Nanotech Impulse Radar Promises several Breakthroughs
Wednesday, September 8th, 2010
Novelda AS is a semiconductor company in Norway that has been invited by Norwegian government and Innovation Norway to exhibit its impulse radar technology at EXPO 2010 in Shanghai, China. The technology has a wide variety of applications and is being currently used and evaluated by companies around the world, according to the company’s Chief Marketing Officer.
Impulse radar is used to sense proximate objects and measure distances to them. It can, for example, be used to avoid collision with other vehicles during parking, detect intruders into homes by sensing motion and locate living persons in disaster sites by sensing breathing and heartbeat.
The nanotechnology based impulse radars can provide innovative sensor applications not possible with conventional ones. The company mentions possible applications in “human vital sign monitoring, personal security, environmental monitoring, industrial automation and other novel sensor applications.”
The Novelda Impulse Radar is a transceiver integrated into a single chip. The new technology requires no clock, thus saving on power and enhancing speed. As the sensing is done using radio waves, no lenses are required compared to technologies that require free visibility, thus saving on costs. The single chips can also be embedded into small mobile devices.
Read the news at NanotechnologyNow.
Tags: nanotech impulse radar, sensor technology
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Planes that Mimic Birds
Thursday, August 26th, 2010
Planes that Mimic Birds
Aerospace vehicles are currently designed for specific missions, such as space flight, reconnaissance, interdiction and aerial combat. A vehicle designed for one mission will typically have serious constraints for executing other missions. Researchers have been looking at ways to design multi-mission capable vehicles.
The solution of variable sweep wings is an example of a preliminary solution to the problem. The wings change shape to meet changing requirements, trying to mimic birds in flight. However, the existing solution is only a primitive one compared to the birds’ solution.
Things might change dramatically with the new morphing metal technology. Nanotechnology can theoretically work at molecular levels and change the properties of the building blocks of materials. Doing this “on-the-go”, adapting to changes in pressure or temperature for example, can make the materials almost “living materials.”
Wings made of such materials could then unfurl, bend and shape themselves to changing demands, just as bird wings do in flight. Such wings will be able to avoid aerodynamic destabilization caused by varying flight conditions.
Once such morphing technology has been mastered, it will be possible to design air vehicles that can be used for multiple roles, say from passenger or cargo carriage to aerial warfare.
Read the speculative report at Center for Intelligence News Study.
Tags: air vehicles, changing material properties, nanotechnology
Posted in nanomaterials, nanotechnology | 1 Comment »
Breakthrough in Scanning Probe Microscopy (SPM)
Monday, August 23rd, 2010
Scanning Probe Microscopy creates images with the help of a physical probe that scans the specimen surface. As the probe scans the specimen line by line, the position of the probe is recorded to create the image. SPM helps study invisible specimens such as individual atoms and objects of nanometer scale.
Conventional SPM operates at only one frequency at a time. This is a serious limitation because probe-specimen surface interactions are dynamic and only by knowing how the interaction varies at many frequencies can one get a fuller picture.
A breakthrough has now been achieved by Asylum Research and Oak Ridge National Laboratory (ORNL) in this area. Band Excitation (BE) is a new SPM technology that involves exciting and detecting the tip dynamics at many frequencies simultaneously. This has been compared to seeing in color instead of just in black and white.
Band Excitation allows more rapid probing of energy dissipation at nanoscale “enabling scientists to characterize a sample’s electrical, magnetic, and mechanical energy conversion and dissipation properties at standard imaging rates.” Information about energy dissipation is important in diverse fields such as electronics, information technology and energy storage/transport.
The inventors hope that BE will bring in a new family of SPMs.
Asylum Research and ORNL has been awarded the Microscopy Today Innovation Award for the breakthrough. Read the news at Nanowerk.
Tags: nanotechnology, scanning at multiple frequencies, SPM
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Nanotechnology – Considerations for Safe Development
Tuesday, August 17th, 2010
Office of Technical Assistance & Technology, Massachusetts Government, has released a document with the above title. As the preamble of the document says, Nanotechnology offers great promise in different industries such as biomedical devices, clean energy technology and materials engineering. Along with the promise come indications that the invisibly small nanoparticles, both incidental and engineered, can cause harm to living beings.
