Mechanism and Kinetics of Spontaneous Nanotube Growth Driven by Screw Dislocations -- Morin et al. 328 (5977): 476 -- Science

Mechanism and Kinetics of Spontaneous Nanotube Growth Driven by Screw Dislocations -- Morin et al. 328 (5977): 476 -- Science: "We show that nanotube growth can be driven by axial screw dislocations: Self-perpetuating growth spirals enable anisotropic growth, and the dislocation strain energy overcomes the surface energy required for creating a new inner surface forming hollow tubes spontaneously."

Materials research advances reliability of faster 'smart sensors'

Materials research advances reliability of faster 'smart sensors' In military and security situations, a split second can make the difference between life and death, so North Carolina State University's development of new "smart sensors" that allow for faster response times from military applications is important. Equally important is new research from NC State that will help ensure those sensors will operate under extreme conditions – like those faced in Afghanistan or elsewhere.

Fractals

Fractals

Fractals

View more presentations from loly mier.

Wireless nano sensors could save bridges, buildings

Wireless nano sensors could save bridges, buildings ScienceDaily (Apr. 12, 2010) — Could inexpensive wireless sensors based on nanotechnology be used to alert engineers to problematic cracks and damage to buildings, bridges, and other structures before they become critical? A feasibility study published in the International Journal of Materials and Structural Integrity would suggest so.

Scientists create 'molecular paper' -- largest two-dimensional polymer crystal self-assembled in water

Scientists create 'molecular paper' -- largest two-dimensional polymer crystal self-assembled in water ScienceDaily (Apr. 15, 2010) — Two-dimensional, "sheet-like" nanostructures are commonly employed in biological systems such as cell membranes, and their unique properties have inspired interest in materials such as graphene.

PeerPower : Next big thing is really small

PeerPower : Next big thing is really small: "On November 9, 1989, a new era dawned. The event that ushered in this era had nothing to do with the historic collapse of the Berlin Wall.

Instead, the momentous event took place in the quiet confines of IBM’s Almaden Research Center in San Jose, California.

It was on that day that two IBM scientists, Don Eigler and Erhard Schweizer, purposely manipulated individual atoms to build a structure, a simple IBM logo. What made the logo so special was that it was created out of only 35 xenon atoms…"

Two-Dimensional Phonon Transport in Supported Graphene -- Seol et al. 328 (5975): 213 -- Science

Two-Dimensional Phonon Transport in Supported Graphene -- Seol et al. 328 (5975): 213 -- Science: "The reported thermal conductivity ({kappa}) of suspended graphene, 3000 to 5000 watts per meter per kelvin, exceeds that of diamond and graphite. Thus, graphene can be useful in solving heat dissipation problems such as those in nanoelectronics."

Discover Some Beauties From The Earth Bowels

Discover Some Beauties From The Earth Bowels

Discover Some Beauties From The Earth Bowels

View more presentations from Charlotte **.

Frictional Characteristics of Atomically Thin Sheets -- Lee et al. 328 (5974): 76 -- Science

Frictional Characteristics of Atomically Thin Sheets -- Lee et al. 328 (5974): 76 -- Science: "Using friction force microscopy, we compared the nanoscale frictional characteristics of atomically thin sheets of graphene, molybdenum disulfide (MoS2), niobium diselenide, and hexagonal boron nitride exfoliated onto a weakly adherent substrate (silicon oxide) to those of their bulk counterparts. Measurements down to single atomic sheets revealed that friction monotonically increased as the number of layers decreased for all four materials. Suspended graphene membranes showed the same trend, but binding the graphene strongly to a mica surface suppressed the trend"

Wakonda's Lost Wax Process for Solar : Greentech Media

Wakonda's Lost Wax Process for Solar : Greentech Media: "The key is the process. The company takes a sheet of copper and heats it to create a repeating grain pattern. The copper is then coated with another substance, which effectively becomes a mold of the pattern in the copper. The copper is then eliminated and active solar materials are added. Because of the shape of the second substrate, the solar materials take on the same pattern of the now-absent copper."

Stunning Research Shows High Potential for DNA Damage from Nanoparticles

Stunning Research Shows High Potential for DNA Damage from Nanoparticles: "(NaturalNews) Nanoparticles may be able to damage the DNA of cells without ever coming into contact with it, according to a study conducted by researchers from the Bristol Implant Research Center and published in the journal Nature Nanotechnology."

