Charge transfer effects in acid treated single-wall carbon nanotubes

Barros, Eduardo B.; Filho, A. G. Souza; Lemos, V.; Fílho, J. Mendes; Fagan, Solange B.; Herbst, Marcelo H.; Rosolen, José Maurício; Luengo, C.A.; Huber, J.G.

doi:10.1016/j.carbon.2005.04.032

Cited by 60 publications

(52 citation statements)

References 29 publications

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“…an increase of the tangential mode wavenumbers, are reported, e.g. for nitric acid treatments, 61,97,125,128,129,134,135 SOCl 2 treatment, 136,137 ozone oxidation, 60 oxidation by 130 upon solubilization of acidoxidized SWCNTs using SOCl 2 . Also, a downshift of the G-band was reported upon functionalization in ammonia plasma 103,138 and electrochemical nitration.…”

Section: Shift Of Raman Modesmentioning

confidence: 95%

Raman spectroscopy of covalently functionalized single‐wall carbon nanotubes

Graupner

2007

J Raman Spectroscopy

301

229

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Raman spectroscopy is one of the most extensively employed methods for the characterization of carbon nanotubes. In this review article, an overview about Raman spectroscopy as a tool for the characterization of functionalized single-walled carbon nanotubes (SWCNTs) is given. First, the relevant Raman modes in SWCNTs are introduced. Then, in a phenomenological approach, the effects that are observed for the individual modes in the Raman spectra are compiled and discussed. It is shown that special care has to be taken in order to separate the effects of functionalization, which are specific to a subset of the SWCNTs (metallic/semiconducting or diameter dependent), from changes in sample morphology or doping effects.

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Section: Shift Of Raman Modesmentioning

confidence: 95%

Raman spectroscopy of covalently functionalized single‐wall carbon nanotubes

Graupner

2007

J Raman Spectroscopy

301

229

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“…These results insinuate that disruption in electrostatics due to ENM-protein charge transfer leads to the breaking of peripheral H-bonds in the α-helices and permanent denaturation of BSA on SWNTs [50,51].…”

Section: Charge Transfer During Corona Formationmentioning

confidence: 88%

Spectroscopic Insights into the Nano-Bio Interface

Raghavendra¹,

Gregory²,

Persaud³

et al. 2018

Unraveling the Safety Profile of Nanoscale Particles and Materials - From Biomedical to Environmental Applications

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Engineered nanomaterials (ENMs) strongly interact with biomolecules due to their unique physicochemical properties. From the standpoint of nanotoxicity, it is imperative to achieve a comprehensive understanding of various nano-bio interactions to ultimately design benign ENMs that do not elicit adverse physiological responses. Spectroscopic tools are ideal for elucidating the underlying biophysical mechanisms of nano-bio interactions. In this chapter, we review spectroscopy techniques, such as Raman, infrared, circular dichroism (CD), and hyperspectral imaging, to illuminate the nano-bio interface. Particularly, we discuss the role of spectroscopic tools in gaining a fundamental understanding of the formation and inluence of protein corona on ENM physiological responses.

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“…Results show that the C=O band shifts to higher frequencies with increasing acid treatment time. In addition, acid treated SWNTs showed two peaks at 1200 and 1370 cm -1 due to C-O stretching [22,23]. ; the peak intensity of the acid treated SWNTs is greater than that of the raw SWNTs [24].…”

Section: Ftir Spectroscopy Analysis Of Acid Treated Swntsmentioning

confidence: 89%

Mechanical and thermal properties of PP/compatibilized PP/acid treated SWNTs nanocomposites: Effect of different acid treatment times

2008

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Abstract:In the present work, the effect of different acid treatment times of singlewalled carbon nanotubes (SWNTs) on the mechanical and thermal properties of polypropylene (PP)/maleated polypropylene (PP-g-MA) nanocomposites was investigated. The acid treatment process was based on a mixture of concentrated sulphuric and nitric acids. The SWNTs were treated with the acid mixture for 1, 3, and 6 h. FTIR, Raman spectroscopy and TEM revealed the values of carboxylic groups, graphitization and morphology of acid treated SWNTs, respectively. The thermal and mechanical properties and the morphology of nanocomposites were investigated by tensile tests, DMTA, DSC, and SEM.

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Charge transfer effects in acid treated single-wall carbon nanotubes

Cited by 60 publications

References 29 publications

Raman spectroscopy of covalently functionalized single‐wall carbon nanotubes

Raman spectroscopy of covalently functionalized single‐wall carbon nanotubes

Spectroscopic Insights into the Nano-Bio Interface

Mechanical and thermal properties of PP/compatibilized PP/acid treated SWNTs nanocomposites: Effect of different acid treatment times

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