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Latest Nature Nanotechnology Stories

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2010-12-15 07:46:02

They say it's the little things that count, and that certainly holds true for the channels in transmembrane proteins, which are small enough to allow ions or molecules of a certain size to pass through, while keeping out larger objects. Artificial fluidic nanochannels that mimic the capabilities of transmembrane proteins are highly prized for a number of advanced technologies. However, it has been difficult to make individual artificial channels of this size "“ until now. Researchers...

2010-12-13 17:10:34

Natelson Lab pioneers technique to measure heat, dissipation at very small scales You can touch a functioning light bulb and know right away that it's hot. Ouch! But you can't touch a single molecule and get the same feedback. Rice University researchers say they have the next best thing -- a way to determine the temperature of a molecule or flowing electrons by using Raman spectroscopy combined with an optical antenna. A new paper from the lab of Douglas Natelson, a Rice professor of physics...

2010-11-15 13:34:12

The twisting, ladder-like form of the DNA molecule"”the architectural floor plan of life"”contains a universe of information critical to human health. Enormous effort has been invested in deciphering the genetic code, including, most famously, the Human Genome Project. Nevertheless, the process of reading some three-billion nucleotide "letters" to reveal an individual's full genome remains a costly and complex undertaking. Now biophysicist Stuart Lindsay, of the Biodesign...

2010-10-05 19:01:39

Smoothing the edges Researchers at the Georgia Institute of Technology have developed a new "templated growth" technique for fabricating nanometer-scale graphene devices. The method addresses what had been a significant obstacle to the use of this promising material in future generations of high-performance electronic devices. The technique involves etching patterns into the silicon carbide surfaces on which epitaxial graphene is grown. The patterns serve as templates directing the growth of...

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2010-10-05 07:32:36

The enigmatic Möbius strip has long been an object of fascination, appearing in numerous works of art, most famously a woodcut by the Dutchman M.C. Escher, in which a tribe of ants traverses the form's single, never-ending surface. Scientists at the Biodesign Institute at Arizona State University's and Department of Chemistry and Biochemistry, led by Hao Yan and Yan Liu, have now reproduced the shape on a remarkably tiny scale, joining up braid-like segments of DNA to create Möbius...

2010-09-27 14:25:42

Research demonstrates progress towards DNA strand sequencing Research published this week in Nature Nanotechnology shows a new method of enzyme-controlled movement of a single strand of DNA through a protein nanopore. The paper, by researchers at the University of California Santa Cruz (UCSC), represents a key step towards nanopore sequencing of DNA strands. The publication describes the observation of single stranded DNA (ssDNA) as it translocates through a protein nanopore, alpha hemolysin...

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2010-09-20 21:58:45

Intensity increases 1,000-fold in Rice lab's experimentEverybody who's ever used a TV, radio or cell phone knows what an antenna does: It captures the aerial signals that make those devices practical. A lab at Rice University has built an antenna that captures light in the same way, at a small scale that has big potential.Condensed matter physicist Doug Natelson and graduate student Dan Ward have found a way to make an optical antenna from two gold tips separated by a nanoscale gap that...

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2010-09-15 08:29:21

As industries and consumers increasingly seek improved battery power sources, cutting-edge microscopy performed at the Department of Energy's Oak Ridge National Laboratory is providing an unprecedented perspective on how lithium-ion batteries function. A research team led by ORNL's Nina Balke, Stephen Jesse and Sergei Kalinin has developed a new type of scanning probe microscopy called electrochemical strain microscopy (ESM) to examine the movement of lithium ions through a battery's cathode...

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2010-09-01 21:07:08

Physicists at the National Institute of Standards and Technology (NIST) have used a small crystal of ions (electrically charged atoms) to detect forces at the scale of yoctonewtons. Measurements of slight forces"”one yoctonewton is equivalent to the weight of a single copper atom on Earth"”can be useful in force microscopy, nanoscale science, and tests of fundamental physics theories.A newton is already a small unit: roughly the force of Earth's gravity on a small apple. A...

2010-08-02 16:56:29

Pens that write with light offer low-cost, rapid nanofabrication capabilities One Chicago skyline is dazzling enough. Now imagine 15,000 of them. A Northwestern University research team has done just that -- drawing 15,000 identical skylines with tiny beams of light using an innovative nanofabrication technology called beam-pen lithography (BPL). Details of the new method, which could do for nanofabrication what the desktop printer has done for printing and information transfer, will be...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'