Creating and testing carbon interfaces – integrating oligomeric phthalocyanines onto single walled carbon nanotubes

Strauβ, Volker; Gallego, Almudena; Torre, Gema de la; Chamberlain, Thomas W.; Khlobystov, Andrei N.; Torres, Tomás; Guldi, Dirk M.

doi:10.1039/c4fd00063c

Cited by 7 publications

(10 citation statements)

References 25 publications

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“…Furthermore, the G + -Band is sensitive to charge transfer, as shown at Figure S2(B), the G-Band is up-shifted by 2 cm -1 in the V-Phe-SWCNT as compared to pristine-SWCNT due to the p-doping [Straub et al, 2014] [Voggu et al, 2008]. This result confirmed that the electron-acceptor viologen was attached on the skeleton of SWCNT.…”

Section: Resultssupporting

confidence: 56%

Viologen-functionalized single-walled carbon nanotubes as carrier nanotags for electrochemical immunosensing. Application to TGF-β1 cytokine

Sánchez‐Tirado

Arellano

González‐Cortés

et al. 2017

Biosensors and Bioelectronics

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Viologen-SWCNT hybrids are synthesized by aryl-diazonium chemistry in the presence of isoamyl nitrite followed by condensation reaction of the resulting HOOC-Phe-SWCNT with 1-(3-aminoethyl)-4,4'-bipyridinium bromine and N-alkylation with 2-bromoethylamine. The V-Phe-SWCNT hybrids were characterized by using different spectroscopic techniques (FT-IR, Raman, UV-vis), TGA and Kaiser test. Viologen-SWCNTs were used for the preparation of an electrochemical immunosensor for the determination of the transforming growth factor β1 (TGF-β1) cytokine considered as a reliable biomarker in several human diseases. The methodology involved preparation of V-Phe-SWCNT(-HRP)-anti-TGF conjugates by covalent linkage of HRP and anti-TGF onto V-Phe-SWCNT hybrids. Biotinylated anti-TGF antibodies were immobilized onto 4-carboxyphenyl-functionalized SPCEs modified with streptavidin and a sandwich type immunoassay was implemented for TGF-β1 with signal amplification using V-Phe-SWCNT(-HRP)-anti-TGF conjugates as carrier tags. The analytical characteristics exhibited by the as prepared immunosensor (range of linearity between 2.5 and 1000pgmL TGF-β1; detection limit of 0.95pgmL) improve notably those reported with other previous immunosensors or ELISA kits. A great selectivity against other proteins was also found. The prepared immunosensor was validated by determining TGF-β1 in real saliva samples. Minimal sample treatment was required and the obtained results were in excellent agreement with those obtained by using a commercial ELISA kit.

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Section: Resultssupporting

confidence: 56%

Viologen-functionalized single-walled carbon nanotubes as carrier nanotags for electrochemical immunosensing. Application to TGF-β1 cytokine

Sánchez‐Tirado

Arellano

González‐Cortés

et al. 2017

Biosensors and Bioelectronics

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“…These represent the excited-state features of CoMoCAT SWCNTs. 16 The bleaching features in the NIR are reflections of the ground state bands, seen in the absorption experiments. The ground state recovery of CoMoCAT SWCNT/PVBTA takes place within a few hundred picoseconds and is characterized by three different lifetimes: 2, 25, and 260 ps.…”

Section: Resultsmentioning

confidence: 95%

A carbon–carbon hybrid – immobilizing carbon nanodots onto carbon nanotubes

et al. 2015

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“…[73][74][75] However, it seems that in spite of the similar donor character of N,N-dimethylamino and thiophene, only the link between thiophene and pyrazoline is able to achieve an effective band gap opening. According to the Raman spectra, the G-band shift for the pyrrolidine derivative 4 is half that of pyrazoline derivatives (see Fig.…”

Section: Work Function Measurementsmentioning

confidence: 99%

“…In the case of the thiophene derivative 3b a peak at 1020 cm À1 corresponding to C-S aromatic vibration was also present. Finally, it should be noted that, for all pyrazoline-graphene derivatives 3a-d, the G band was shifted to lower frequencies (n = 10 cm À1 ) and this provides evidence of n-doping of the material [73][74][75] (Fig. 3 bottom).…”

Section: Experimental Demonstrationmentioning

confidence: 99%

Modulation of the exfoliated graphene work function through cycloaddition of nitrile imines

Barrejón

Gómez‐Escalonilla

Fierro

et al. 2016

Phys. Chem. Chem. Phys.

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After the feasibility of the 1,3-dipolar cycloaddition reaction between nitrile imines and exfoliated graphene by density functional theory calculations was proved, very few-layer graphene was effectively functionalized using this procedure. Hydrazones with different electronic properties were used as precursors for the 1,3-dipoles, and microwave irradiation as an energy source enabled the reaction to be performed in a few minutes. The anchoring of organic addends on the graphene surface was confirmed by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis.Ultraviolet photoelectron spectroscopy (UPS) was used to measure the work function and band gap of these new hybrids. Our results demonstrate that it is possible to modulate these important electronic valence band parameters by tailoring the electron richness of the organic addends and/or the degree of functionalization.

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Creating and testing carbon interfaces – integrating oligomeric phthalocyanines onto single walled carbon nanotubes

Cited by 7 publications

References 25 publications

Viologen-functionalized single-walled carbon nanotubes as carrier nanotags for electrochemical immunosensing. Application to TGF-β1 cytokine

Viologen-functionalized single-walled carbon nanotubes as carrier nanotags for electrochemical immunosensing. Application to TGF-β1 cytokine

A carbon–carbon hybrid – immobilizing carbon nanodots onto carbon nanotubes

Modulation of the exfoliated graphene work function through cycloaddition of nitrile imines

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