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Nanotechnology Spotlight

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

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Showing Spotlights 1409 - 1416 of 1649 in category (newest first):


Growing nanotechnology problems: navigating the patent labyrinth

nanowerkCarbon nanotubes (CNTs) belong to the most exciting nanomaterials discovered so far and the buzz associated with them has to do with their amazing properties. Depending on their structure, they can be metals or semiconductors. They exhibit extraordinary mechanical properties, which make them extremely strong materials with good thermal conductivity. Their tensile strength is several times that of steel. These characteristics have generated strong interest in their possible use in reinforced composites, nanoelectronics, nanomechanical devices, circuits and computers. Single-wall nanotubes (SWNTs) are an intriguing variant of carbon nanotubes because they exhibit important electrical properties that are not shared by the multi-walled carbon nanotubes (MWNT). SWNTs are the most likely candidate for miniaturizing electronics toward the nanoscale. Because of their enormous commercial potential, universities, start-ups, and corporations have aggressively sought patent protection on nanotube-based products. A recent legal paper identifies key patents claiming compositions of matter, methods of production, and products incorporating nanotubes. The authors summarize potential patent invalidity arguments that may be raised against certain patents in the field and explain how the patent landscape impacts the commercialization of nanotube-based products. A proposed "Nanotube Patent Forum" could be a means for industry to facilitate cost-effective licensing transactions between patent holders and manufacturers.

Posted: Jan 31st, 2007

Nanotechnology food coming to a fridge near you


Posted: Dec 28th, 2006

Real-time chemical warfare sensors built with nanotechnology

As their name suggests, nerve agents attack the nervous system of the human body. All such agents function the same way: by interrupting the breakdown of the neurotransmitters that signal muscles to contract, preventing them from relaxing. Nerve agents, depending on their purity, are clear and colorless or slightly colored liquids and may have no odor or a faint, sweetish smell. They evaporate at various rates and are denser than air, so they accumulate in low areas. Nerve agents include tabun(GA), sarin(GB), soman(GD), and VX. The military has a number of devices to detect nerve agent vapor and liquid. Current methods to detect nerve agents include surface acoustic wave (SAW) sensors, conducting polymer arrays, vector machines, and the most simple, color change paper sensors. Most of these systems have have certain limitations including low sensitivity and slow response times. By using readily synthesized network films of single-walled carbon nanotube bundles researchers have built a sensor capable of detecting G-series nerve agents such as Soman and Sarin (Sarin was used in the Tokyo subway terrorist attack in 1995). This research opens new opportunities in the design of real-time chemical warfare agent (CWA) sensors with independent response signatures.

Posted: Jan 29th, 2007

Metallic glass promises to become a useful material for nanotechnology fabrication


Posted: Jan 26th, 2007

Investing in nanotechnology stocks - golden opportunity or bad idea?

There seem to be an increasing number of websites, articles and investment reports that push, some might say hype, nanotechnology stocks as the next stock market super growth area. On the other hand, some investors are wary of a nanotechnology boom, where too much money chases too few listed companies, turning into a bust. Hype usually involves a bit of underlying truth about a trend but says nothing about whether something is going to be a good investment. As the International Herald Tribune put it: "While nanotechnology is spurring a revolution in electronics and medicine, investors seeking to benefit may need a lot of luck, as they did during the Internet bubble of the 1990s." The current interest in nanotech stocks is driven by the many advances that nanoscience and nanotechnology promise. The commercial realization of most of these promises lies in the (some say near, some say distant) future; things like quantum computing, molecular electronics, or lab-on-a chip medicine. In its current state, nanotechnology to a large degree takes place in labs and there is only a trickle of products coming to the market. All of these products are incremental improvements of existing products - scratch-resistant paint, better engine oil, antimicrobial household products, smaller chips, improved cosmetics, etc. What we are seeing right now is the beginning of a large technological trend and a stock buyer has to understand the difference between the many promises of nano- technologies, the research taking place today, and the actual contribution of nanotechnologies to commercial products. Let's look at a few facts that might give some perspective on what investing in nanotechnology stocks today is about - how has the market performed so far? what exactly is a "nanotechnology stock"? and the issue with these trillion dollar market size forecasts.

Posted: Jan 25th, 2007

Size-based sorting and manipulation of nanoparticles becomes possible


Posted: Jan 24th, 2007

Self-heating nanoparticles as tumor-destroying hyperthermia agents

Hyperthermia therapy, a form of cancer treatment with elevated temperature in the range of 41-45C, has been recently paid considerable attention because it is expected to significantly reduce clinical side effects compared to chemotherapy and radiotherapy and can be effectively used for killing localized or deeply seated cancer tumors. Accordingly, various forms of hyperthermia have been intensively developed for the past few decades to provide cancer clinics with more effective and advanced cancer therapy techniques. However, in spite of the enormous efforts, all the hyperthermia techniques introduced so far were found to be not effective for completely treating cancer tumors. The low heating temperature owing to the heat loss through a relatively big space gap formed between targeted cells and hyperthermia agents caused by the hard to control agent transport, as well as killing healthy cells attributed to the difficulties of cell differentiations by hyperthermia agents, are considered as the main responsibilities for the undesirable achievements. In a possible breakthrough, researchers in Singapore now report the very promising and successful self-heating temperature rising characteristics of NiFe2O4 nanoparticles. Different from conventional magnetic hyperthermia, in-vivo magnetic nanoparticle hyperthermia is expected to be one of the best solutions for killing tumor cells which are deeply seated and localized inside the human body.

Posted: Jan 23rd, 2007

Nanowire growth through ion beams


Posted: Jan 22nd, 2007