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Latest Nanowire Stories

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2010-05-10 11:19:44

Rice researchers spin pure batches of nanotubes species In two new papers, Rice University researchers report using ultracentrifugation (UCF) to create highly purified samples of carbon nanotube species. One team, led by Rice Professor Junichiro Kono and graduate students Erik Haroz and William Rice, has made a small but significant step toward the dream of an efficient nationwide electrical grid that depends on highly conductive quantum nanowire. The other, led by Rice Professor Bruce...

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2010-04-23 12:40:00

Scientists take first step toward controlling the growth of nanomaterials without catalysts Researchers at the University of Wisconsin-Madison recently made a significant first step toward understanding how to control the growth of the nanotubes, nanowires and nanorods needed for renewable energy and other technology applications. These nanocrystalline materials, or nanomaterials, possess unique chemical and physical properties that can be used in solar energy panels, high energy density...

2010-04-21 13:55:56

Supercooling, a state where liquids do not solidify even below their normal freezing point, still puzzles scientists today. A good example of this phenomenon is found everyday in meteorology: clouds in high altitude are an accumulation of supercooled droplets of water below their freezing point. Scientists from the Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), the Centre National de Recherche Scientifique (CNRS) and the ESRF have found an...

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2010-04-21 08:35:06

Atomic force microscopy, a tactile-based probe technique, provides a three-dimensional nanoscale image of a material by gliding a needle-like arm across the material's surface. The core of AFM imaging workhorse is a cantilever with a sharp tip that deflects as it encounters undulations across a surface.  Due to a minimum force required for imaging, conventional AFM cantilevers can  deform or even tear apart living cells and other biological materials. While scientists have made...

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2010-04-06 13:44:46

Atoms spiral toward a charged carbon nanotube under dramatic acceleration before splitting apart Physicists at Harvard University have found that a high-voltage nanotube can cause cold atoms to spiral inward under dramatic acceleration before disintegrating violently. Their experiments, the first to demonstrate something akin to a black hole at atomic scale, are described in the current issue of the journal Physical Review Letters. "On a scale of nanometers, we create an inexorable and...

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2010-03-29 10:45:00

Study paves way for development of nanocircuits for energy, electronics applications Scientists have discovered the world's smallest superconductor, a sheet of four pairs of molecules less than one nanometer wide. The Ohio University-led study, published today as an advance online publication in the journal Nature Nanotechnology, provides the first evidence that nanoscale molecular superconducting wires can be fabricated, which could be used for nanoscale electronic devices and energy...

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2010-03-29 07:20:40

Self-powered nanosensors By combining a new generation of piezoelectric nanogenerators with two types of nanowire sensors, researchers have created what are believed to be the first self-powered nanometer-scale sensing devices that draw power from the conversion of mechanical energy. The new devices can measure the pH of liquids or detect the presence of ultraviolet light using electrical current produced from mechanical energy in the environment. Based on arrays containing as many as 20,000...

2010-03-22 11:28:24

Nanowire advances promise improved light-emitting diodes and solar-energy generation A recent advance by Arizona State University researchers in developing nanowires could lead to more efficient photovoltaic cells for generating energy from sunlight, and to better light-emitting diodes (LEDs) that could replace less energy-efficient incandescent light bulbs. Electrical engineers Cun-Zheng Ning and Alian Pan are working to improve quaternary alloy semiconductor nanowire materials. Nanowires...

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2010-03-04 14:04:23

Solar cells made from silicon are projected to be a prominent factor in future renewable green energy equations, but so far the promise has far exceeded the reality. While there are now silicon photovoltaics that can convert sunlight into electricity at impressive 20 percent efficiencies, the cost of this solar power is prohibitive for large-scale use. Researchers with the Lawrence Berkeley National Laboratory (Berkeley Lab), however, are developing a new approach that could substantially...

2010-02-26 09:30:31

Researchers at the University of Pennsylvania, the University of Wisconsin-Madison and IBM Research-Zrich have fabricated an ultra sharp, diamond-like carbon tip possessing such high strength that it is 3,000 times more wear-resistant at the nanoscale than silicon. The end result is a diamond-like carbon material mass-produced at the nanoscale that doesn't wear. The new nano-sized tip, researchers say, wears away at the rate of one atom per micrometer of sliding on a substrate of silicon...