News tagged with dyes
Purple Pokeberries hold secret to affordable solar power worldwide
the weeds that children smash to stain their cheeks purple-red and that Civil War soldiers used to write letters home - could be the key to spreading solar power across the globe, according to researchers at Wake Forest University's ...
Nanotechnology / Nanomaterials
Apr 29, 2010 |
4.5 / 5 (30) |
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Innovation puts next-generation solar cells on the horizon
In a world first, a Monash University-led international research team has developed an innovative way to boost the output of the next generation of solar cells.
Dec 01, 2009 |
4.3 / 5 (30) |
12
Porphyrin Dimers Increase Efficiency of Dye-Sensitized Solar Cells
(PhysOrg.com) -- Porphyrins are most commonly thought of as the pigment in red blood cells, but now scientists have found that porphyrins can also be used to increase the efficiency of an inexpensive type ...
Oct 30, 2009 |
4.4 / 5 (14) |
1
Bio meets nano: Quantum dots as light antennas for artificial photosynthetic systems
(PhysOrg.com) -- Our attempts to use solar energy continue to be very ineffective; the true masters of this craft are photosynthetic plants, algae, and bacteria. Science is trying to emulate these organisms.
Oct 01, 2010 |
4.8 / 5 (12) |
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An easy way to see the world's thinnest material
It's been used to dye the Chicago River green on St. Patrick's Day. It's been used to find latent blood stains at crime scenes. And now researchers at Northwestern University have used it to examine the thinnest material ...
Nanotechnology / Nanomaterials
Dec 23, 2009 |
4.8 / 5 (12) |
1
Off-the-shelf cancer detection: Consumer-grade camera detects cancer cells in real time
Using an off-the-shelf digital camera, Rice University biomedical engineers and researchers from the University of Texas M.D. Anderson Cancer Center have created an inexpensive device that is powerful enough ...
Chemistry / Analytical Chemistry
Jun 24, 2010 |
5 / 5 (10) |
0
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New dyes improve solar technologies for generating clean electricity and hydrogen fuel
(PhysOrg.com) -- Chemists at the University at Buffalo have synthesized a new class of photosensitizing dyes that greatly increase the efficiency of light-driven systems that produce two kinds of green energy: Solar electricity ...
Dec 29, 2010 |
4.6 / 5 (9) |
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Multi-component nano-structures with tunable optical properties
(PhysOrg.com) -- Scientists at the U.S. Department of Energy's Brookhaven National Laboratory report the first successful assembly of 3-D multi-component nanoscale structures with tunable optical properties ...
Nanotechnology / Nanomaterials
Sep 30, 2010 |
5 / 5 (8) |
1
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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) |
1
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Glowing 'Cornell dots' can show surgeons where tumors are
(PhysOrg.com) -- Brightly glowing nanoparticles known as "Cornell dots" are a safe, effective way to "light up" cancerous tumors so surgeons can find and remove them.
Nanotechnology / Bio & Medicine
Feb 19, 2009 |
5 / 5 (7) |
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Purple light means go, ultraviolet light means stop
A new membrane developed at the University of Rochester's Laboratory for Laser Energetics blocks gas from flowing through it when one color of light is shined on its surface, and permits gas to flow through when another color ...
Aug 01, 2010 |
5 / 5 (7) |
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Where no lab has gone before: Single-Molecule Electrokinetic Traps
(PhysOrg.com) -- To study the behavior of large protein complexes and long DNA chains in solution, researchers use so-called molecular traps. However, earlier traps have proven ineffective when working with s ...
May 25, 2011 |
5 / 5 (7) |
1
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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) |
10
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New molecular framework could lead to flexible solar cells
(PhysOrg.com) -- Making better solar cells: Cornell University researchers have discovered a simple process - employing molecules typically used in blue jean and ink dyes - for building an organic framework ...
Jun 29, 2010 |
4.3 / 5 (8) |
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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
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.
