News tagged with dyes
Electron transport in dye-based solar cells
European scientists studied electron flow in systems of organic photosensitive dyes and titanium-based materials. Results are particularly relevant to increasing the efficiency of a cost-effective class of ...
Nanotechnology / Nanomaterials
5 hours ago |
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Graetzel cells are implanted in an iPad keyboard
Dye-sensitized solar cells (DSSC) from EPFL enter the public market. Logitech chose this technology to power its new flagship product.
May 29, 2012 |
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New microscope uses rainbow of light to image the flow of individual blood cells
Blood tests convey vital medical information, but the sight of a needle often causes anxiety and results take time. A new device developed by a team of researchers in Israel, however, can reveal much the same ...
May 21, 2012 |
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Microscope looks into cells of living fish
Microscopes provide valuable insights in the structure and dynamics of cells, in particular when the latter remain in their natural environment. However, this is very difficult especially for higher organisms. ...
May 16, 2012 |
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Shining light on cells' inner workings
(Phys.org) -- Lanrong Bi and Nazmiye Yapici are shining new light on the hidden processes within cells. For their groundbreaking research, Bi, an assistant professor of chemistry at Michigan Technological ...
May 16, 2012 |
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Nanotube electrodes improve solar cells, could yield low-cost, efficient alternative
Forests of carbon nanotubes are an efficient alternative for platinum electrodes in dye-sensitized solar cells (DSC), according to new research by collaborators at Rice University and Tsinghua University.
Nanotechnology / Nanomaterials
Apr 17, 2012 |
4.3 / 5 (6) |
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Greening up the blue dye in jeans, police uniforms and the red, white and blue
Efforts are underway to develop a more environmentally friendly process for dyeing denim with indigo, the storied "king of dyes," used to the tune of 50,000 tons annually to color cotton blue jeans and hundreds of other products. ...
Apr 04, 2012 |
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Single molecules in a quantum movie
The quantum physics of massive particles has intrigued physicists for more than 80 years, since it predicts that even complex particles can exhibit wave-like behaviour – in conflict with our everyday ...
Mar 25, 2012 |
4.4 / 5 (9) |
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Glowing White: Solvent-free luminescent organic liquids for organic electronics
(PhysOrg.com) -- The future will be dominated by organic electronics, as opposed to current silicon-based technology. In the journal Angewandte Chemie, an international team of researchers has now introduced a new ...
Mar 16, 2012 |
5 / 5 (6) |
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Dye-sensitized solar cells with carbon nanotube transparent electrodes offer significant cost savings
Solar energy is one of the most promising forms of renewable energy, but the high cost of conventional solar cells has so far limited its popularity. To increase the competitiveness of solar energy, scientists ...
Nanotechnology / Nanomaterials
Mar 15, 2012 |
3.3 / 5 (4) |
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New dye will lead to more efficient solar energy technology
(PhysOrg.com) -- A North Carolina State University invention has significant potential to improve the efficiency of solar cells and other technologies that derive energy from light.
Nanotechnology / Nanomaterials
Dec 13, 2011 |
5 / 5 (7) |
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Medical dye is good news for frogs
A readily available medical dye could become an key tool in amphibian conservation and management and the research is soon to be published in the Herpetological Journal.
Dec 08, 2011 |
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Researchers' new recipe cooks up better tissue 'phantoms'
The precise blending of tiny particles and multicolor dyes transforms gelatin into a realistic surrogate for human tissue. These tissue mimics, known as "phantoms," provide an accurate proving ground for new photoacoustic ...
Nov 30, 2011 |
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Light vortex: Circularly polarized luminescence from a stirred and gelled solution of dye
(PhysOrg.com) -- Simple stirring can influence light, according to a report presented in the journal Angewandte Chemie by Kunihiko Okano and co-workers. Dye molecules locked in a gel send out “helical” ...
Oct 26, 2011 |
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New method cleans up textile industry's most dangerous chemicals
Textile dying is one of the most environmentally hazardous aspects of the textile industry. During dying, harmful chemicals that are difficult to break down are released, all too often into rivers and agricultural land. However, ...
Sep 26, 2011 |
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Dye
A dye is a colored substance that has an affinity to the substrate to which it is being applied. The dye is generally applied in an aqueous solution, and requires a mordant to improve the fastness of the dye on the fiber.
Both dyes and pigments appear to be colored because they absorb some wavelengths of light more than others. In contrast with a dye, a pigment generally is insoluble, and has no affinity for the substrate. Some dyes can be precipitated with an inert salt to produce a lake pigment, and based on the salt used they could be aluminum lake, calcium lake or barium lake pigments.
Dyed flax fibers have been found in the Republic of Georgia dated back in a prehistoric cave to 36,000 BP. Archaeological evidence shows that, particularly in India and Phoenicia, dyeing has been widely carried out for over 5000 years. The dyes were obtained from animal, vegetable or mineral origin, with no or very little processing. By far the greatest source of dyes has been from the plant kingdom, notably roots, berries, bark, leaves and wood, but only a few have ever been used on a commercial scale.
For more information about Dye, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
