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21 results on '"Setaro, Antonio"'

2. Fluorescent Polymer-Single-Walled Carbon Nanotube Complexes with Charged and Noncharged Dendronized Perylene Bisimides for Bioimaging Studies

Author

Huth, Katharina, primary, Glaeske, Mareen, additional, Achazi, Katharina, additional, Gordeev, Georgy, additional, Kumar, Shiv, additional, Arenal, Raúl, additional, Sharma, Sunil K., additional, Adeli, Mohsen, additional, Setaro, Antonio, additional, Reich, Stephanie, additional, and Haag, Rainer, additional

Published
2018
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19. Polyglycerol-Derived Amphiphiles for the Solubilization of Single-Walled Carbon Nanotubes in Water: A Structure-Property Study

Author

Pascal Bluemmel, Chris S. Popeney, Britta Trappmann, Stephanie Reich, Radu-Cristian Mutihac, Rainer Haag, Antonio Setaro, Jonathan Vonneman, Chris S., Popeney, Setaro, Antonio, Radu Cristian, Mutihac, Pascal, Bluemmel, Britta, Trappmann, Jonathan, Vonneman, Stephanie, Reich, and Rainer, Haag

Subjects
Nanotube, Chemistry, 02 engineering and technology, Carbon nanotube, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Fluorescence, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, law.invention, Absorbance, Crystallography, chemistry.chemical_compound, law, Dendrimer, Amphiphile, Pyrene, Polar, Organic chemistry, Physical and Theoretical Chemistry, 0210 nano-technology
Abstract

A series of nonionic amphiphiles derived from polyglycerol dendrons were studied for their ability to solubilize and isolate single-walled carbon nanotubes. The amphiphiles possessed differently sized polar head groups, hydrophobic tail units, and various aromatic and non-aromatic groups between the head and tail groups. Absorbance analysis revealed that amphiphiles with anchor groups derived from pyrene were far inferior to those that possessed simple linear aliphatic tail groups. Absorbance and near-infrared fluorescence analyses revealed a weak dependence on the dendron size of the head group, but a strong positive trend in suspended nanotube density and fluorescence intensity for amphiphiles with longer tail units. Variations in the moieties linking the head and tail groups led to a range of effects on the suspensions, with linkers imparting flexibility and a bent shape that gave improved performance overall. This was illustrated most dramatically by a pair of benzamide-containing amphiphiles, the para isomer of which showed evidence in the fluorescence data of increased nanotube aggregate formation when compared with the meta isomer. In addition, statistical AFM was used to illustrate more directly the microscopic differences between amphiphiles that were effective at nanotube bundle disruption and those that were not.

Published
2011

20. Interaction between single-walled carbon nanotubes and alkyl-polyglycerol derivatives

Author

Chris S. Popeney, Stephanie Reich, Rainer Haag, Antonio Setaro, Britta Trappmann, Setaro, Antonio, Chris S., Popeney, Britta, Trappmann, Rainer, Haag, and Stephanie, Reich

Subjects
chemistry.chemical_classification, Nanotube, Photoluminescence, Selective chemistry of single-walled nanotubes, Carbon nanotube, Condensed Matter Physics, Photochemistry, Electronic, Optical and Magnetic Materials, law.invention, chemistry, law, Organic chemistry, Molecule, Spectroscopy, Luminescence, Alkyl
Abstract

We use three alkyl-polyglycerol derivatives to suspend singlewalled carbon nanotubes. The molecules differ by the aromatic moieties between the alkyl tail and the polyglycerol head. The suspended nanotubes are analysed by photoluminescence spectroscopy. We observe a dependence of the luminescence intensity and hence nanotube abundance on the aromatic moieties. Interestingly, the strength of interaction depends on the nanotube families.

Published
2010

21. Dispersion of carbon nanotubes using an azobenzene derivative

Author

Pascal Bluemmel, Antonio Setaro, Rainer Haag, Stephanie Reich, Chris S. Popeney, Pascal, Bluemmel, Setaro, Antonio, Chris S., Popeney, Rainer, Haag, and Stephanie, Reich

Subjects
Nanotube, Materials science, Photoluminescence, Absorption spectroscopy, Carbon nanotube, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Photochemistry, Electronic, Optical and Magnetic Materials, law.invention, Condensed Matter::Soft Condensed Matter, Condensed Matter::Materials Science, chemistry.chemical_compound, Adsorption, chemistry, Azobenzene, law, Organic chemistry, Sodium dodecyl sulfate, Dispersion (chemistry)
Abstract

Aqueous dispersions of carbon nanotubes (CNTs) were obtained by noncovalent adsorption of an azobenzene derivative carrying polyglycerol dendric structures. UV/Vis absorption spectra and photoluminescence maps were recorded to confirm successful nanotube debundling and suspension. Comparison to dispersion of nanotubes using sodium dodecyl sulfate (SDS) revealed shifts of the nanotube E22 excitation peaks from 28 to 67 meV as well as shifts from 21 to 37 meV of the E11 emission peaks.

Published
2010

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