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Solar Cells Nanowires

Charge Electronics with Your Shirt!

Cell phone dying Just plug it into your shirt. What have your clothes done for you lately I mean, sure they keep you warm, and they give you a style, and I guess they help prevent you from getting arrested for public nudity. But apart from that they just kind of hang there. Well not for long. We are entering the era of smart clothing, where clothes will be able to do things like clean themselves, keep you from getting sick, and maybe even charge your electronics. Now if you're like me, and you lack the basic coordination necessary to transfer salsa from.

A corn chip to your mouth without getting it all down your shirt, then have I got some good news for you. Some Australian researchers have been working on these textile fibers by coating them with titanium dioxide nanocrystals. Now these crystals, when exposed to the sun, will produce hydroxyl radicals, which will actually break down organic matter through oxidation. So steal a couple of electrons from that red wine and byebye stains! And if you're tired of smelling like an ashtray every time you go off to the club or go to.

A concert, don't worry the nanocrystals can take care of that too. But Jonathan! I hear you all say. My skin is made of organic material. Well luckily the molecules of our skin are too large for the crystals to break down, so don't worry about it dissolving you. Meanwhile, this means that we can actually conserve energy. How Well, if the shirt cleans itself we don't have to put it in a washer and a dryer. And conserving energy is cool, but what about making energy What if we could turn our style.

Into chic mini power plants. Well we can do that. All you gotta do is move! To create these clothes, scientists coat kevlar fibers with layers of zincoxide nanowires only billionths of a meter thick. Each layer of nanowires is paired with a layer of fibers coated with gold to act as an electrode. The nanowires are shaped sort of like circular hairbrushes, and when you move they rub together, which causes them to bend. Now this pressure creates electricity via the piezoelectric effect, and the gold in the neighboring layers conducts the current down to a power adaptor that connects to your.

Cell phone. In time our clothes are going to do more and more for us and that's going to change the way we think about them. And our style choices might go beyond don't wear white after labor day. Maybe we'll be thinking, Hey! It's sunny outside, I should wear my shirt with a solar panel so I can charge my phone. Or I am a total klutz, I gotta wear that sweatshirt that cleans itself all the time. They say that clothes make the man. And as out clothes do more and more, maybe we'll.

Nanowires Grown on Silicon

We use the fact that nanowires don't mind growing on any kind of substrate. So nanowire of material A will not have any problem growing on material B, although they have a big mismatch in terms of their crystal characteristics. So when you have the capability of growing anything on anything at nano scale now you can talk about enhancing silicon's capability by adding other nonsilicon high performance material on silicon. What that means is you can suddenly have capability to handle light on silicon, for silicon cannot do that. You can have high speed material on silicon.

You can have high temperature handling material on silicon and that's what we are trying to do now, integrate all these nano structures on silicon platform, and do it in large number. We call it nanomanufacturing approach. So rather than doing 1 or 2, we do a large number of them and we try to take advantage of all the additional good characteristics of this material and combine them with silicon's great capability to you know do a lot of intelligent other things and combination of them can offer you really high performance.

Smallest, fastest, energy efficient lasers

We are trying to make the worlds smallest, fastest and most energy efficient lasers. We would use them for applications ranging from telecommunications to general lighting applications. We are able to do this because we are able to make nanowires. These aren't found in nature, these are grown in a lab here. A nanowire is a crystaliron material, the size of it is smaller than the wave length of light. A nanowire is so small that with the space of a tinny hair we can fit almost more than 1,000 nanowires in.

I find it phenomenal that we can reduce nature to a few equations and using these equations we can design structures that we can't even see with our eyes. Without the team that we have we would not be able to achieve what we do. It is really a lot of work for many people. The group has wonderful ideas and wonderful technical experience and knowledge and we're able to work in fields that haven't been explored before. It's just like a big family, that we work together, we learn from each other and.

Exploring the World of Nanotechnology

M. Agarwal Nanotechnology is creation of material devices and systems through the understanding and control of matter at the dimension of nanoskin that is one, two hundred nanometer, and at that dimensions, the functionalities and property of matter changes, and we can use that for many areas of application. So, this is a nanotechnology discovery summer day camp, and here the high school students are provided with an opportunity to explore the interdisciplinary nature of nanotechnology as we all know that nanotechnology is just becoming very essential, not only in engineering, science, and medicine, but also in many other.

Navillum advances quantum nanocrystal production

Gtgt So nanocrystals are very tiny semiconductors. They are typically in the one to 10 nanometer size range. So if you have a penny, for example, the diameter of that, if you line up nanocrystals, line them up in a row, they would consist of 4 million nanocrystals. gtgt What we developed is a method of how to synthesize them really in an atombyatom fashion. And this ability really opens new avenues. It allows us to make better solar cells in the future. It should allow us to make better light emitting diodes.

Just really this large range of potential applications. gtgt So Navillum is a startup company that I started with my professor Dr. Michael Bartle. So it is based in my Ph.D. thesis. Our goal really is to help facilitate companies who are trying to produce nano crystalbased technologies and push them into market. The assistance from the Lassonde Center was very beneficial for us because otherwise we would not know exactly where to start. gtgt The Lassonde Development Center is an educational program where we bring business students with.

