Scientists channel graphene to understand filtration and ion transport into cells

08.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms—ions—but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells. To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules, particularly water, that have an affinity for the charged atoms. But these molecular processes have traditionally been difficult to model—and therefore to understand—using computers or artificial structures.

Scientists Develop Novel Lenses that Enable X-ray Microscopy with Record Nanometer Resolution

08.12. 2017 AZoNano.com - Nanotechnology News Feed

DESY researchers have designed innovative lenses with the potential to perform X-ray microscopy with nanometer-scale resolution. The team headed by Saša Bajt, DESY scientist from the Center for...

Strongly anisotropic spin relaxation observed in graphene

08.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Researchers of the ICN2 Physics and Engineering of Nanodevices Group, led by ICREA Prof. Sergio O. Valenzuela, have unambiguously demonstrated the anisotropic nature of spin relaxation in graphene when interfaced with transition metal dichalcogenides (TMDC). The paper, titled "Strongly anisotropic spin relaxation in graphene–transition metal dichalcogenide heterostructures at room temperature," was published this week in Nature Physics with lead author L. Antonio Benítez.

Chemists synthesize narrow ribbons of graphene using only light and heat

08.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Silicon—the shiny, brittle metal commonly used to make semiconductors—is an essential ingredient of modern-day electronics. But as electronic devices have become smaller and smaller, creating tiny silicon components that fit inside them has become more challenging and more expensive.

Nanometrics Announces Expansion of IMPULSE+ Integrated Metrology into 3D-NAND Interconnect Process Control

08.12. 2017 AZoNano.com - Nanotechnology News Feed

Nanometrics Incorporated (NASDAQ:NANO), a leading provider of advanced process control systems, today announced that its IMPULSE®+ integrated metrology platform has been adopted into key...

Scientist’s accidental exhale leads to improved DNA detector

07.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Greg Madejski held his breath as he looked into the microscope, trying to weld two fingernail-sized chips together: a tiny chip containing a nanofilter on top of another chip with a DNA sensor.

Caltech Team Manages to “Paint” Smallest Mona Lisa Using DNA

07.12. 2017 AZoNano.com - Nanotechnology News Feed

Caltech's Paul Rothemund (BS '94)—currently research professor of bioengineering, computing and mathematical sciences, and computation and neural systems—developed a technique to...

Innovative Strategy for Isolating Ring-Shaped Molecules from Linear Ones

07.12. 2017 AZoNano.com - Nanotechnology News Feed

The distinction between rings formed of the same material and linear chains is that although the molecular building blocks are the same, from a mathematical point of view, topologies of the two...

Study Finds Purified Carbon Nanotubes Dispersed in Water Promoted Plant Growth

07.12. 2017 AZoNano.com - Nanotechnology News Feed

Researchers from the Rice University have discovered that when purified carbon nanotubes were introduced to wheatgrass strains it had an advantageous impact on their early growth . However, the same...

Demonstrating high performance 2-D monolayer transistors on paper substrates

07.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

(Tech Xplore)—A pair of researchers, Saungeun Park and Deji Akinwande, with the University of Texas at Austin, recently demonstrated high-performance 2-D monolayer transistors on paper substrates at this year's International Electron Devices Meeting. At their presentation, they reported creating graphene and molybdenum disulfide transistors on a normal paper substrate and how well they worked—nearly as well as those based on plastic.

Mastering tailored design of aluminum nanomaterials

07.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Whether for energy applications or nuclear waste management, industrial processing of aluminum requires understanding its behavior in highly alkaline solutions. Processing slurries and precipitates (typically gibbsite, α-Al(OH)3) from these solutions is aided by controlling the shape of tiny particles that are produced. Researchers at the IDREAM Energy Frontier Research Center, funded by DOE's Office of Science, Basic Energy Sciences, developed a synthesis route. The scientists devised the route based on simple, rational design principles. With it, the team produced highly uniform gibbsite nanoplates with optimal yield.

Research team saves information on a single molecule

07.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Over the past few years, the building blocks of storage media have become ever smaller. But further miniaturization of the current technology is hindered by fundamental limits of quantum mechanics. A new approach consists of using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. To do so, they have to be placed on surfaces without damaging their ability to save the information.

Physicists stretch diamond using an electric field

07.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

A research team from the Faculty of Physics of Lomonosov Moscow State University stretched acicular diamond crystallites using an electric field. Deformation occurring during the stretching causes changes in the luminescence spectrum. This effect can be used to develop electric field detectors and other quantum optic devices. The work was published in Nano Letters.

A 100-fold leap to GigaDalton DNA nanotech

07.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

DNA, present in almost every cell, is increasingly being used as a building material to construct tiny, but sophisticated structures such as autonomous 'DNA walkers' that can move along a microparticle surface, fluorescent labels for diagnostic applications, 'DNA boxes' that serve as smart drug-delivery vehicles programmed to open up at disease sites to release their therapeutic content, or programmable factories for nanoparticles of defined sizes and shapes for new optical and electronic applications.

Wheat gets boost from purified nanotubes

06.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

The introduction of purified carbon nanotubes appears to have a beneficial effect on the early growth of wheatgrass, according to Rice University scientists. But in the presence of contaminants, those same nanotubes could do great harm.