The particles can cause respiratory ailments through inhalation, get absorbed into the bloodstream and even pass the blood-brain barrier with potential harm to neurological system. DNA damage has been reported from exposure to titanium dioxide nanoparticles. The overall conclusion from health and safety research is that material risks may accompany the development of nanotechnologies.
It is in this context that precautionary steps during research and development become important. This has become particularly critical as billions of dollars are being invested in nanotechnology development in US alone (not to mention many other countries across the world). Focusing only on the promise and ignoring the potential for harm that these initiatives pose are things that no responsible government or entity can allow.
Studies have indicated that while many companies have implemented nanosafety practices, several others have not. It is thus necessary to create greater awareness about the issue among managers, supervisors and health & safety officers.
You can download the nanotechnology safety considerations document from Massachusetts Government website.
Tags: engineered materials, nanoparticles, nanotech health issues, nanotechnology
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Nanoparticles: What are the Risks?
Saturday, August 7th, 2010
Do you know that we could be breathing in four billion nanoparticles per minute? And be none the worse for it? There are numerous sources of such particles in everyday living, and our lungs have learned to cope with these and we continue to live (and prosper).
Does that mean that nanoparticles, natural and engineered, are absolutely safe? Hardly. Asbestos fiber has caused deaths in hundreds of thousands. Even the London smog has caused deaths estimated at a few thousands in one year. Apparently, the capacity of our lungs to tolerate air-borne particles is limited.
There is also the fact that unlike naturally occurring particles, to which our lungs have become accustomed over a long period, engineered nanoparticles are something new which our lungs have no experience of. Just like engineered chemicals, our body might not be all that ready to deal with the new particles.
Dosages can also matter. A single nanoparticle, even if somewhat dangerous, might not have any impact on our health. Even a billion nanoparticles do not amount to much in terms of substance. However, when the substantial content of the nanoparticles absorbed increase, even otherwise harmless particles might become toxic.
These and other interesting thoughts are the content of a recent post at 2020science.org.
Tags: health risks, nanoparticles, nanotechnology
Posted in health risks, nanotechnology | 1 Comment »
A Comprehensive Look at Nanotechnology
Thursday, August 5th, 2010
EmeraldInsight produces the Foresight journal. In issue 6 of volume 6 of the journal, there is a conceptual paper that takes a comprehensive look at nanotechnology, tagged as the technology of the twenty first century.
Did you know that nanotechnology is a convergence of physics, chemistry and biology? It has already developed applications in all these fields, e.g. microelectronics (physics) that can lead to extremely small computing devices; new catalysts, membranes, sensors and coatings (chemistry) that involve tailoring atoms and molecules to customized needs; and working with micro and nano sized sub-units of living systems (biology) to create new devices.
The interdisciplinary nature of nanotechnology poses problems to researchers and changing traditional researcher mindsets is considered a significant issue in nanotech research. Nanotech researchers typically need interdisciplinary skills.
The innovative applications potential of this new technology can be illustrated with a few examples. In biotechnology, nano-sized enzymes, which are living organisms, can be combined with inorganic devices such as silicon chips to produce an implantable device that can monitor the health of the organism, human or animal. Quantum computers using quantum dots (a nanostructure) can provide a solution to the physical limitation of miniaturization of chips.
Read about these and other potential applications of nanotechnology at Emerald Insight Nanotechnology Concept Paper.
Tags: interdisciplinary technology, nanotech applications, nanotechnology
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Harvesting Solar Energy Using Nanotechnology
Saturday, July 31st, 2010
Solar energy is still only a promise as costs are still uneconomic compared to conventional (and generally eco-unfriendly) electricity generation methods. Many are looking to nanotechnology to provide economic solutions.
It had been observed that single-walled carbon nanotubes (SWCNTs) absorb light strongly and convert the light into heat. SWCNTs are particularly sensitive to light in the near-infrared (NIR) region. This effect has already been used in cancer treatment.
Researchers in China have now discovered that the heat can be converted into electricity. This involved exposing NIR light to buckypapers, i.e. thin sheets made from aggregates of carbon nanotubes. The experiment showed that SWCNT sheets are potentially good IR sensors.
By integrating a large number of two different types of SWCNT sheets (p-type and n-type) in a series to fabricate the power source, a significantly higher voltage output was obtained by the researchers. The output was a macroscopic voltage exceeding 0.1 V. The conclusion of the researchers is that by integrating more elements, larger outputs can be obtained.
