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Image 1 - Giant Flakes Make Graphene Oxide Gel
2011-10-21 04:15:06

Rice, Colorado discovery could boost metamaterials, high-strength fibers Giant flakes of graphene oxide in water aggregate like a stack of pancakes, but infinitely thinner, and in the process gain characteristics that materials scientists may find delicious. A new paper by scientists at Rice University and the University of Colorado details how slices of graphene, the single-atom form of carbon, in a solution arrange themselves to form a nematic liquid crystal in which particles are...

2011-10-13 20:56:57

Design rules will enable scientists to use DNA to build nanomaterials with desired properties Nature is a master builder. Using a bottom-up approach, nature takes tiny atoms and, through chemical bonding, makes crystalline materials, like diamonds, silicon and even table salt. In all of them, the properties of the crystals depend upon the type and arrangement of atoms within the crystalline lattice. Now, a team of Northwestern University scientists has learned how to top nature by...

2011-10-11 13:49:34

Nanoparticles of a substance can be counted and the size distribution can be determined by dispersing the nanoparticles into a gas. But some nanoparticles tend to aggregate when the surrounding conditions change. Scientists at the University of Gothenburg, Sweden, have shown that it is possible to sort and count the particles, even when they have formed aggregates. "Nanoparticles are already used in many everyday products, such as sunscreen and cosmetics. It is important to be able to...

2011-10-05 17:52:53

Chemical engineer Ms Inês Mariz has presented guidelines for obtaining better quality and more efficient latex, in a PhD thesis defended at the University of the Basque Country (UPV/EHU). This involves a strategy which facilitates obtaining a more concentrated material without it losing its handling properties. In this way it is able to cover the substrate in question with fewer layers than is usual, it dries quicker, its formulation is more flexible and enables savings in...

2011-10-04 12:25:54

Researchers at Oregon State University have created a new, unifying method to describe a basic chemical concept called “electronegativity,” first described almost 80 years ago by OSU alumnus Linus Pauling and part of the work that led to his receiving the Nobel Prize. The new system offers simplicity of understanding that should rewrite high school and college chemistry textbooks around the world, even as it opens important new avenues in materials and chemical research, with...

2011-09-23 00:14:14

Light intensified by plasmonics yields a nanoscale nonlinear optical device that can be controlled electronically Not long after the development of the first laser in 1960 scientists discovered that shining a beam through certain crystals produced light of a different color; more specifically, it produced light of exactly twice the frequency of the original. The phenomenon was dubbed second harmonic generation. The green laser pointers in use today to illustrate presentations are based...

2011-09-19 07:58:38

Researchers from the University of Toronto (U of T), the King Abdullah University of Science & Technology (KAUST) and Pennsylvania State University (Penn State) have created the most efficient solar cell ever made based on collodial-quatum-dots (CQD). The discovery is reported in the latest issue of Nature Materials. Quantum dots are nanoscale semiconductors that capture light and convert it into an energy source. Because of their small scale, the dots can be sprayed on to flexible...


Word of the Day
omadhaun
  • A fool; a simpleton: a term of abuse common in Ireland and to a less extent in the Gaelic-speaking parts of Scotland.
This word is partly Irish in origin.