Daily non-political popular news in brief.
Super-thin membrane, 50 atoms thick, sorts individual molecules
02-14-2007 · EurekAlert!A newly designed porous membrane, so thin it's invisible edge-on, may revolutionize the way doctors and scientists manipulate objects as small as a molecule. The 50-atom thick filter can withstand surprisingly high pressures and may be a key to better separation of blood proteins for dialysis patients, speeding ion exchange in fuel cells, creating a new environment for growing neurological stem cells, and purifying air and water in hospitals and clean-rooms at the nanoscopic level.
Read more »
Keywords: super-thin, membrane, atoms, thick, sorts, individual, molecules, super, thin, atom, sort, molecule
« Previous | Next »
Similar news on "Super-thin membrane, 50 atoms thick, sorts individual molecules":
- Invisible for electrons
03-06-2007 · EurekAlert!
As thin as it gets: the carbon membranes recently created by Max Planck scientists are only one atom thick. For electrons, such membranes are almost completely transparent -- using an electron microscope, scientists may thus be able to examine absorbed individual molecules on the membranes, and image the atomic structure of complex biological molecules. Such ultra-thin membranes may also be used to filter out gases (Nature, March 1, 2007).
Similar news · Read more »
- DNA sieve -- Nanoscale pores can be tiny analysis labs
05-11-2007 · EurekAlert!
A international team led by researchers at the National Institute of Standards and Technology has proven for the first time that a single nanometer-scale pore in a thin membrane -- resembling one found in a living cell -- can be used to accurately detect and sort different-sized polymer chains (a model for biological molecules) that pass through the channel.
Similar news · Read more »
- Physics graduate student creates graphene resonator
02-16-2007 · EurekAlert!
Scott Bunch found that a single sheet of graphene, a form of carbon that is just one atom thick, can be isolated and used as an electromechanical resonator. The material could be useful for weighing atoms and molecules.
Similar news · Read more »
- New method to directly probe the quantum collisions of individual atoms
04-18-2007 · EurekAlert!
A new method has been developed to directly and precisely measure a quantum property of individual atoms -- the phase shifts that result when they collide at ultracold temperatures -- in a way that is independent of the accuracy-limiting density of the atoms. These shifts, which had been impossible to measure with high precision, are important for atomic clocks and other areas of contemporary atomic physics, including research on super-sensitive atom lasers high-temperature superconductivity.
Similar news · Read more »
- Smart thin film membranes adopt properties of guest molecules
03-28-2007 · EurekAlert!
Virginia Tech researchers announced last year that they had created a nanostructured membrane that incorporates DNA base pairs in order to impart molecular recognition and binding ability to the synthetic material. This year they will show for the first time that these new films, membranes, and elastomers are compatible with diverse organic and inorganic molecules and will adopt properties of the guest molecules.
Similar news · Read more »
- Delft University of Technology shines light on atomic transistor
11-22-2006 · EurekAlert!
Researchers from TU Delft and FOM Foundation have successfully measured transport through a single atom in a transistor. This research offers new insights into the behaviour of so-called dopant atoms in silicon. The researchers are able to measure and manipulate a single dopant atom in a realistic semi-conducting environment. The individual behaviour of dopant atoms is a stumbling block to the further miniaturisation of electronics. The work is published in Physical Review Letters.
Similar news · Read more »
- IBM and Imago find a crucial difficulty in semiconductor device scaling
09-06-2007 · EurekAlert!
As reported in the Sept. 7, 2007 issue of Science, IBM and Imago used atom probe tomography to observe, for the first time, distributions of individual dopant atoms at defects in semiconductor devices. The researchers found that clusters of dopant atoms form around defects after ion implantation and annealing. These clusters persist even after considerable thermal treatment, creating dopant fluctuations that may ultimately limit the scalability of semiconductor devices.
Similar news · Read more »
- Sheet of carbon atoms acts like a billiard table, physicists find
09-14-2007 · EurekAlert!
Physicists at the University of California, Riverside have demonstrated that graphene -- a one-atom thick sheet of carbon atoms arranged in hexagonal rings -- can act as an atomic-scale billiard table, with electric charges acting as billiard balls. The finding underscores graphene's potential for serving as an excellent electronic material.
Similar news · Read more »
- With Record Resolution And Sensitivity, Tool Images How Life Organizes In A Cell Membrane
10-02-2006 · ScienceDaily
What's the difference between a lifeless sack of chemicals and a living cell? It's all in the way they're organized, according to Stanford biophysical chemist Steven Boxer. With colleagues at Stanford, the University of California-Davis and Lawrence Livermore National Laboratory, he has developed a way to image cell membranes with unprecedented resolution-on the order of 100 nanometers, a scale larger than individual molecules but much smaller than entire cells.
Similar news · Read more »
- Nanotube flickering reveals single-molecule rendezvous
06-07-2007 · EurekAlert!
In this week's issue of Science, French and US researchers describe a new technique that allowed them to zoom in and observe quantum quasiparticles called excitons on individual carbon nanotubes. The team, which was led by Rice University chemist Bruce Weisman and University of Bordeaux physicist Laurent Cognet, found that each exciton travels about 90 nanometers and visits around 10,000 carbon atoms during its 100-trillionth-of-a-second lifespan.
Similar news · Read more »
