Quantcast

Latest Nanowire Stories

4be8ba523934c8da752955568a83ed2d1
2010-09-13 06:15:00

U.S. researchers said Sunday that new artificial "skin" fashioned out of flexible semiconductor materials can sense touch, making it possible for robots to be able to grip eggs but be strong enough to hold a frying pan as well. Scientists have been struggling with a way to try and make robots be able to adjust the amount of force needed to hold different objects.  The pressure-sensitive materials are designed to help overcome that challenge. Ali Javey, an electrical engineer at the...

832fd4fc1e82b957f1db29d02a839cd8
2010-09-02 11:30:27

Strain-gating Researchers at the Georgia Institute of Technology have developed a new class of electronic logic device in which current is switched by an electric field generated by the application of mechanical strain to zinc oxide nanowires. The devices, which include transistors and diodes, could be used in nanometer-scale robotics, nano-electromechanical systems (NEMS), micro-electromechanical systems (MEMS) and microfluidic devices. The mechanical action used to initiate the strain could...

1540e8f5782b1c2d7d9b6be313bf666e1
2010-08-31 08:54:09

By dipping plain cotton cloth in a high-tech broth full of silver nanowires and carbon nanotubes, Stanford researchers have developed a new high-speed, low-cost filter that could easily be implemented to purify water in the developing world. Instead of physically trapping bacteria as most existing filters do, the new filter lets them flow on through with the water. But by the time the pathogens have passed through, they have also passed on, because the device kills them with an electrical...

05f734c72a4ac04f5222b0ae2318ea081
2010-08-12 19:47:33

Bioprobes offer first intracellular measurements with a semiconductor deviceChemists and engineers at Harvard University have fashioned nanowires into a new type of V-shaped transistor small enough to be used for sensitive probing of the interior of cells.The new device, described this week in the journal Science, is smaller than many viruses and about one-hundredth the width of the probes now used to take cellular measurements, which can be nearly as large as the cells themselves. Its...

2010-08-10 15:37:15

Just as the path of photons of light can be directed by a mirror, atoms possessing a magnetic moment can be controlled using a magnetic mirror. Research reported in the Journal of Applied Physics investigates the feasibility of using magnetic domain walls to direct and ultimately trap individual atoms in a cloud of ultracold atoms. "We are looking for ways to build magnetic systems that can manipulate atoms," says author Thomas Hayward of the University of Sheffield in the United Kingdom. "By...

8ff1f155156779ffb951aa713179c810
2010-08-02 07:44:10

NIST researchers grow nanowires made of semiconductors"”gallium nitride alloys"”by depositing atoms layer-by-layer on a silicon crystal under high vacuum. NIST has the unusual capability to produce these nanowires without using metal catalysts, thereby enhancing luminescence and reducing defects. NIST nanowires also have excellent mechanical quality factors. The latest experiments, described in Advanced Functional Materials,* maintained the purity and defect-free crystal structure...

ed9400c79c32fd125d61bfe7c85edf9d1
2010-07-29 11:11:09

Processes which lend materials new characteristics are generally complicated and therefore often rather difficult to reproduce. So surprise turns to astonishment when scientists report on new methods which not only produce outstanding results despite the fact that they use economically priced starting materials but also do not need expensive instrumentation. Just a simple framework made of polystyrene This is exactly what Jamil Elias and Laetitia Philippe of Empa's Mechanics of Materials and...

2010-07-28 14:53:20

Nanotechnology refers to a broad range of tools, techniques and applications that simply involve particles on the approximate size scale of a few to hundreds of nanometers in diameter. Particles of this size have some unique physicochemical and surface properties that lend themselves to novel uses. Indeed, advocates of nanotechnology suggest that this area of research could contribute to solutions for some of the major problems we face on the global scale such as ensuring a supply of safe...

09a83d8ade39f605654d83877db459f11
2010-07-22 09:16:49

Surface tension isn't a very powerful force, but it matters for small things "” water bugs, paint, and, it turns out, nanowires. Nanowires are so tiny that a human hair would dwarf them "” some have diameters 150 billionths of a meter. Because of their small size, surface tension that occurs during the manufacturing process pulls them together, limiting their usefulness. This is a problem because the wires are seen as a potential core element of new and more powerful...

2010-07-07 16:38:20

Imagine being able to drop a toothpick on the head of one particular person standing among 100,000 people in a stadium. It sounds impossible, yet this degree of precision at the cellular level has been demonstrated by researchers affiliated with the Johns Hopkins University Institute for NanoBioTechnology. Their study was published online in June in Nature Nanotechnology. The team used precise electrical fields as "tweezers" to guide and place gold nanowires, each about one-two hundredth the...


Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.