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.

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.

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.

Nanoscientists develop new material with controllable pores

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

What do your skin, the clothes you wear, and the soil you stand on have in common? They are all porous substances. Like a sponge, their surfaces are covered with tiny holes that allow liquids and gasses to pass through. Porous materials are widespread throughout our world, and those with nanoscale pores—called mesoporous materials—make up everything from chemical catalyst supports to gas storage chambers and separation membranes.

Graphene at the forefront of a sports footwear revolution

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

A University of Manchester partnership is launching a revolutionary world-first in the sports footwear market following a unique collaboration with graphene experts.

Subnanometer-scale channels in 2-D materials could point toward future electronics, solar cells

04.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

"Two-dimensional materials"—materials deposited in layers that are only a few atoms thick—are promising for both high-performance electronics and flexible, transparent electronics that could be layered onto physical surfaces to make computing ubiquitous.

Clear leads to fully transparent devices

04.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Large-area, two-dimensional semiconductors wired through transparent oxide conductors produce high-performance see-through electronics.

QU research team innovates ways to synthesize new nanocatalysts

01.12. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

A research team from the Gas Processing Center (GPC) at Qatar University College of Engineering (QU-CENG) synthesized new nanocatalysts and improved existing ones via modern preparation techniques.

Based on the nanostructure of the sea urchin spines, team develops cement that is significantly more fracture-resistant

30.11. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Sea urchin spines are made mostly of calcite, but the spines are much more durable than this raw material alone. The reason for their strength is the way that nature optimises materials using a brick wall-style architecture. A research team headed by Professor Helmut Cölfen successfully synthesised cement at the nano-level according to this "brick and mortar" principle. During this process, macro-molecules were identified that take on the function of mortar, affixing the crystalline blocks to each other on the nano-scale, with the blocks assembling themselves in an ordered manner. The aim is to make cement more durable. The study's results are published in the 1 December 2017 issue of Science Advances.

Fast flowing heat in graphene heterostructures

30.11. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Nanoscale heat flow plays a crucial role in many modern electronic and optoelectronic applications, such as thermal management, photodetection, thermoelectrics and data communication. Two-dimensional layered materials could play a role in many of these applications. Perhaps even more promising are so-called van der Waals heterostructures, which consist of different layered two-dimensional materials stacked one on top of the other. These stacks can consist of materials with dramatically different physical properties, while the interfaces between them are ultra-clean and atomically sharp.

A nanotransistor made of graphene nanoribbons

30.11. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Graphene ribbons that are only a few atoms wide, so-called graphene nanoribbons, have special electrical properties that make them promising candidates for the nanoelectronics of the future. While graphene, a one-dimensional carbon layer, is a conductive material, it can become a semiconductor in the form of nanoribbons. This means that it has a sufficiently large energy or band gap in which no electron states can exist—it can be turned on and off, and thus may become a key component of nanotransistors.

Addition of tin boosts nanoparticle’s photoluminescence

29.11. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Researchers at the U.S. Department of Energy's Ames Laboratory have developed germanium nanoparticles with improved photoluminescence, making them potentially better materials for solar cells and imaging probes. The research team found that by adding tin to the nanoparticle's germanium core, its lattice structure better matched the lattice structure of the cadmium-sulfide coating which allows the particles to absorb more light.

Researchers discover big cryptographic potential in nanomaterial

29.11. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

The next generation of electronic hardware security may be at hand as researchers at New York University Tandon School of Engineering introduce a new class of unclonable cybersecurity security primitives made of a low-cost nanomaterial with the highest possible level of structural randomness. Randomness is highly desirable for constructing the security primitives that encrypt and thereby secure computer hardware and data physically, rather than by programming.

Researchers inadvertently boost surface area of nickel nanoparticles for catalysis

28.11. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Researchers from North Carolina State University and the Air Force Research Laboratory have discovered that a technique designed to coat nickel nanoparticles with silica shells actually fragments the material – creating a small core of oxidized nickel surrounded by smaller satellites embedded in a silica shell. The surprising result may prove useful by increasing the surface area of nickel available for catalyzing chemical reactions.

Tuning the wavelength of fluorescent carbon tubes

28.11. 2017 Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News

Carbon is not just the most important element for life, it also has fascinating properties of its own. Graphene—a pure carbon sheet just one atom thick—is one of the strongest materials. Roll graphene into a cylinder and you get carbon nanotubes (CNTs), the key to many emerging technologies.