The researchers hope that by optimizing the sheet structure, performance can be improved. Other scientific problems also need to be tackled before a practical device for harvesting solar energy or sensing infrared is developed.
Read the news at NanoWerk Spotlight.
Tags: nanotech energy solutions, nanotechnology, solar energy harvesting
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Nanofiber from Cellulose: Keynote Topic at Nanotech Conference
Wednesday, July 28th, 2010
Nanofibers have a diameter of 100 nanometers or less. Textiles and filters made of nanofibers have better functionality compared to traditional materials. The potential for their applications are wide, as a few illustrative examples below show:
* Medical applications in tissue engineering and artificial organs
* Protective masks against chemical and biological attacks
* Textile applications for different kinds of specialized apparel, including baby diapers
* Filters used in different industries and systems
* Napkins with antibodies against biohazards
Nanofibers can potentially be made to assemble at injury sites and also to self-braid, making them ideas in certain applications.
Nanofibers can be made from different materials, both organic and inorganic. Carbon nanofibers, “ceramic” nanofibers from materials such as silicon dixide and nanofibers from cellulose are examples.
The 2010 International Conference on Nanotechnology for the Forest Products Industry to be held during September 27-29, 2010 at the Dipoli Congress Centre in Espoo, Finland. The conference, which has the theme “Getting Down to Business with Nanotech Products” will have a keynote presentation from Dr. Hiroyuki Yano on the “Potential of Cellulose Nanofiber-Based Materials.” Dr. Yano is a Professor at the Research Institute of Sustainable Humanosphere, Kyoto University, who received a Ph.D. in wood science from the university in 1989.
Read the conference announcement at TAPPI website.
Tags: nanofiber, nanotech conference, nanotechnology
Posted in nanomaterials, nanotechnology | 2 Comments »
Miniaturization Applications with Nanotechnology
Monday, July 19th, 2010
A nanometer is one-billionth of a meter and objects of nanoscale are invisible to the human eye. Yet these invisible objects could be of immense use in different areas. Some recent developments at the University of Utah point to some of these possibilities.
One researcher is developing a nanotech torch that is invisible but could make it possible to avoid the waste incurred during the production of electronic chips. By depositing and erasing materials at the precise locations where they are needed, not only is waste avoided but the size of the chip also gets much smaller.
With these small chips, it becomes possible to develop much more compact devices such as GPS units and cell phones.
The Utah University team is also developing a nano tuning fork that can help reduce power consumption. These are nanoscale mechanical switches that can, for example, prevent laptop computers from overheating, eliminate wasted energy and keep the battery charged for longer periods.
The research team at the university has received a $3 million, three year federal DARPA grant for nanotechnology research and the faculty in the Department of Electrical and Computer Engineering working on these projects constitute the Wireless Nanosystems research team.
Read the news at UtahPulse.
Tags: eliminating waste, energy efficiency, nano device, nanotechnology
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Knowledge Society and Nanotechnology
Saturday, July 17th, 2010
Knowledge society is a society where the primary production resource is knowledge, rather than capital, labor or even raw materials. In such societies, accumulated and newly discovered knowledge will be the dominant element supporting not only economic but also social and cultural activities. If one looks around modern societies, one can observe the huge volume of knowledge that underlies almost everything we do, including how we think.
Knowledge supporting community activity is not something new. Even ancient tribes observed, acquired and passed on knowledge about weather patterns and about the best practices for obtaining desired results. Activities like agriculture and fishing benefited from such knowledge. What is different in modern times is the huge volume of knowledge, the ease of sharing it globally and the elimination of the need for geographical proximity for knowledge societies to arise.
As against physical meeting places and bulletin boards, it is Web portals, chat rooms, video conferences and other information distribution and collaboration environments that dominate the modern scenario.
Validating the results of scientific research through economic achievements that benefit members of the society has become a major topic of study.
Nanotechnology is a field in which many countries, including developing countries, have invested heavily. It is a field with many promises, and also many unknown risks. It is in such a context that many conferences and movements are focusing on nanotechnology.
The article on Nanotechnology for a Knowledge Society in Emerging Economies and Developing Countries discusses this concern.
Tags: economic development, nanotechnology
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