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Nanotechnology Spotlight

Behind the buzz and beyond the hype:
Our Nanowerk-exclusive feature articles

Showing Spotlights 1545 - 1552 of 1603 in category All (newest first):

 

A new nanofabrication method to make polymer microlenses

Researchers in Israel demonstrated a new technique for creating polymer microlenses. While current processes employed for manufacturing large microlens arrays are not compatible with the need to place single microlenses in very precise, strategic locations (such as an intersection of two nanochannels, for example) the Israeli group's method is specifically designed to do so. They deposit small drops of monomer solution with a nanopipette, mounted as an AFM probe (nano fountain pen, or NFP), and subsequently polymerize them, to yield microlenses. Their technique could ultimately lead to nano-biochips with integrated polymer optics.

Posted: May 3rd, 2006

Converting carbon nanotubes into diamonds

Carbon nanotubes have been converted to diamonds before but a group of researchers in the PR China and the UK now managed to do this at a very low pressure of only 80 megapascal.

Posted: May 2nd, 2006

Magnetite-labeled carbon nanohorns as low-toxicity MRI agents

Notwithstanding all the recent publicity about the presumed or actual toxicity of nanomaterials, the detailed pharmacological knowledge of any nanomaterial is important in order to assess its level of toxicity in the living body. While in vivo toxicity assessment of carbon nanotubes (CNTs) is still at the early stage, research in this area is well underway.

Posted: Apr 28th, 2006

A practical method for the production of hollow carbon onion nanoparticles

Carbon onions, which are made of concentric graphene spherical shells, are a potential solid lubricant similar to Tungstenite (WS2) nanoparticles having an onion-like structure. In addition, carbon onion nanoparticles are expected to have good prospects for other applications, such as the reinforcement of composite materials, magnetic storage media and wear-resistant materials.

Posted: Apr 27th, 2006

Thermolithography: Nanomanufacturing under heat

Lithography is a critical enabling technology for manufacturing nanoscale devices and structures. Suppose nanolithography tools cost just a few thousand dollars a piece instead of a few million dollars. These cheap tools would wide open the fields of nanotechnology to practically every university and industry researcher interested in the field.

Posted: Apr 26th, 2006

Nanowerk interview with Ted Sargent

Nanowerk spoke with Professor Ted Sargent, professor and Canada Research Chair in Nanotechnology at the University of Toronto and author of the recently published and highly acclaimed book The Dance of the Molecules.

Posted: Apr 25th, 2006

The interesting transport properties of SWNT nanorings

As a novel superstructure, single-walled carbon nanorings exhibit interesting transport properties, such as Aharonov-Bohm effects, magnetotransport or establishment of persistent currents. Researchers in China have developed a new technique to produce large quantities of small-diameter single-walled carbon nanotube (SWNT) nanorings.

Posted: Apr 24th, 2006