The Experts below are selected from a list of 195 Experts worldwide ranked by ideXlab platform
Flavio Deflorian - One of the best experts on this subject based on the ideXlab platform.
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Behaviour of different removers on permanent anti-graffiti organic coatings
Journal of Building Engineering, 2016Co-Authors: Stefano Rossi, S. Petrolli, Michele Fedel, Flavio DeflorianAbstract:Graffiti removal presents high costs in street furniture, transport and architectural facades. Considering painted metallic surfaces, the removal has to be easy and not modify the protective and the aesthetic properties. The study of the interaction between paint and remover and the effects on the anti-graffiti properties is the aim of this paper. Two kinds of polyurethane organic coatings, indicated for metallic substrates, and two different surface finishing were considered. This kind of organic coatings shows a very good corrosion properties connected with the low water uptake together a very interesting aesthetical aspect. The behaviour of methylethylketone, xylene and an aliphatic and Aromatic Solvent mixture, before and after accelerated weathering, was evaluated. MEK was proven to be particularly aggressive. The wrinkled finishing shows strong criticality.
Stefano Rossi - One of the best experts on this subject based on the ideXlab platform.
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Behaviour of different removers on permanent anti-graffiti organic coatings
Journal of Building Engineering, 2016Co-Authors: Stefano Rossi, S. Petrolli, Michele Fedel, Flavio DeflorianAbstract:Graffiti removal presents high costs in street furniture, transport and architectural facades. Considering painted metallic surfaces, the removal has to be easy and not modify the protective and the aesthetic properties. The study of the interaction between paint and remover and the effects on the anti-graffiti properties is the aim of this paper. Two kinds of polyurethane organic coatings, indicated for metallic substrates, and two different surface finishing were considered. This kind of organic coatings shows a very good corrosion properties connected with the low water uptake together a very interesting aesthetical aspect. The behaviour of methylethylketone, xylene and an aliphatic and Aromatic Solvent mixture, before and after accelerated weathering, was evaluated. MEK was proven to be particularly aggressive. The wrinkled finishing shows strong criticality.
Michael J Zaworotko - One of the best experts on this subject based on the ideXlab platform.
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exciplex fluorescence as a diagnostic probe of structure in coordination polymers of zn2 and 4 4 bipyridine containing intercalated pyrene and enclathrated Aromatic Solvent guests
Journal of the American Chemical Society, 2007Co-Authors: Gregory J Mcmanus, John J Perry, Mark Perry, Brian D Wagner, Michael J ZaworotkoAbstract:Coordination polymers based on Zn(II)-4,4‘-bipyridine (Zn-bipy) frameworks containing pyrene intercalated between adjacent layers and Aromatic Solvent molecules enclathrated within the framework cavities have been prepared and characterized for the first time. These compounds are highly fluorescent, and show broad, featureless emission spectra significantly red-shifted relative to pyrene monomer fluorescence; this has been assigned to pyrene-bipy exciplex emission. Single-crystal X-ray structural analysis shows that the presence of the Aromatic Solvent molecule within the cavities has a profound effect on the architecture of these frameworks: in the case of benzene, toluene, p-xylene, and chlorobenzene, the Zn-bipy framework consists of 1-D ladders, whereas in the case of o-dichlorobenzene (the largest Solvent guest), the framework was based on a 2-D square grid. This difference in stoichiometry and architecture was also reflected in significant differences in the fluorescence of these coordination polym...
Lok Kumar Shrestha - One of the best experts on this subject based on the ideXlab platform.
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hierarchically structured fullerene c70 cube for sensing volatile Aromatic Solvent vapors
ACS Nano, 2016Co-Authors: Partha Bairi, Kosuke Minami, Waka Nakanishi, Jonathan P Hill, Katsuhiko Ariga, Lok Kumar ShresthaAbstract:We report the preparation of hierarchically structured fullerene C70 cubes (HFC) composed of mesoporous C70 nanorods with crystalline pore walls. Highly crystalline cubic shape C70 crystals (FC) were grown at a liquid–liquid interface formed between tert-butyl alcohol and C70 solution in mesitylene. HFCs were then prepared by washing with isopropanol of the FC at 25 °C. The growth directions and diameters of C70 nanorods could be controlled by varying washing conditions. HFCs perform as an excellent sensing system for vapor-phase Aromatic Solvents due to their easy diffusion through the mesoporous architecture and strong π–π interactions with the sp2 carbon-rich pore walls. Moreover, HFCs offer an enhanced electrochemically active surface area resulting in an energy storage capacity 1 order of magnitude greater than pristine C70 and fullerene C70 cubes not containing mesoporous nanorods.
Ramón Tena-zaera - One of the best experts on this subject based on the ideXlab platform.
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Co-Solvent Effect in the Processing of the Perovskite:Fullerene Blend Films for Electron Transport Layer-Free Solar Cells
The Journal of Physical Chemistry C, 2018Co-Authors: Jorge Pascual, Ivet Kosta, Elisa Palacios-lidon, Hans-juergen Grande, Mohammad Khaja Nazeeruddin, Andrey Chuvilin, Juan Luis Delgado, Giulia Grancini, Ramón Tena-zaeraAbstract:An understanding of the improvements achieved for the use of co-Solvents for methylammonium lead triiodide (MAPbI3):[70]fullerene blend films (MAPbI3:C70) processing is presented. A comparative study by using Aromatic (i.e., o-xylene and o-dichlorobenzene) and aliphatic (i.e., methylcyclohexane and chlorocyclohexane) co-Solvents proves the nature of the co-Solvent interacting with fullerene to be determining for achieving enhanced devices. UV-Vis spectra of the different [70]fullerene solutions suggest major impact of the solute-Aromatic Solvent interactions on the optoelectronic properties. The effect of Aromatic and aliphatic Solvents in the electronic structure of [70]fullerene crystals, obtained from the different solutions, is indeed demonstrated by Electron Energy Loss Spectroscopy. Morphological studies show elimination of pinholes (Field Emission Scanning Electron Microscopy) and different nanometric features related to fullerene (Atomic Force Microscopy) in MAPbI3:C70 blend films processed by usi...