Science

Tags:

Science

Tiny tubes move into the fast lane

For the first time, Lawrence Livermore National Laboratory (LLNL) researchers have shown that carbon nanotubes as small as eight-tenths of a nanometer in diameter can transport protons faster than bulk water, by an order of magnitude.

A single chain of water molecules lines the cavity inside a carbon nanotube porin, which is embedded in a lipid bilayer.

Read more
376 reads

Tags:

Science

Researchers use single molecule of DNA to create world's smallest diode: Study advances search for silicon chip replacement

Researchers at the University of Georgia and at Ben-Gurion University in Israel have demonstrated for the first time that nanoscale electronic components can be made from single DNA molecules. Their study, published in the journal Nature Chemistry, represents a promising advance in the search for a replacement for the silicon chip.

The University of Georgia and Ben-Gurion University research team site-specifically inserted a small molecule named coralyne into the DNA and were able to create a single-molecule diode, which can be used as an active element in future nanoscale circuits.

Read more
349 reads

Tags:

Science

Opportunity's Devilish View from on High

From its perch high on a ridge, NASA's Mars Exploration Rover Opportunity recorded this image of a Martian dust devil twisting through the valley below.

Read more
316 reads

Tags:

Science

Scientists Push Valleytronics One Step Closer to Reality

Berkeley Lab and UC Berkeley researchers control a promising new way to encode electrons

This schematic shows a TMDC monolayer coupled with a host ferromagnetic semiconductor, which is an experimental approach developed by Berkeley Lab scientists that could lead to valleytronic devices. Valley polarization can be directly determined from the helicity of the emitted electroluminescence, shown by the orange arrow, as a result of electrically injected spin-polarized holes to the TMDC monolayer, shown by the blue arrow. The black arrow represents the direction of the applied magnetic field.

Read more
320 reads

Tags:

Science

Europe sending crude oil into space to study Earth’s depths

Jiuquan launch centre

Read more
406 reads

Tags:

Science

Ruthenium nanoframes open the doors to better catalysts

The world is run by catalysts. They clean up after cars, help make fertilizers, and could be the key to better hydrogen fuel. Now, a team of chemists, led by Xiaohu Xia from Michigan Technological University, has found a better way to make metal nanoframe catalysts.

Using a two-part process, chemist Xiaohu Xia and his team found a way to turn ruthenium into a nanoframe, a promising metal catalyst.

Read more
379 reads

Tags:

Science

Artificial molecules

Scientists at ETH Zurich and IBM Research Zurich have developed a new technique that enables for the first time the manufacture of complexly structured tiny objects joining together microspheres. The objects have a size of just a few micrometres and are produced in a modular fashion, making it possible to program their design in such a way that each component exhibits different physical properties. After fabrication, it is also very simple to bring the micro-objects into solution. This makes the new technique substantially different from micro 3D printing technology. With most of today's micro 3D printing technologies, objects can only be manufactured if they consist of a single material, have a uniform structure and are attached to a surface during production.

Artificial molecules are shown. The individual components are marked with different fluorescent dyes (molecule size: 2-7 micrometres; compilation of microscopic images).

Read more
361 reads

Tags:

Science

Heat and light get larger at the nanoscale: Columbia-led research team first to demonstrate a strong, non-contact heat transfer channel using light with performances that could lead to high efficiency electricity generation

In a new study recently published in Nature Nanotechnology, researchers from Columbia Engineering, Cornell, and Stanford have demonstrated heat transfer can be made 100 times stronger than has been predicted, simply by bringing two objects extremely close--at nanoscale distances--without touching. Led by Columbia Engineering's Michal Lipson and Stanford Engineering's Shanhui Fan, the team used custom-made ultra-high precision micro-mechanical displacement controllers to achieve heat transfer using light at the largest magnitude reported to date between two parallel objects.

This is a video of the high-precision micro-electromechanical system (MEMS) used to control the distance between two beams at different temperatures. The video is taken under a high magnification microscope. The whole video frame dimension is comparable to the diameter of a strand of human hair.