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Nanotechnology Spotlight

Behind the buzz and beyond the hype:
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Showing Spotlights 1553 - 1560 of 1647 in category All (newest first):

 

Carbon nanotubes as nanoextruders

The ultimate internal pressure that carbon nanotubes (CNTs) can resist is only an order of magnitude below the pressure in the center of Earth. Using this high strength against internal pressure, researchers have used CNTs as pressure cells for the deformation of crystalline materials. Controlled irradiation of multiwalled CNTs can cause large pressure buildup within the nanotube cores that can plastically deform, extrude, and break solid materials that are encapsulated inside the core. Carbon nanotubes thus offer a template for use as compression/extrusion cells to study pressure-induced phase transformations and deformations of various solid nanomaterials.

Posted: Jun 26th, 2006

Understanding the growth mechanisms of nanowires

One-dimensional nanostructures such as nanowires, in particular semiconductor nanowires, have unique applications in the fabrication of nanoscale devices. How to control the growth of semiconductor nanowires is one of the most challenging issues presently faced by synthesis chemists.

Posted: Jun 23rd, 2006

A milestone towards fast DNA sequencing with nanopore devices

Setting a milestone towards fast DNA sequencing by a nanopore device, researchers developed a solid state nanopore device that can detect the difference between single molecules of double and single stranded DNA at high speed, with high accuracy, and at extreme pH. This research is a key step to develop a nanopore sequencing machine. More immediate application may be the sensing of long chain polymers for medical diagnostics.

Posted: Jun 22nd, 2006

The challenge of synthesizing magnetic nanostructures

The scientific interest in magnetic nanostructures, both from a fundamental viewpoint and also due to their potential in a wide range of applications, over the past few years has led researchers to develop various nanofabrication methods for synthesizing nanomagnets. Applications for nanomagnetic materials include non-volatile magnetic random access memory (MRAM), highly sensitive magnetic field sensor, field programmable spin logic, and patterned media for ultra high density data storage.

Posted: Jun 20th, 2006

Electrochromic devices based on tungsten oxide

An electrochromic display is one of the most attractive candidates for paper-like displays, so called electronic paper, which will be the next generation display, owing to attributes such as thin and flexible materials, low-power consumption, and fast switching times.

Posted: Jun 19th, 2006

Vibrational in situ analysis of individual molecules

Single molecule Raman spectroscopy of molecules on metal surfaces was achieved by means of optical field-enhancement from a scanning probe tip. This was made possible by the optical antenna configuration formed by optical coupling between metallic tip and the substrate.

Posted: Jun 16th, 2006

Natural polymer nanofibers for cartilage repair

Scientists at the University of Washington are developing natural polymer based nanofibers using electrospinning to mimic the native extracellular matrix of cartilage in terms of microstructure, mechanical properties, and chemical composition. This reesearch holds great implication for the generation of functional cartilage tissues to help the millions of people who suffer from degeneration of articular cartilage due to primary osteoarthritis or trauma.

Posted: Jun 15th, 2006