Science and engineering students and law school students and we combine them with university faculty who have new inventions and work with the faculty to help them commercialize their technologies. So with Navillum we met with the faculty inventors, they introduced us to the technology and at that time none of us involved knew what quantum nanocrystals were. We entered it into one of the regional department clean tech competitions and we won that competition with that. This is fun. Won $100,000. gtgt It was a very good experience for us because we got to meet with venture capitalists.

Nerve Agent Detection Sensor MconneX MichEpedia

When I was a student it's a long time ago but we developed a land mine sensor and at our meeting, I realized the need of this nerve agent detection sensor So I have thought about this for a long time and very recently, we initiated this stimuliresponsive material for biosensing application and then the combination of this development together with some general reading about this 2PAM eventually help us to develop this new sensor to detect nerve agent We basically developed, like a pH paper, paper, like, you know,.

Colormaterial sensor and the material we use is the socalled stimulisensitive conjugate polymer and depending on the external stimuli this material changes color, basically And then how we can provide the cell activity with specificity We read an article and we found that the U.S. Army used this socalled 2PAM it's an antidote and this antidote has a very specific interaction with nerve agent That's why when you inject the antidote into the body, this antidote material moves and grabs the organophosphate, the nerve agent and then remove from the body.

So we just adapt this antidote material into our paperlike material so that whenever this paper, the nerve gas paperlike material, is exposed to nerve agent, it'll change color from blue to red So that without having any big machine, with really just your spare eye, we can see the color change, so that we can detect the nerve agent So possibly this material can be used for like, security, and any government building weather building like that as an indicator So if the nerve agent is used by a terrorist.

UKs Guo Discovers New Class of Revolving Biomotor

VO A new class of revolving biomotor, discovered at the University of Kentucky, may lead to future manmade machines to pump DNA, RNA or drugs into cells. VO Previous studies have identified two types of biomotors a linear motor and a rotating motor. But a March 2013 paper in ACS Nano by Dr. Peixuan Guo proves a thirda revolving motor. VO He was looking at the motor that packages DNA into the shell of phi29, a virus that infects and kills bacteria. For 35 years scientists had been trying to prove this motor rotates,.

But Guos team found the data doesnt support that. Instead of rotating, like the earth on its axis every 24 hours, this motor is revolving, like the earth around the sun. Chad Schwartz This motor will actually push the doublestranded DNA along the inner channel of this connector, and it will hand off the substrate, hand off the DNA, as opposed to rotating. Peixuan Guo Also the motor moving is not by rotation, by friction. Its touching, touching, touching, touching, go through the cycle of the revolution, go through the channel.

By itself so theres no friction there, the conversion of energy from chemical to physical motion is very, very efficient. We can learn that from nature from this discovery and now can create a new type of motor. Chad Schwartz This revolution mechanism we do believe is common in all other types of viruses and bacteriophages, as well as different ATPases that are involved in DNA recombination, replication, and other activities that are essential to the lifecycle of a cell. VO Dr. Guos team hopes to create a synthetic version of this motor for nanomedical devices.

MIT develops RFID Chip that prevents SideChannel attacks

Researchers at MIT and Texas Instruments have developed a new type of radio frequency identification RFID chip that is virtually impossible to hack. If such chips were widely adopted, it could mean that an identity thief couldn't steal your credit card number or key card information by sitting next to you at a caf, and hightech burglars couldn't swipe expensive goods from a warehouse and replace them with dummy tags. Texas Instruments has built several prototypes of the new chip, to the researchers' specifications, and in experiments the chips have behaved as expected. The researchers presented their.

Research this week at the International SolidState Circuits Conference, in San Francisco. The chip is designed to prevent socalled sidechannel attacks. Sidechannel attacks analyze patterns of memory access or fluctuations in power usage when a device is performing a cryptographic operation, in order to extract its cryptographic key. one way to prevent sidechannel attacks is to regularly change secret keys. In that case, the RFID chip would run a randomnumber generator that would spit out a new secret key after each transaction. A central server would run the same generator, and every time an RFID.

Scanner queried the tag, it would relay the results to the server, to see if the current key was valid. Such a system would still, however, be vulnerable to a power glitch attack, in which the RFID chip's power would be repeatedly cut right before it changed its secret key. An attacker could then run the same sidechannel attack thousands of times, with the same key. Powerglitch attacks have been used to avoid limits on the number of incorrect password entries in passwordprotected devices, but RFID tags are particularly vulnerable to them,.

Since they're charged by tag readers and have no onboard power supplies. Two design innovations allow the MIT researchers' chip to prevent powerglitch attacks One is an onchip power supply whose connection to the chip circuitry would be virtually impossible to cut, and the other is a set of nonvolatile memory cells that can store whatever data the chip is working on when it begins to lose power. For both of these features, the researchers use a special type of material known as a ferroelectric crystals. Because the chip has to charge capacitors and complete computations every time it powers.

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