http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- Scientists in Switzerland are reporting an advance that could help tap the much-heralded potential of `quantum dots` - nanocrystals that glow when exposed to ultraviolet light - in the treatment of cancer and other diseases. They are publishing the first study showing that giving quantum dots an icing-like cap of certain sugars makes these nanoparticles accumulate in the liver but not other parts of the body. http://www.physorg.com/news155405702.html Nanotechnology Wed, 04 Mar 2009 16:22:18 EST news155405702 Scientists at Argonne National Laboratory's CNM Nanophotonics Group have measured how light emission from individual colloidal semiconductor nanocrystals, or quantum dots, is modified when in proximity to smooth metal films. http://www.physorg.com/news167323390.html Nanotechnology Mon, 20 Jul 2009 15:43:54 EST news167323390 (PhysOrg.com) -- Single atom quantum dots created by researchers at Canada`s National Institute for Nanotechnology and the University of Alberta make possible a new level of control over individual electrons, a development that suddenly brings quantum dot-based devices within reach. Composed of a single atom of silicon and measuring less than one nanometre in diameter, these are the smallest quantum dots ever created. http://www.physorg.com/news152271696.html Nanotechnology Tue, 27 Jan 2009 09:42:04 EST news152271696 (PhysOrg.com) -- While quantum dots have existed since the 1980s, only in the past decade have physicists successfully created lateral few-electron single quantum dots. These quantum dots enable physicists to manipulate quantum spins, which could be used as qubits for quantum information applications. Along these lines, a team of physicists from the National Research Council in Canada who were responsible for the original lateral few-electron single quantum dot have recently designed a new few-electron triple quantum dot circuit, and demonstrated that all three quantum dots can be tuned in resonance. http://www.physorg.com/news178789034.html Nanotechnology Mon, 30 Nov 2009 09:10:01 EST news178789034 Researchers from the Kavli Institute of NanoScience in Delft are the first to have successfully captured a single electron in a highly tunable carbon nanotube double quantum dot. This was made possible by a new approach for producing ultraclean nanotubes. Moreover, the team of researchers, under the leadership of Spinoza winner Leo Kouwenhoven, discovered a new sort of tunneling as a result of which electrons can fly straight through obstacles. The results of the research were published by Nature Nanotechnology on April 5, 2009. http://www.physorg.com/news161521344.html Nanotechnology Thu, 14 May 2009 12:03:58 EST news161521344 (PhysOrg.com) -- `People are interested in the mid-infrared,` Dan Wasserman tells PhysOrg.com. Infrared light has a wavelength longer than visible light, and many molecules have numerous very strong optical resonances in the midinfrared. `Because of this, the midinfrared is an important wavelength range for trace gas sensing applications.` In addition the midinfrared is also of interest for applications such as thermal imaging, countermeasures, and even free space communication. http://www.physorg.com/news154609081.html Physics Mon, 23 Feb 2009 10:59:14 EST news154609081 (PhysOrg.com) -- University of Michigan physicists have created the first atomic-scale maps of quantum dots, a major step toward the goal of producing "designer dots" that can be tailored for specific applications. http://www.physorg.com/news173444221.html Nanotechnology Tue, 29 Sep 2009 11:58:44 EST news173444221 By placing quantum dots on a specially designed photonic crystal, researchers at the University of Illinois have demonstrated enhanced fluorescence intensity by a factor of up to 108. Potential applications include high-brightness light-emitting diodes, optical switches and personalized, high-sensitivity biosensors. http://www.physorg.com/news109945334.html Nanotechnology Tue, 25 Sep 2007 13:22:14 EST news109945334 To exploit the quantum world to the fullest, a key commodity is entanglement -the spooky, distance-defying link that can form between objects such as atoms even when they are completely shielded from one another. Now, physicists at the Joint Quantum Institute (JQI), a collaborative organization of the National Institute of Standards and Technology and the University of Maryland, have developed a promising new source of entangled photons using quantum dots tweaked with a laser. The JQI technique may someday enable more compact and convenient sources of entangled photon pairs than presently available for quantum information applications such as the distribution of "quantum keys" for encrypting sensitive messages. http://www.physorg.com/news177763808.html Physics Wed, 18 Nov 2009 10:50:39 EST news177763808 (AP) -- Light-emitting diodes are prime candidates for replacing inefficient incandescent bulbs, but have a few things working against them. They can provide a pleasing warm light or they can be energy-efficient, but they haven't been able to be both at the same time. http://www.physorg.com/news160766041.html Nanotechnology Tue, 05 May 2009 18:14:31 EST news160766041 (PhysOrg.com) -- `Quantum wells have been instrumental in telecommunications, enabling light amplification,` Patanjali Kambhampati tells PhysOrg.com, `but theory has suggested that a very small - colloidal - quantum dot could amplify light even better than a quantum well. There have been problems, however, in getting lasers to work properly with colloidal quantum dots, so focus has shifted to other types of structures.` http://www.physorg.com/news157805833.html Physics Wed, 01 Apr 2009 11:57:37 EST news157805833 Quantum dots linked to biological molecules, such as antibodies, have shown promise as a new tool for detecting and quantifying a wide variety of cancer-associated molecules. Now, thanks to detailed studies of how to make these labeled quantum dots and use them to detect disease markers, so-called bioconjugated quantum dots may finally be ready for widespread use in the clinic. http://www.physorg.com/news99065913.html Nanotechnology Tue, 22 May 2007 15:18:33 EST news99065913 Quantum dots have the potential to bring many good things into the world: efficient solar power, targeted gene and drug delivery, solid-state lighting and advances in biomedical imaging among them. http://www.physorg.com/news152797334.html Nanotechnology Mon, 02 Feb 2009 11:42:35 EST news152797334 One of the more interesting concepts being looked at in terms of quantum chemistry is that of three-photon absorption (3PA). 3PA works when three photons are simultaneously absorbed in one event. Because three photon absorption most commonly occurs in longer wavelengths (near infrared), some scientists see hope for it in terms of biomedical and photonic applications. http://www.physorg.com/news127733113.html Physics Fri, 18 Apr 2008 10:25:13 EST news127733113 According to recent research, tiny clusters of atoms known as quantum dots may be excellent media for quantum teleportation, a physics phenomenon in which information - in the form of a quantum state, a very specific mathematical `signature` of an atom - can be transmitted almost instantaneously to a distant location without having to physically travel through space. Teleportation is one facet of quantum information science, a developing field that could have a major impact on computing and communications. http://www.physorg.com/news101640721.html Nanotechnology Thu, 21 Jun 2007 10:32:01 EST news101640721