Original Article from EDN Magazine Online (Link)
By Matthew Miller — EDN, 2/28/2008
Researchers at the Georgia Institute of Technology have developed a textile-based generator that could enable garments to convert the wearer’s movement into electricity to power personal electronic devices.
The researchers coax billions of zinc-oxide nanowires to grow radially from a Kevlar fiber, yielding a structure they liken to a bottle brush. A generator features two such fibers arranged in parallel. One of the fibers gets an additional coating of gold that allows it to serve as the electrode. Employing the same basic principles as an earlier harvester, the generator creates electrical energy via the piezoelectric effect when movement causes the two fibers to rub together (see “Energy harvester generates continuous nanoampere current,” EDN, May 24, 2007).
The researchers have measured 4 nA of current and 4 mV of output voltage from a generator employing 1-cm fibers. They estimate that, with design improvements, a square meter of fabric should be able to generate 80 mW. One major barrier to commercialization remains, the team admits: Zinc-oxide is vulnerable to water, so the technology still needs a mechanism for washing-machine survival.
U.S. researchers have used a new technique named cryo-EM (short for ‘Electron cryomicroscopy) to capture images of a virus at a resolution of 4.5 angstroms — less than half of a nanometer. As said the lead researcher, ‘This is the highest resolution ever achieved for a living organism of this size.’ The team thinks this should help to develop new disease treatments. Of course, this kind of research has a cost. It requires high-end electron microscopes and powerful computing resources. The next microscope used for this project will be installed in 2009 for a cool $2 million. And in order to generate the 3-D images at this very high resolution with their current microscope, the research team used the power of 7,000 computers at Purdue University. But read more…
You can see above an image of the bacteriophage Epsilon15 studied by Wen Jiang. On the left, the bacteriophage which has approximative diameter of 700 angstroms is shown at a resolution of 4.5 angstroms — the highest resolution achieved for a living organism of this size. On the right are shown “seven subunits in an asymmetric unit, annotated in different colours. Each subunit contains one copy of [baseplate proteins gp7 and gp10? (Credit: Wen Jiang lab, via Nature). Here is a link to a larger and better version of the image on the top left.
This research project has been led by Wen Jiang, an assistant professor in the Department of Biological Sciences at Purdue University, and members of his research group. “In addition to Jiang, Matthew L. Baker, Joanita Jakana and Wah Chiu from Baylor College of Medicine, and Peter R. Weigele and Jonathan King from Massachusetts Institute of Technology worked on the project.”
Now, let’s look at the advantages brought by the cryo-EM imaging technique. “The imaging technique, called cryo-EM, has the added benefit of maintaining the sample being studied in a state very similar to its natural environment. Other imaging techniques used regularly, such as X-ray crystallography, require the sample be manipulated. ‘This method offers a new approach for modeling the structure of proteins in other macromolecular assemblies, such as DNA, at near-native states,’ Jiang said. ‘The sample is purified in a solution that is very similar to the environment that would be found in a host cell. It is as if the virus is frozen in glass and it is alive and infectious while we examine it.’”
And why is this imaging technique different from other ones currently used? “In electron microscopy, a beam of electrons takes the place of the light beam used in a conventional microscope. The use of electrons instead of light allows the microscope to “see” in much greater detail. Cryo-EM cools specimens to temperatures well below the freezing point of water. This decreases damage from the electron beam and allows the specimens to be examined for a longer period of time. Longer exposure time allows for sharper, more detailed images.”
For more information, this research work has been published in a recent issue of Nature under the title “Backbone structure of the infectious 15 virus capsid revealed by electron cryomicroscopy” (Volume 451, Number 7182, Pages 1130-1134, February 28, 2008). Here is a link to the abstract. The images above have been extracted from this page.
Sources: Purdue University News, March 5, 2008; and various websites
Clean Edge has finished their Report Entitled “Clean Energy Trends 2008″. You can get your pdf copy here.
An excerpt:
Further proof of clean tech’s move from marginalized to mainstream is abundant. A growing number of governments announced plans to generate electricity from renewables. Corporations continued to jump on, if not lead, the race to transition to a cleaner, greener economy. Venture capitalists in the U.S. invested $2.7 billion in the clean-energy sector, representing more than 9 percent of total VC activity. Cleanenergy indices outpaced the broader markets in 2007. For example, the NASDAQ® Clean Edge® U.S. Liquid Series index (co-developed by Clean Edge and NASDAQ) was up 66.67 percent last year, compared with 3.53 percent for the S&P 500 index and 9.81 percent for the NASDAQ Composite index.
According to Clean Edge research:
Biofuels (global production and wholesale pricing of ethanol and biodiesel) reached $25.4 billion in 2007 and are projected to grow to $81.1 billion by 2017. In 2007 the global biofuels market consisted of more than 13 billion gallons of ethanol and 2 billion gallons of biodiesel production worldwide.
Wind power (new installation capital costs) is projected to expand from $30.1 billion in 2007 to $83.4 billion in 2017. Last year’s global wind power installations reached a record 20,000 MW, equivalent to 20 large-size 1 GW conventional power plants.
Solar photovoltaics (including modules, system components, and installation) will grow from a $20.3 billion industry in 2007 to $74 billion by 2017. Annual installations were just shy of 3 GW worldwide, up nearly 500 percent from just four years earlier.
The fuel cell and distributed hydrogen market will grow from a $1.5 billion industry (primarily for research contracts and demonstration and test units) to $16 billion over the next decade.
Together, we project these four benchmark technologies, which equaled $55.4 billion in 2006 and expanded 40 percent to $77.3 billion in 2007, to grow to $254.5 billion within a decade.
