Common Paradox Tech Blog

A bacterium on its own can’t reach very far. And when stacked on the sea floor in a large colony, it may have access to either oxygen (top of the pile) or food (bottom of the pile).

So for the entire colony to thrive, the bottom and top layers must be choreographed in chemical reactions occurring across great expanses, allowing electrons from food consumption in the basement to react to oxygen from the rooftop.

A new study just published in Nature set to isolate the way bacteria pull of this stunt. The first guess, molecular diffusion, was found to be too slow for as dynamically as these colonies reacted in various testing. Now? It’s believed the bacteria use interconnected nanowires, sharing electrons across expanses 20,000 times their individual size—though to be fair, there’s no direct evidence proving the existence of said wires.

The implications for you, gadget lover? The possibility of one day using a really gross battery. [Nature via PopSci][Nanowire Image]

I switched to LED lights on my Christmas tree this year and, while generally pleased, there is no doubt that the colors are a bit “off.” A simple nanotech coating could change that by making colors brighter and warmer.

Nanosys is the company behind this new approach, and the process is fairly simple: a phospor material developed from nanomaterials is layered over standard blue LEDs (the most energy-efficient color) to create a spectrum of colors that are warmer and more vivid. So, unlike other methods (quantum dots for example), Nanosys hasn’t tried to reinvent the wheel. Manufacturers could simply apply the coating without having to start over with a completely new product.

Furthermore, Nanosys’ material could be utilized in a lot more than just light fixtures. Think about laptop and HDTV displays with better, brighter screens—all without increasing energy consumption. [Treehugger via DVICE]

jangel writes “Stanford University researchers have demonstrated a way to turn ordinary paper into a battery, which may be crumpled or pressed into any form. It’s said the technology promises greater durability, higher efficiency, and faster energy transfer than traditional batteries. The technique uses special ink made of carbon nanotubes and silver nanowires. Thanks to the small diameters of these materials, the ink sticks strongly to the fibrous paper, allowing the battery to be extremely durable. The paper battery could last through 40,000 charge-discharge cycles — at least an order of magnitude more than lithium batteries. According to the researchers, the paper batteries will be low-cost, may be crumpled or folded, and can even be soaked in acidic or basic solutions, yet their performance does not degrade. ‘We just haven’t tested what happens when you burn it,’ one of the researchers quipped.” This is the same Stanford research team, lead by Yi Cui, whose work with nanotechnology for battery applications we have discussed before. We’ve also delved into alternate routes to the holy grail of the ultra-thin battery.

Read more of this story at Slashdot.

It seems like we’re constantly hearing about promising battery technologies that could ultimately lead to longer battery life, more power, and smaller units, but as of yet, that big breakthrough hasn’t occurred. Maybe nanotechnology, which is the current hot topic in the battery innovations field, will prove to be different.

Right at this moment, a ton of research is being put into carbon nanotubes (CNTs) for a bunch of uses, including electronics and batteries. Researchers are drawn to CNTs because, according to them, carbon nanotubes are near perfect. That has paved the way for a professor and a UC San Diego graduate student to discover a breakthrough that involves introducing purposeful defects into CNT structures. By doing so, the ‘defective’ CNTs actually work better for the development of super capacitors, DailyTech reports.

"While batteries have large storage capacity, they take a long time to charge; while electrostatic capacitors can charge quickly but typically have limited capacity. However, super capacitors electrochemical capacitors incorporate the advantages of both," Professor Prabhakar Bandaru said.

The duo also discovered that other methods, such as bombarding CNTs with argon or hydrogen, could also increase or decrease the charge capacity. In the end, the two researchers believe that their discovery could ultimately lead to electronics that charge faster and last longer than what’s available today.

Image Credit: jacobsschool.ucsd.edu

It seems like we’re constantly hearing about promising battery technologies that could ultimately lead to longer battery life, more power, and smaller units, but as of yet, that big breakthrough hasn’t occurred. Maybe nanotechnology, which is the current hot topic in the battery innovations field, will prove to be different.

Right at this moment, a ton of research is being put into carbon nanotubes (CNTs) for a bunch of uses, including electronics and batteries. Researchers are drawn to CNTs because, according to them, carbon nanotubes are near perfect. That has paved the way for a professor and a UC San Diego graduate student to discover a breakthrough that involves introducing purposeful defects into CNT structures. By doing so, the ‘defective’ CNTs actually work better for the development of super capacitors, DailyTech reports.

"While batteries have large storage capacity, they take a long time to charge; while electrostatic capacitors can charge quickly but typically have limited capacity. However, super capacitors electrochemical capacitors incorporate the advantages of both," Professor Prabhakar Bandaru said.

The duo also discovered that other methods, such as bombarding CNTs with argon or hydrogen, could also increase or decrease the charge capacity. In the end, the two researchers believe that their discovery could ultimately lead to electronics that charge faster and last longer than what’s available today.

Image Credit: jacobsschool.ucsd.edu

That tiny, plastic-looking black cube up there can absorb up to 180 times its own weight in toxic waste without absorbing any water. How? As with just about every amazing and/or inexplicable scientific breakthrough nowadays, the answer is spelled N-A-N-O.

Researchers at the Peking and Tsinghua Universities have adapted carbon nanotubes into a sponge-like material which can be squeezed dry, which sounds like extremely exciting news for the infomercial cleaning product industry. One minor detail:

since carbon nanotubes are hydrophobic, there’s no modification required to make them not absorb water.

For the record, that includes mysteriously blue infomercial demo water, so there goes that. If not ABSORBING 20 TIMES AS MUCH WATER AS ITS LEADING COMPETITOR, what exactly is this new type of sponge good for? Environmental cleanup, evidently. See, instead of just dropping dispersants into the middle of an oil or chemical spill—which forces the spill to simply absorb into the water—these nanosponges could be used to sop up the spill, after which they could theoretically be wrung dry and reused, like so:

It’s an amazing idea, but I get the feeling that carbon nanotube sponges, riskily abbreviated as CNT sponges, aren’t exactly cheap. [Materials View via Treehugger]