The most important factors for computer storage are: read/write speeds, storage density, endurance, reliability, and cost. DRAMs are short-term memories with high speed but the data must be refreshed over 100 times per second to maintain its memory. Flash memory can store data for years without refreshing, but writes information about 1000 times slower than DRAM.</p> <p><!--break--></p> <p style="margin-bottom: 0.0001pt;" class="MsoNormal"><strong><br> Technology</strong><br> The invention is a semiconductor nanostructure based non-volatile memory cell that can provide the best of both DRAM and flash memory: long term storage with write speeds nearly as fast as DRAM. One difference from normal flash memory is varying the barrier height by changing the bias on the depletion region, enabling either retention or insertion of charge into the QD. A further difference is growing the QDs in the depletion region of a p-n junction, so that holes are stored in the QDs. Charge removal is achieved by using tunneling. The read mechanism is similar to that of flash memory.<br>
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New Lithium Salts of Pentafluorophenylamide Anions as Electrolytes in Lithium Ionic Batteries
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Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
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