UV–vis absorption spectroscopy of carbon nanotubes: Relationship between the π-electron plasmon and nanotube diameter

Rance, Graham A.; Marsh, Dan H.; Nicholas, R.J.; Khlobystov, Andrei N.

doi:10.1016/j.cplett.2010.05.012

Cited by 172 publications

(106 citation statements)

References 32 publications

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“…Considering that both DMF and H 2 O suspensions were prepared with the same initial concentration (0.25 mg/ml) and that they were analyzed immediately after sonication, the higher absorption band observed for the H 2 O sample indicates that in this case, a higher degree of dispersion of the SWCNT is obtained due to the presence of SDBS and PVP [31]. followed by the corresponding nanoparticle dispersion on a glass slide, followed by recovery of the sample in order to deposit it on a copper TEM grid.…”

Section: Swcnt Suspensions Characterizationmentioning

confidence: 99%

Single wall carbon nanotubes loaded with Pd and NiPd nanoparticles for H2 sensing at room temperature

García-Aguilar

Miguel-García

Berenguer-Murcia

et al. 2014

Carbon

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Pd and bimetallic Ni 50 Pd 50 nanoparticles protected by polyvinylpyrrolidone (PVP) have been synthesized by the reduction-by-solvent method and deposited on single wall carbon nanotubes (SWCNTs) to be tested as H 2 sensors. The SWCNTs were deposited by drop casting from different suspensions. The Pd nanoparticles-based sensors show a very reproducible performance with good sensitivity and very low response times (few seconds) for different H 2 concentrations, ranging from 0.2 to 5 % vol. H 2 in air at atmospheric pressure. The influence of the metal nanoparticle composition, the quality of SWCNTs suspension and the metal loading have been studied, observing that all these parameters play an important role in the H 2 sensor performance. Evidence for water formation during the H 2 detection on Pd nanoparticles has been found, and its repercussion on the behaviour of the assembled sensors is discussed.The sensor preparation procedure detailed in this work has proven to be simple and reproducible to prepare cost-effective and highly efficient H 2 sensors that perform very well under real application conditions. * Corresponding author. Fax: +34 965 903454 E-mail: a.berenguer@ua.es (Á. Berenguer-Murcia) 2 1. Introduction.

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Section: Swcnt Suspensions Characterizationmentioning

confidence: 99%

Single wall carbon nanotubes loaded with Pd and NiPd nanoparticles for H2 sensing at room temperature

García-Aguilar

Miguel-García

Berenguer-Murcia

et al. 2014

Carbon

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“…Both spectra show the characteristic π plasmon band of SWNTs at ~270 nm [43]. The SWCNT spectrum shows very weak bands at ~700 nm and 750 nm that correspond to the electronic transitions between the Van Hove singularities in the nanotube density of states, in these cases the E 11 transitions for metallic arc discharge nanotubes [44] (see inset)…”

Section: Materials Characterisationsmentioning

confidence: 99%

Preparation and characterization of a composite of gold nanoparticles and single-walled carbon nanotubes and its potential for heterogeneous catalysis

Shanahan¹,

Sullivan

McNamara³

et al. 2011

New Carbon Materials

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“…Biocompatibility, durability, wear resistance, and robustness make this carbon material attractive for bio-and medical applications [9]. However, the optical and electronic properties of these films may be influenced by the synthesis conditions [6][7][8][9][10][11][12][13]. That is why a comparative study of the graphene-based materials with short-range (e.g., PyC) and long-range (e.g., graphene) crystalline ordering may provide deeper insight on the synthesis and physical mechanisms responsible for the properties of carbon materials with dominating sp 2 hybridization of electron orbitals.…”

Section: Introductionmentioning

confidence: 99%

“…Such a study should include a detailed analysis of the strong absorption band near 240-300 nm ( Fig. 1), which originates from the π-π * electron transition and is observed in single-and multilayer graphene [5], carbon nanotubes [11], and HOPG [1,3]. This band is of special interest because of recent results on the application of carbon films for surface-enhanced Raman scattering (SERS), surface-enhanced infrared absorption (SEIRA) [12,13], and surface-enhanced coherent anti-stokes Raman spectroscopy (CARS) [14].…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of Pyrolytic Carbon Films Versus Graphite and Graphene

Довбешко¹,

Romanyuk²,

Pidgirnyi³

et al. 2016

Nano Online

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We report a comparative study of optical properties of 5-20 nm thick pyrolytic carbon (PyC) films, graphite, and graphene. The complex dielectric permittivity of PyC is obtained by measuring polarization-sensitive reflectance and transmittance spectra of the PyC films deposited on silica substrate. The Lorentz-Drude model describes well the general features of the optical properties of PyC from 360 to 1100 nm. By comparing the obtained results with literature data for graphene and highly ordered pyrolytic graphite, we found that in the visible spectral range, the effective dielectric permittivity of the ultrathin PyC films are comparable with those of graphite and graphene.

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UV–vis absorption spectroscopy of carbon nanotubes: Relationship between the π-electron plasmon and nanotube diameter

Cited by 172 publications

References 32 publications

Single wall carbon nanotubes loaded with Pd and NiPd nanoparticles for H2 sensing at room temperature

Single wall carbon nanotubes loaded with Pd and NiPd nanoparticles for H2 sensing at room temperature

Preparation and characterization of a composite of gold nanoparticles and single-walled carbon nanotubes and its potential for heterogeneous catalysis

Optical Properties of Pyrolytic Carbon Films Versus Graphite and Graphene

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