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Nanotechnology Spotlights

Lithium-doped graphene approaches the limits of transparency and conductivity

graphene_electrodeTransparent conductive coatings pervade modern technology. They are a critical component of optoelectronic devices such as smartphone and tablet displays as well as solar cells. The search for novel transparent electrode materials with good stability, high transparency and excellent conductivity is driven by the required trade-off between transparency and conductivity. In new work, researchers now have simultaneously increased...

Posted: Jul 24, 2014

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How nanostructure geometry affects polymer photovoltaic device efficiency

nanostructureConjugated polymer based organic photovoltaic (OPV) devices have been the subject of increasing research interest over the past years due to their potential of being light weight, mechanically flexible, semitransparent. To increase the efficiency of OPV, it is necessary to achieve a precisely controlled donor-acceptor phase separation within the short exciton diffusion length without dead ends, as well as a high hole mobility...

Posted: Jul 22, 2014

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DNA sequencing reaches new lengths

nanopore_sequencing Sequencing technologies have made it cheaper and faster to read the sequence of bases on a strand of DNA. A promising technology to take these advances further is nanopore sequencing. Individual strands of DNA are moved through a nanopore gap not much wider than the DNA itself. As the DNA passes through the nanopore, continuous information is gained about the sequence of individual bases - the A, C, G and Ts that make up...

Posted: Jul 17, 2014

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Photorealistic plasmonic printing with aluminum nanostructures

plasmonic_nanosctructuresAluminum has gained interest in the field of nanoplasmonics not only because it is abundant and costs a fraction of gold or silver, but also because it allows field-enhancement effects into the ultraviolet. However, it has broader resonances than silver and gold, and forms an oxide layer. Both these effects are undesirable in applications such as biosensing, in which signal strengths are reduced in the presence of resistive...

Posted: Jul 15, 2014

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DNA nanopyramids detect and combat bacterial infection

DNA_nanopyramidOne way to eliminate the toxicity issue of synthetic nanomaterials used in nanomedicine is by working with truly biocompatible natural carriers for sensing and drug delivery applications. The emerging field of DNA nanotechnology may provide a solution. In new work, researchers have developed a novel theranostic platform which is made by utilizing a self-assembled DNA nanopyramid as scaffold for incorporation of both detection...

Posted: Jul 11, 2014

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Self-assembly machines - a vision for the future of manufacturing

self-assemblyIndustrial production processes, by and large, rely on robotic assembly lines that place, package, and connect a variety of disparate components. While the manufacturing world is dominated by robots, there are applications where the established processes of serial 'pick and place' and manipulation of single objects reach scaling limits in terms of throughput, alignment precision, and the minimal component dimension they can...

Posted: Jul 10, 2014

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Nanomaterial safety: An international collaboration on in vitro testing strategies

assayOn September 15-16, 2014, come explore ways in which Alternative Testing Strategies (ATS) may be combined to create a Weight of Evidence (WOE) or 'multiple models' approach to inform context-specific decisions about risk from exposure to novel nanoscale materials. The goal is to advance a common understanding of the state of the science, early lessons, current opportunities, and next steps for developing ATS for use in decision...

Posted: Jul 09, 2014

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A universal and rapid method for transferring nanostructures

nanowiresMany nanofabrication techniques depend on creating a structure on one substrate and then transferring it via various processes onto another, desired, substrate. Often, these methods are not generally applicable as they suffer from the process-specific drawbacks, such as for instance intolerance of transferred nanostructures to chemical etchant, and the harsh thermal environment needed. A novel universal and rapid method allows...

Posted: Jul 08, 2014

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