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Archive for the 'Research' Category

Carbyne: the strongest, stiffest carbon chain

Posted by Stephanie C on October 11th, 2013

Carbyne – a straight line of carbon atoms linked by double bonds or by alternating single and triple bonds — is the next stiff, carbon-based structure with unusual and desirable properties. It has been observed under limited natural and experimental conditions, is expected to be difficult to synthesize and store, and now has been theoretically [...]

Nanotubes aren't stiff if they aren't straight

Posted by Stephanie C on October 3rd, 2013

Materials scientists have pursued the question of why vertically aligned carbon nanotube forests show much lower modulus values than expected. Now researchers from Georgia Tech have found that the nanotubes they fabricate contain kinks that dramatically diminish modulus value. In other words, the nanotubes are not straight; therefore, they are not stiff. The government-funded research [...]

Computational design of protein-small molecule interactions

Posted by Jim Lewis on September 26th, 2013

A major advance in the computational design of proteins that bind tightly to specific small molecules will facilitate several technologies, possibly including the development of atomically precise manufacturing.

Circuits of graphitic nanoribbons grown from aligned DNA templates

Posted by Jim Lewis on September 17th, 2013

How complex could circuits be made using precisely positioned DNA nanostructures as templates to grow graphene nanoribbons?

Precise mechanical manipulation of individual long DNA molecules

Posted by Jim Lewis on September 12th, 2013

“Molecular threading”, a nanotechnology developed by Halcyon Molecular and now owned by Aeon Biowares, enables precise placement of individual long molecules of DNA, either for sequencing or for nanofabrication of novel DNA nanostructures.

Conference video: Assembly and Manipulation of Molecules at the Atomic Scale

Posted by Jim Lewis on August 29th, 2013

At the 2013 Conference the winner of the 2011 Feynman Prize for Experimental work presents STM studies showing how the manipulation of single molecules on a surface can yield insights to their mechanical, electronic, and optical properties, and be used in a controlled way to build pre-defined molecular architectures.

Next Foresight Conference on Nanotechnology in February 2014

Posted by Jim Lewis on August 28th, 2013

The Conference to be held February 7-9, 2014 in Palo Alto, California will emphasize the integration of nano-engineered devices and materials into larger, more complex systems.

Warped graphene molecules offer new building blocks for nanotechnology

Posted by Jim Lewis on August 26th, 2013

Graphene molecules a bit more than one nanometer across and greatly distorted from planarity have altered properties and offer novel building blocks for nanotechnology.

Illuminating Atomic Precision Conference videos

Posted by Jim Lewis on August 23rd, 2013

A limited set of videos from the January 2013 Foresight Conference have been made available. John Randall started the Conference presentations describing the patterned silicon Atomic Layer Epitaxy (ALE) approach to atomically precise manufacturing.

Nanocrystal-in-glass composite controlled by voltage

Posted by Jim Lewis on August 23rd, 2013

Covalent bonding of nanocrystals into a glass makes the glass ‘smart’ enough to transmit heat, light, both, or neither as desired.

Improved molecular targeting via cellular automata

Posted by Stephanie C on August 12th, 2013

In simplest terms, cellular automata can be thought of as groups of ‘cells’ in which the state of an individual cell will flip depending on the states of its neighbors. A ‘cell’ can be a pixel, a molecule, etc. The mathematical rules associated with cellular automation are complex and have been applied to fields as [...]

Molecular sponges give atomic structures of trace substances

Posted by Jim Lewis on August 8th, 2013

A porous metal-organic framework ‘host’ soaks up molecular ‘guests’ to form a crystalline complex, the structure of which can be determined by X-ray crystallography, providing atomic-resolution structures of minute amounts of guest molecules, and perhaps eventually other nanostructures.

Nanoscale box aids single-molecule optical detection

Posted by Stephanie C on July 29th, 2013

Good old fashioned boxes are here to stay, even in the context of nanoscale devices. Across a broad range of technologies and size regimes, boxes serve as containers for components, barriers against contaminants and/or radiation, and, as in the case of cell membranes, can be permeable to allow selected interactions between the interior and exterior. [...]

DNA nanotechnology positions components to optimize single-molecule fluorescence

Posted by Jim Lewis on July 19th, 2013

A pillar constructed and positioned using DNA nanotechnology holds two gold nanoparticles and a dye molecule to enhance fluorescence over a hundred fold.

Reviews of DNA nanotechnology-atomically precise microscale objects

Posted by Jim Lewis on July 9th, 2013

Two open access reviews portray the widening approach of DNA nanotechnology toward more complex atomically precise systems.

DNA nanotechnology builds solar energy antenna

Posted by Jim Lewis on June 21st, 2013

A simple DNA scaffold organizes light-collecting molecules for artificial photosynthesis.

Mass production of higher quality oligonucleotides to spur DNA nanotechnology

Posted by Jim Lewis on June 6th, 2013

Biotechnology-based isolation and amplification of sequence-verified clones of DNA oligonucleotides will provide longer and less expensive materials for building complex DNA nanostructures and nanomachinery.

Quantum dot conduction impacted by stoichiometry, not dangling bonds

Posted by Stephanie C on May 29th, 2013

Quantum dots are semiconducting, nanoscale clusters that show electronic characteristics distinct from both bulk-scale materials and single molecules. Their special characteristics make quantum dots attractive for a broad range of potential applications, including photovoltaics and nanoscale transistors. The size and shape of quantum dots impact electrical properties and can therefore be used to tune the [...]

Germanane: germanium's answer to graphane

Posted by Stephanie C on May 15th, 2013

Soon after graphene sheets were being produced on a laboratory scale routinely, researchers began producing the hydrogenated version graphane (with a hydrogen atom on each carbon). This step is one of many approaches aimed at harnessing graphene’s powerful conductivity and is also being explored for hydrogen storage and other potential applications (more info in this [...]

Silicene: silicon's answer to graphene

Posted by Stephanie C on May 1st, 2013

**Updates: July 2014 — Research out of Argonne National Lab suggested that silicene may have never actually been successfully synthesized, rather that spectra indicate a mixture of silicon and silicon-substrate alloy; see article on August 2014 — Research out of Italy suggests that their spectra establish the presence of silicene though not in a [...]