In recent years chemists and materials scientists have enthusiastically searched for ways to make materials with nanoscale pores -- channels comparable in size to organic molecules -- that could be used, among other things, to separate proteins by size. Recently Cornell University researchers developed a method to "self-assemble" such structures by using organic polymers to guide the formation of ceramic structures.
Transmission electron micrographs show, at left, the regular pattern of hexagonal channels in the ceramic material, and at right, the smooth distribution of iron oxide particles (dark spots) within the ceramic matrix.
Now they have advanced another step by incorporating tiny magnetic particles of iron oxide into the walls of porous ceramic structures in a simple "one-pot" self-assembly. Such materials could be used to separate proteins tagged with magnetic materials, or in catalytic processes.
"This enables access, for the first time, to protein-separation technology based on a combination of size exclusion with magnetically assisted separation," explains Ulrich Wiesner, professor of materials science at Cornell, in Ithaca, N.Y., lead investigator for the research. One application could be the separation of a single protein out of the thousands found in blood serum.
Bill Steele | EurekAlert!
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Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
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Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
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In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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