016/j.carbon.2013.01.022

Cited by 10 publications

(13 citation statements)

References 46 publications

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“…Raman spectroscopy is an excellent method for analyzing the structures and properties of various carbon materials, including active carbon [44], carbon nanotubes [45,46], and mesoporous carbon [47,48]. In addition to the two well-known crystalline structures of natural carbon materials, diamond and graphite, there is a wide range of carbons with disordered forms.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Inorganic Silver and Palladium Nanostructures within Hexagonal Cylindrical Channels of Mesoporous Carbon

Tsai

Kuo

2014

Polymers

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Abstract:In this study, we prepared a mesoporous carbon with hexagonally packed mesopores through evaporation-induced self-assembly (EISA)-with the diblock copolymer poly(ethylene oxide-b-ε-caprolactone) (PEO-b-PCL) as the template (EO 114 CL 84 ), phenolic resin as the carbon precursor, hexamethylenetetramine (HMTA) as the curing agent, and star octakis-PEO-functionalized polyhedral oligomeric silsesquioxane (PEO-POSS) as the structure modifier-and subsequent carbonization. We then took the cylindrical mesoporous carbon as a loading matrix, with AgNO 3 and Pd(NO 3 ) 2 as metal precursors, to fabricate Ag nanowire/mesoporous carbon and Pd nanoparticle/mesoporous carbon nanocomposites, respectively, through an incipient wetness impregnation method and subsequent reduction under H 2 . We used transmission electron microscopy, electron diffraction, small-angle X-ray scattering, N 2 isotherm sorption experiment, Raman spectroscopy, and power X-ray diffraction to investigate the textural properties of these nanometal/carbon nanocomposites. Most notably, the Raman spectra of the cylindrical mesoporous carbon, Ag/mesoporous carbon, and Pd/mesoporous carbon revealed interesting phenomena in terms of the ratios of the intensities of the D and G bands (I D /I G ), the absolute scattering intensities, and the positions of the D bands.

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Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Inorganic Silver and Palladium Nanostructures within Hexagonal Cylindrical Channels of Mesoporous Carbon

Tsai

Kuo

2014

Polymers

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“…(1); (c) de-excitation of the CN-TLS system by means of the scattered (Raman) photon emission of the frequency ω s with the unit polarization vector e s , described by the interaction matrix element n|Ĥ R (ω i )|0 † | i→s in accordance with Eq. (10).…”

Section: Raman Scattering Cross-sectionmentioning

confidence: 99%

“…Only very recently, the chemical SERS effect with CNs alone, without any combination with metallic nanoparticles, was first reported by Andrada et al in [10], where molecules covalently bound to single wall CNs demonstrated the resonantly increased Raman signal that was even stronger than that of the nanotube itself.…”

Section: Introductionmentioning

confidence: 98%

“…High scattering intensities within narrow spectral bands reduce the probability for spectral overlapping to allow for better recognition of multiple markers, making SERS one of the most efficient optical sensing techniques. With the development of advanced nanomaterials, various SERS substrates are demonstrated [4][5][6][7][8][9][10]. However, there is still a need for inexpensive substrates of improved sensitivity and signal reproducibility, which require clear understanding of the underlying scattering mechanisms to be developed.…”

Section: Introductionmentioning

confidence: 99%

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Plasmon enhanced Raman scattering effect for an atom near a carbon nanotube

Bondarev¹

2015

Opt. Express

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Abstract:Quantum electrodynamics theory of the resonance Raman scattering is developed for an atom in a close proximity to a carbon nanotube. The theory predicts a dramatic enhancement of the Raman intensity in the strong atomic coupling regime to nanotube plasmon near-fields. This resonance scattering is a manifestation of the general electromagnetic surface enhanced Raman scattering effect, and can be used in designing efficient nanotube based optical sensing substrates for single atom detection, precision spontaneous emission control, and manipulation.

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“…[14] Recently, there have been multiple discussions about the ability and mechanism of graphene and its derivatives to act as a SERS substrate, a phenomenon known as GERS (grapheneenhanced Raman spectroscopy). [15][16][17] The interesting mechanism of the chemical enhancement of graphene is still not fully understood and there is ongoing debate among the scientific community around the explanation of the GERS phenomenon. Although the GERS enhancement factor (EF) is ,10-10 2 , it has been able to detect concentrations as low as 2 Â 10 À8 and 8 Â 10 À10 M for protoporphyrin IX (PPP) and rhodamine 6G (R6G) respectively, as demonstrated by the work of Ling et al [18] These encouraging detection limits are providing a good challenge to the regular well-known substrates that have been used as SERS surfaces for a long time.…”

Section: Introductionmentioning

confidence: 99%

Can r-graphene oxide replace the noble metals in SERS studies: the detection of acrylamide

Segal

Gedanken

2016

Environ. Chem.

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Environmental context. The need for detecting and sensing hazardous materials that can contaminate our food and water is growing each and every year. Regulation of these contaminants to safeguard human health depends on the ability to detect them at ultra-low concentrations in the environment. This work proposes a simple and efficient substrate preparation for detecting acrylamide, a toxic and carcinogenic material usually found in drinking water.Abstract. Polyacrylamide acts as a very common water purifier worldwide. Unfortunately, it leaves hazardous and toxic residues of its monomer, acrylamide (C 3 H 5 NO), in water sources. The World Health Organization (WHO), the Food and Agriculture Organisation of the United Nations (FAO) and the European Union (EU) set the maximum contaminant level of acrylamide in drinking water to 0.1-0.5 mg L À1 . This environmental risk encouraged our efforts to develop surfaceenhanced Raman spectroscopy (SERS) probes that are easy and simple to fabricate, and also have superb detection ability. We report down to 0.071-mg L À1 acrylamide detection with good reproducibility, which is even lower than the WHO, FAO and EU requirements, and may be used as a powerful analytical alternative for detection. In this manuscript, we present a practical route to fabricate these detection substrates for detection of ultra-low concentrations of aqueous acrylamide solutions. The facile method is based on deposition of graphene oxide on Si wafers by ultrasonication, followed by surface reduction. These substrates require no adhesion layer or pretreatment with O 2 plasma or aminopropyl triethoxysilane for the coating process. Sonochemical deposition of silver nanoparticles on the substrates is also carried out and the product compared with the proposed Si-reduced graphene oxide wafers.

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Dramatic increase in the Raman signal of functional groups on carbon nanotube surfaces

Cited by 10 publications

References 46 publications

Fabrication and Characterization of Inorganic Silver and Palladium Nanostructures within Hexagonal Cylindrical Channels of Mesoporous Carbon

Fabrication and Characterization of Inorganic Silver and Palladium Nanostructures within Hexagonal Cylindrical Channels of Mesoporous Carbon

Plasmon enhanced Raman scattering effect for an atom near a carbon nanotube

Can r-graphene oxide replace the noble metals in SERS studies: the detection of acrylamide

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