Safer nuclear reactors with self-healing nanocrystalline materials

Safer nuclear reactors with self-healing nanocrystalline materials: "Science Daily (Mar. 26, 2010) — Self-repairing materials within nuclear reactors may one day become a reality as a result of research by Los Alamos National Laboratory scientists."

Nanotechnology: exploiting the fourth independent degree of freedom - Small Times

Nanotechnology: exploiting the fourth independent degree of freedom - Small Times: "Executive overview
The many thoughtful definitions of nanotechnology offered in the media and literature in recent years do well in conveying a general idea. However, the most salient point, the essence of nanotechnology, is ignored or possibly unnoticed by most. At the heart of nanotechnology is the exploitation of size as an independent, fourth degree of freedom. This rarely acknowledged fact is discussed and examples presented."

New ceramic is not afraid of the cold - tech - 22 March 2010 - New Scientist

New ceramic is not afraid of the cold - tech - 22 March 2010 - New Scientist: "Dunk a hot ceramic into cold water and it will crack as the material contracts too rapidly to hold together – until now. New ceramics have been developed that wrap themselves in a blanket of insulating air to buffer the effects of sudden changes in the temperature of its environment."

Compliant systems: Flexible yet strong materials allow aircraft wings to flex with air flow

Compliant systems: Flexible yet strong materials allow aircraft wings to flex with air flow: "ScienceDaily (Mar. 14, 2010) — Those who witnessed the first takeoff of an Airbus A380 Superjumbo from Zurich airport at the end of January know that elegant is not the right word for the aircraft. On the other hand it is perfect to describe a crane as it leaves the ground, rising in a seemingly weightless fashion. This is not just because of the difference in size and weight -- the bird uses its flying surfaces in a completely different manner to the machine. It steers itself by continually varying the geometry of its wings."

NewsDaily: Experts design elastic iron for surgeries, buildings

NewsDaily: Experts design elastic iron for surgeries, buildings: "HONG KONG, Mar. 19, 2010 (Reuters) — Researchers in Japan have designed a super-elastic iron alloy which they hope can be used in sophisticated heart and brain surgeries and even buildings in earthquake zones."

Metallic glass yields secrets under pressure

Metallic glass yields secrets under pressure: "ScienceDaily (Mar. 17, 2010) — Metallic glasses are emerging as potentially useful materials at the frontier of materials science research. They combine the advantages and avoid many of the problems of normal metals and glasses, two classes of materials with a very wide range of applications. For example, metallic glasses are less brittle than ordinary glasses and more resilient than conventional metals."

Designer nanomaterials on demand: Scientists report universal method for creating nanoscale composites

Designer nanomaterials on demand: Scientists report universal method for creating nanoscale composites: "Now, researchers at Berkeley Lab's Molecular Foundry, in collaboration with researcher at the University of California, Berkeley, have shown how nanocomposites with desired properties can be designed and fabricated by first assembling nanocrystals and nanorods coated with short organic molecules, called ligands. These ligands are then replaced with clusters of metal chalcogenides, such as copper sulfide. As a result, the clusters link to the nanocrystal or nanorod building blocks and help create a stable nanocomposite. The team has applied this scheme to more than 20 different combinations of materials, including close-packed nanocrystal spheres for thermoelectric materials and vertically aligned nanorods for solar cells."

Silver proves its mettle for nanotech applications

Silver proves its mettle for nanotech applications

Ferrous Polycrystalline Shape-Memory Alloy Showing Huge Superelasticity -- Tanaka et al. 327 (5972): 1488 -- Science

Ferrous Polycrystalline Shape-Memory Alloy Showing Huge Superelasticity -- Tanaka et al. 327 (5972): 1488 -- Science: "Shape-memory alloys, such as Ni-Ti and Cu-Zn-Al, show a large reversible strain of more than several percent due to superelasticity. In particular, the Ni-Ti–based alloy, which exhibits some ductility and excellent superelastic strain, is the only superelastic material available for practical applications at present. We herein describe a ferrous polycrystalline, high-strength, shape-memory alloy exhibiting a superelastic strain of more than 13%, with a tensile strength above 1 gigapascal, which is almost twice the maximum superelastic strain obtained in the Ni-Ti alloys. Furthermore, this ferrous alloy has a very large damping capacity and exhibits a large reversible change in magnetization during loading and unloading. This ferrous shape-memory alloy has great potential as a high-damping and sensor material."