Posts Tagged ‘quantum dots’
Carbon fibers yield graphene quantum dots
RICE (US) — Scientists have developed a one-step chemical process to turn carbon fibers into graphene quantum dots. Continue…
Tuesday, January 17, 2012 12:54 - 0 Comments
Science & Technology - Dec 8, 2011 8:15 - 0 Comments
Bottle brush molecules filter impurities
U. BUFFALO (US) — Chemists have found a way to create tiny, tube-shaped molecular cages to capture and purify nanomaterials. (more…)
Science & Technology - Jul 20, 2011 10:55 - 0 Comments
Quantum dots leak toxic guts
U. BUFFALO (US) — In their afterlife, quantum dots made from cadmium and selenium release toxic ions into the earth within 15 days of entering the soil. (more…)
Science & Technology - Jul 5, 2011 9:55 - 2 Comments
Tug-of-war gives electrons new spin
U. BUFFALO (US) — At very small scales, it may be possible to create quantum dots that are magnetic, even if their electrons have opposing spins. (more…)
Science & Technology - May 17, 2011 12:29 - 0 Comments
Laser has more bang, less bulk
STANFORD (US) — In a push toward smaller, faster data transmission, researchers have produced a nanoscale laser that is much faster and vastly more energy efficient than anything available today. (more…)
Science & Technology - Mar 1, 2011 9:41 - 0 Comments
One layer triples solar cell prowess
STANFORD (US) — Adding a single layer of organic molecules less than a nanometer thick improves the efficiency of solar cells threefold and could possibly lead to less expensive, more efficient solar panels. (more…)
Science & Technology - Nov 2, 2010 13:17 - 2 Comments
Quantum dots carry drugs sans damage
U. BUFFALO (US) — A novel technology using quantum dots is expected to have major implications for research and treatment of tuberculosis, as well as other inflammatory lung diseases. (more…)
Science & Technology - Aug 25, 2010 14:48 - 1 Comment
Are atom-scale devices on the horizon?
MCGILL (CAN)—Researchers have discovered how to control the piezoelectric effect in nanoscale semiconductors called “quantum dots,” enabling the development of incredibly tiny new products. (more…)
Health & Medicine - Jul 8, 2010 12:01 - 1 Comment
Quantum dots detect rare cancer cells
EMORY/GEORGIA TECH (US)—Scientists have demonstrated that quantum dots—tunable fluorescent nanoparticles—make ideal tools for distinguishing and identifying rare cancer cells in tissue biopsies. (more…)
Science & Technology - Jun 21, 2010 15:21 - 2 Comments
Can quantum dots stop heat loss in solar cells?
U. MINNESOTA (US)—Researchers have cleared a major hurdle in the drive to build solar cells with potential efficiencies up to twice as high as current levels, which rarely exceed 30 percent. (more…)
Science & Technology - May 25, 2010 12:46 - 0 Comments
Digging theoretical wells to mine quantum dots
RICE (US)—Graphane, which is modified graphene, is the material of choice for physicists on the cutting edge of materials science. Now researchers have discovered the strategic extraction of hydrogen atoms from a two-dimensional sheet of graphane naturally opens up spaces of pure graphene that look—and act—like quantum dots. (more…)
Science & Technology - May 12, 2010 10:47 - 0 Comments
Another nail in the silicon chip coffin
MCGILL U. (CAN)—Physicists have developed a system for measuring the energy involved in adding electrons to semi-conductor nanocrystals, also known as quantum dots—a technology that may revolutionize computing and other areas of science. (more…)
Science & Technology - Mar 26, 2010 15:08 - 1 Comment
Quantum doughnuts freeze light
U. WARWICK (UK)—Researchers have found a way to use doughnut-shaped byproducts of quantum dots to slow and even freeze light, opening up a wide range of possibilities from reliable and effective light-based computing to the possibility of “slow glass.” (more…)
Science & Technology - Mar 12, 2010 12:32 - 2 Comments
Jumpy proteins repair DNA ‘potholes’
U. PITTSBURGH (US)—Repair proteins appear to efficiently scan the genome for errors by jumping like fleas between DNA molecules, sliding along the strands and perhaps pausing at suspicious spots. (more…)
Science & Technology - Oct 2, 2009 12:55 - 0 Comments
Map helps quantum dots go ‘designer’
U. MICHIGAN (US)—The creation of the first atomic-scale maps of quantum dots may speed progress toward the goal of producing “designer dots” that can be tailored for specific applications. (more…)
Science & Technology - Aug 20, 2009 4:00 - 0 Comments
Quantum dots catch cancer early
In this illustration, quantum dots are depicted as gold spheres that attract DNA strands linked to cancer risks. When the quantum dots are exposed to certain types of light, they transfer the energy to fluorescent molecules, shown as pink globes, that emit a glow. This enables researchers to detect and count the DNA strands linked to cancer. (Credit: Yi Zhang/ Johns Hopkins University)
Science & Technology - Jul 30, 2009 14:41 - 0 Comments
Golden combo yields do-it-all nanotool
A quantum dot (red) encapsulated in a gold shell, combining two useful nanoparticles in one package. The total structure measures less than 20 nanometers across.
