Efficient Direct Water‐Solubilisation of Single‐Walled Carbon Nanotube Derivatives

Arrais, Aldo; Boccaleri, Enrico; Diana, Eliano

doi:10.1081/fst-200032896

Cited by 15 publications

(6 citation statements)

References 45 publications

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“…36 Typically, the peak at 1630 cm −1 is detected as a very weak signal in perfect SWCNTs because of the symmetry of the dipole moment. [37][38][39] Furthermore, this peak corresponded to the CvC stretching mode of SWCNT graphitic layers near the modified sites, which is IR-activated by extensive sidewall functionalization. 38,40,41 From these facts, it is evident that the peak at 1630 cm −1 existed by the functionalization of SWCNTs.…”

Section: Resultsmentioning

confidence: 97%

“…3c and d, respectively. 2,39,[50][51][52][53][54] Generally, the UV-VIS-NIR absorption spectrum of the arcdischarge SWCNTs consists of four bands. These four absorption bands are divided into a -plasmon ͑200-300 nm͒, the first metallic interband transition ͑M 11 Ϸ 590-765 nm͒, and the first ͑S 11 Ϸ 1240-2100 nm͒ and the second ͑S 22 Ϸ 760-1250 nm͒ semiconducting interband transitions.…”

Section: K132mentioning

confidence: 99%

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Interaction Between Carbonaceous Structure and Functionalized Single-Walled Carbon Nanotubes

Lee

et al. 2010

J. Electrochem. Soc.

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The properties of functionalized single-walled carbon nanotube (f-SWCNT) supernatant samples obtained through steps of acid oxidation–centrifugation–decantation were characterized by spectroscopic tools. Fourier transform IR spectroscopy provided evidence for the chemical and structural variations generated on the f-SWCNTs within each supernatant sample. The results from UV-visible near-IR spectroscopy revealed that the density difference of the carbonaceous impurity with functional groups on the f-SWCNTs contributed to the attenuation of electrical conductivity. In the Raman results, the shift of frequency in the radial breathing mode (RBM) was associated with an increase in diameter of the f-SWCNTs and a decrease in RBM intensity was attributed to the depletion of valence band electrons. The redshift of the tangential mode indicates the reduction in the bandgaps of the f-SWCNTs by the decrease in carbonaceous impurity.

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Section: Resultsmentioning

confidence: 97%

Section: K132mentioning

confidence: 99%

Interaction Between Carbonaceous Structure and Functionalized Single-Walled Carbon Nanotubes

Lee

et al. 2010

J. Electrochem. Soc.

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“…Furthermore, in FT-IR spectrum of Sample No. 2, two other peaks are observed at 1250 cm −1 and 1160 cm −1 , which are assigned to stretching vibration of epoxy C-O-C [52,54] and different alcoholic C-OH [50], respectively. As for Sample No.…”

Section: Resultsmentioning

confidence: 97%

“…1 and 2 presents multiple absorption peaks of various chemical bonds. The strongest peak in both spectra, set at approximately 3445 cm −1 , is indicative of ubiquitous O-H stretches [50][51][52]. Besides, both spectra present several peculiar absorption peaks at 2875-2957 cm −1 (symmetric and anti-symmetric stretching vibrations of CH 2 ) [51,52], at approximately 1629 and 1440 cm −1 (C=C, skeletal vibrations of unoxidized graphitic domains) [51,53], at approximately 1387 cm −1 (the stretching vibration of C-O of carboxylic acid) [52] and at 1053 cm −1 (alkoxy C-O stretching vibration) [52][53][54].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Few-Layer Graphene by Pulsed Discharge in Graphite Micro-Flake Suspension

et al. 2019

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Few-layer graphene nanosheets were produced by pulsed discharge in graphite micro-flake suspension at room temperature. In this study, the discharging current and voltage data were recorded for the analysis of the pulsed discharge processes. The as-prepared samples were recovered and characterized by various techniques, such as TEM, SEM, Raman, XRD, XPS, FT-IR, etc. The presence of few-layer graphene (3–9 L) in micrometer scale was confirmed. In addition, it is investigated that the size of recovered graphene nanosheets are influenced by the initial size of utilized graphite micro-flake powder. Based on the process of pulsed discharge and our experimental results, the formation mechanism of few-layer graphene was discussed. The influence of charging voltage on as-prepared samples is also investigated.

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“…In order to deal with these problems, various physical and chemical modifications [ 13 ] on CNTs have been carried out for the purpose of improving their solubility in water, which will in turn partially resolve toxicity issue. For example, hydroxyl group [ 14 ], carboxyl group [ 15 ], polyethylene glycol [ 16 – 22 ], amino group [ 23 ], poly(allylamine) [ 24 ], DNA or RNA [ 25 , 26 ], and many others [ 13 , 27 ] have been used to functionalize CNTs. Meanwhile, the studies on the toxicities, bioeffects, and environment health risks about CNTs have also made great progresses in the past few years; the studies themselves have moved from in vitro model and statistical assay to in vivo animal studies and mechanisms investigations [ 11 , 28 – 31 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Cytotoxicity of Phosphoryl Choline Modified Single-Walled Carbon Nanotubes under a Live Cell Station

Zhao

Mao

Liu

et al. 2014

BioMed Research International

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Single-walled carbon nanotubes (SWCNTs) and various modified SWCNTs have drawn a lot of attention due to their potential applications in biomedical field. Before further moving on to real clinical applications, hydrophobicity and toxicity of SWCNTs should be investigated thoroughly. In this paper, 2-methacryloyloxy ethyl phosphorylcholine (MPC) was adopted to modify SWCNTs and phosphoryl choline was grafted onto SWCNTs as small molecule moieties and polymeric chains, which made SWCNTs dispersed stably both in water and in cell culture medium for a long time. Cytotoxicity of pristine and modified SWCNTs were assayed upon successful preparation of the designed modified SWCNT. Furthermore, the internalization of SWCNTs by three cells was investigated using a live cell station under normal culture temperature (37°C) and low temperature (4°C). The results showed that the internalization of modified SWCNTs was related to both the active transport and the passive transport. Although the modification with phosphoryl choline remarkably reduced the cytotoxicity of SWCNTs, the results were probably due to other reasons such as the decrease in the ratio of cells which internalized modified SWCNTs since the cells without SWCNTs occupation still exhibited normal states.

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Efficient Direct Water‐Solubilisation of Single‐Walled Carbon Nanotube Derivatives

Cited by 15 publications

References 45 publications

Interaction Between Carbonaceous Structure and Functionalized Single-Walled Carbon Nanotubes

Interaction Between Carbonaceous Structure and Functionalized Single-Walled Carbon Nanotubes

Preparation of Few-Layer Graphene by Pulsed Discharge in Graphite Micro-Flake Suspension

Investigation of Cytotoxicity of Phosphoryl Choline Modified Single-Walled Carbon Nanotubes under a Live Cell Station

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