Open menu

Nanotechnology Spotlight

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

Showing Spotlights 137 - 144 of 1602 in category (newest first):

 

The physical basis of high-throughput atomically precise manufacturing

nanotechnologyAtomically precise manufacturing (APM) can be understood through physics, engineering design principles, proof-of-concept examples, computational modeling, and parallels with familiar technologies. APM is a prospective production technology based on guiding the motion of reactive molecules to build progressively larger components and systems. Bottom-up atomic precision can enable production with unprecedented scope (in terms of product materials, components, systems, and performance), while fundamental mechanical scaling laws can enable unprecedented productivity.

Posted: Jun 11th, 2013

Cheap nanotechnology paper-based gas sensors

Nanotechnology-enabled, paper-based sensors promise to be simple, portable, disposable, low power-consuming, and inexpensive sensor devices that will find ubiquitous use in medicine, detecting explosives, toxic substances, and environmental studies. Since monitoring needs for environmental, security, and medical purposes are growing fast, the demand for sensors that are low cost, low power-consuming, high sensitivity, and selective detection is increasing as well. Paper has been recognized as a particular class of supporting matrix for accommodating sensing materials. A team of Chinese researchers has now developed low-cost gas sensors by trapping single-walled carbon nanotubes in paper and demonstrated their effectiveness by testing it on ammonia.

Posted: Jun 10th, 2013

Definition of the term 'nanomaterial'

nanomaterial_definitionIn order to regulate nanomaterials and to determine mandatory product labelling a generally accepted agreement what the term 'nanomaterial' means has to be reached beforehand. The EU Parliament requires that a definition shallbe science-based and comprehensive. Furthermore, for regulatory measures in individual sectors, it shall be unambiguous, flexible, easy and practical to handle. During the past few years various institutions came up with suggestions for a definition, leading to a recommendation of the EU commission, which finally is being accepted into new and existing EU legislation. Some provisions in this proposal are controversial and the implementation into specific sectoral legislation constitutes a major challenge.

Posted: Jun 6th, 2013

Flexible, carbon-based nanotechnology thin-film transistors

flexible_electronicsFlexible electronics are all the rage these days. They promise an entirely new design tool like for instance, tiny smartphones that wrap around our wrists, and flexible displays that fold out as newspapers or large as a television; or photovoltaic cells and reconfigurable antennas that conform to the roofs and trunks of our cars. This article reviews the progress in single-walled CNT and graphene-based flexible thin-film transistors related to material preparation, fabrication technique and transistor performance control, in order to clarify the possible scale-up methods by which mature and realistic flexible electronics could be achieved.

Posted: Jun 5th, 2013

Does the EU's chemical regulation sufficiently address nanotechnology risks?

EU_REACHThe European Commission acknowledges that nanomaterials are revolutionary materials and that important challenges exist in regard to hazard and exposure assessments. Yet, they conclude that current risk-assessment methods are applicable to nanomaterials. Scientists argue that significant changes to REACH and the accompanying annexes are required to answer the call made by the public, downstream users and progressive businesses for clearer and more definite regulatory rules specific to nanomaterials.

Posted: May 28th, 2013

Nanotechnology in sports equipment: The game changer

sports_equipmentThe degree of competitiveness in sports has been remarkably impacted by nanotechnology like any other innovative idea in materials science. Within the niche of sport equipments, nanotechnology offers a number of advantages and immense potential to improve sporting equipments making athletes safer, comfortble and more agile than ever. Baseball bats, tennis and badminton racquets, hockey sticks, racing bicycles, golf balls/clubs, skis, fly-fishing rods, archery arrows, etc. are some of the sporting equipments, whose performance and durability are being improved with the help of nanotechnology. Nanomaterials such as carbon nanotubes, silica nanoparticles, nanoclays fullerenes, etc. are being incorporated into various sports equipment to improve the performance of athletes as well as equipments.

Posted: May 27th, 2013

A pH-responsive nanoscale vaccine with tailored immune responses

copolymerNanomaterials hold promise as synthetic vaccines. They have the ability to deliver cargo to specific immune cells and modulate the resulting immune response. Compared to natural vaccine vectors, including engineered viruses or attenuated pathogens, synthetic nanoscale vaccines are safer, more controlled, and have the potential to be more effective. Nanoscale vaccines may also prevent, or even treat a wider range of diseases, including cancer. Researchers now have developed nanoscale polymer micelles that elicit both humoral and cellular immunity. The constructs could help in the fight against infectious diseases and cancer.

Posted: May 24th, 2013

Nanothermometers may aid in the treatment of cancer with heat

nanothermometerNanotechnology is helping to revolutionize cancer hyperthermia - the treatment of cancer with heat. Certain types of nanoparticles, in particular those made of gold or iron oxide, act as transducers that absorb electromagnetic radiation and generate heat. If the nanoparticles are delivered selectively to a tumour, heat can be generated within the tumour tissue by irradiating it with an external energy source. This results in heat-induced cell death within the tumor, sparing the surrounding healthy tissues. Researchers have now developed gold nanoparticles coated with a temperature-sensitive dye. The constructs allow nanoparticle-induced heating to be monitored locally.

Posted: May 23rd, 2013