For those of you that might be interested in the wind sector in particular or clean energy in generatl, the latest issue of Renewable Energy World has a couple of great articles worth the read:
It you work in a materials business like I do you probably have noted the emergence of eco-friendly or green products pushed in the marketplace. Working in a company that has had a eco-slant for quite some time now it is interesting to see the up-tick in awareness in green/eco. I am still a little cautious of green for green’s sake, but have had an awakening per se recently after listening the Ted Talk below. The talk in question was by John Doerr entitled “Seeking Salvation and profit in greentech”.
John Doerr is quite a legend in the VC community and has helped to fund many startups that are now in the common venacular (Amazon, Netscape, Google, and Compaq for instance) as a partner in Kleiner Perkins Caufield & Byers. His Bio is is here is you are interested in learning more. He goes so far as to say that “going green may be the “biggest economic opportunity of the 21st century.” His theme of the talk centers around the situation that our actions have put us in and that he absolutely thinks that we must correct the problems we have created in the past century with mismanagement of our environment. What is really refreshing in his talk is that he does not think that legislation alone will bring the change needed. He urges that the real solution to our plight is the combination of greentech and business acumen. Greentech that also saves money is the key to widespread adoption. He cites a few early examples of this. Listen to the talk and see what you think. Then analyze in what areas of your business can you create and sell solutions that not only make sense from a financial point of view but also from an environmental point of view?
I finally had a few minuted to breath and think today and what a timely arrival was the latest email from TEDTalks in my inbox. I have heard a great number of mentions on “cradle to cradle” design over the past couple of years. Most of this in a negative or absurd light as what some people consider a knee jerk reaction and unrealistic for a real manufacturing society. As I am almost never dissapointed by TED, I listened to the embedded talk below. (Click Here if your corporation blocks embedded video)
For those of you that may not be familiar with William McDonough here is an introduction from the TEDTalk site that might give you a little insight.
“Architect and designer William McDonough asks what our buildings and products would look like if designers took into account “All children, all species, for all time.” A tireless proponent of absolute sustainability (with a deadpan sense of humor), he explains his philosophy of “cradle to cradle” design, which bridge the needs of ecology and economics. He also shares some of his most inspiring work, including the world’s largest green roof (at the Ford plant in Dearborn, Michigan), and the entire sustainable cities he’s designing in China.”
For those of you interested in design, lifecycle, and how to couple the two, you are in luck. Check out the TEDTalk topic of “Design Like You Give a Damn“.
I was looking through some older emails today and I came to the conclusion that I have a bad habit of emailing myself links to interesting articles or newsitems I find, but not getting them out on here. So here’s and effor to catch up.
An article on Superpaper made from clay platelets. The article claims that is it will revolutionize the composites industry as it can replace high strength carbon fiber or even sheets of nanotubes. Here is the original press release for you to decide what you make of it. Considering the final material is succeptible to water it will take this plus another advancement to make it revolutionary. Here is another link from NetComposites.
Researchers at Rensselaer Polytechnic Institute and the University of Akron have developed a process for making polymer surfaces covered with carbon nanotube hairs, imitating the thousands of microscopic hairs on a gecko’s footpad.
Other researchershave new data from studying the compressive fatigue properties of carbon nanotubes and report that they are surprisingly resiliant.
Here a link to an article on Roland Piquepaille’s blog conerning some prototype electrochromic sunglasses put together by the University of Washington. What I really liked about this example is not that electrochromic materials are totally unknown as there has been significant work on them for decades. It was that they built a prototype to try it. I also see applications like sunglasses as the perfect enabling application for electrochromic materials. The fact they they are fault tolerant, non-mission critical, and bring a new axis of differentiation, and are adjacent to the “real” or “large” market. Applications like these allow for processors, material suppliers, and designers to become comfortable with a new innovation and accelerate the acceptance in the markets that will ubiquitize electrochromics (Building and Construction).
I found the presentation to be quite refreshing and eye-opening. She specializes in designing solutions for the other 90% of the world. Engineering solutions to common, but life-threatening problems in developing countries. Highlighted in the talk are designs for cleaner burning cooking fuels made from local resources that achieve equivalent performance to wood based charcoal.
For those of us that develop products or design something for a living, it was a kick in the teeth. Many of us work very hard to solve difficult problems (sometimes very niche I must admit) with some of the very latest technology at our disposal. This is a reminder of:
#1 Try to solve those problems that are important.
#2 Get your head up out of “the way” things are done and look at what works.
#3 Look at how to match your resources, methods, and economics with the environment and situation at hand.
One interesting item on the site I didn’t list above is the Nano Google Maps Mashup. One static image is shown below that shows the relative activity in Nano across the United States. At the link you can zoom in on your area and see the companies locally are working in Nano. Looking at my area, I know the data collection is not complete, but the concepts is a nice way to visualize the geographical relationships to data.
So is your company on the map? If it is you should at least check out the rest of the data at the site.
I have a couple of interesting links that people may be interested in.
My friend forwarded this transcript of a pre-commencement lecture given by Narayana Murthy (chief mentor and chairman of the board, Infosys Technologies) at the New York University (Stern School of Business) on May 9. The theme of the lecture was the great impact that chance events played in shaping his life. Quite a good lecture. It really got me thinking as to the random events that lead to long friendships, family, professional success, and perception altering moments.
I got a note in my email today with links to 3 new TED Talks.
Researchers at the Georgia Institute of Technology have developed a textile-based generator that could enable garments to convert the wearer’s movement into electricity to power personal electronic devices.
