Taking cues from DNA research, photosynthesis, and nanotechnologies, a team at the University of Toronto has engineered a new kind of “artificial molecule” that can be assembled into wholly new classes of nanomaterials, including one that can direct and control energy absorbed from light. They’ve basically built a self-assembling antenna for light out of quantum dots that could lead to wholly new ways of manipulating and harvesting light energy.
Quantum dots are those tiny pieces (like, nano-tiny) of semiconductor that can be customized to efficiently absorb and emit light in finely-tuned ways. They are interesting little particles, but thus far scientists haven’t really found a good way to coax different kinds of quantum dots into forming complex structures.
That’s really the major breakthrough here. Mashing up their knowledge of DNA and semiconductors, they devised a way to get these quantum dots to self organize. Says Ted Sargent, U. of Toronto professor and one of the research leads, in a press release:The credit for this remarkable result actually goes to DNA: its high degree of specificity – its willingness to bind only to a complementary sequence – enabled us to build rationally-engineered, designer structures out of nanomaterials. The amazing thing is that our antennas built themselves – we coated different classes of nanoparticles with selected sequences of DNA, combined the different families in one beaker, and nature took its course. The result is a beautiful new set of self-assembled materials with exciting properties.
Just like radio antennas, the materials gather their medium--in this case light rather than electromagnetic wave--and increase the amount that is absorbed, channeling it to a single site within the structures where it can be concentrated. Plant leaves already do this and have been doing it for millennia, but this is the first time researchers have finessed nanoparticles into assembling themselves into similar structures. The result is a completely new generation of materials that potentially possess completely new applications.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.


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this is awesome
Wondering if these "quantum dots" could be arranged in a fashion to Absorb/Block/Redirect Cosmic Radiation..
Any Thoughts
Agreed, this is awesome. One step closer to efficient solar energy!
Now if only we could coax virtual photons to become real photons will less energy than they'll release when absorbed into this "light antennas."
My idea for a zero point module:
A cylinder with the internal wall lined with these light antennae. A tube in the middle of that cylinder somehow (I haven't figured it out yet) coaxes virtual photons to become real photons. As those photons stream outward from the center they get absorbed into the antennae, and fed to a light/electricity converter (we already have these). The light is converted directly to electricity, some of that electricity is fed back into the process (to power the jump of virtual photons and any other equipment that might be involved in the operation of this machine), and what is left over is fed into a grid...
The more photons being output inside the cylinder, the more energy produced. Clean, safe, portable energy that is limitless... with no moving parts the machine might never break either.
Want to stop the process, disconnect the cylinder from the "recharge" wire.
So cool, an excelent first step to harrness the true power or our sun. Collect the solor power and use these to beem the power to an earth staiton and power the grid........wow, so very cool. Keep up the good work fellas.
eat your heart out, photovoltaic cells.
As I read this i keep thinking....lightsabers? 0_o?
Amazing work...
"in this case light rather than electromagnetic wave"
light equals electromagnetic radiation, right?
"Plant leaves already do this and have been doing it for millennia". Strange I thought plants leaves have been doing this a bit longer then thousands of years.
I wonder what the efficiency is in comparison to current techniques.
@lawsonrw -- I'd be interested to see what these light antenna do when exposed to an oscillating electromagnetic field, say, from an inductor... as for maintain the oscillation, maybe an Armstrong oscillator that incorporated the inductor and power from the light antenna would do the trick.
@Kehvan
I had envisioned using the casimir effect to stir up v-photons, but as of yet there is no reliable, low power method to get those v-photons to make the jump into the real world and be consumed as energy in a direct way. But now that I think about it, I wonder if the decay of radioactive particles might do it... imagine casimir plates with the inner facing walls lined with a film of americium or some other radioactive element (even if only weakly so). I wonder if that ionizing radiation would open the flood gates on virtual photons, creating "star in a bottle."
@lawsonrw -- well, I decided to not think too deeply when I bit your hook, so I didn't try to refute or critically analyze your idea too much, but ultimately I see no real need to create virtual photons. What it sounds like you're looking for is a light amplifier with regenerative qualities. None of what you describe though could be thought of as a "zero point module" from Stargate canon. A ZPM uses vacuum energy. What you're describing uses photons, thus EM energy.
Would any of you that are far more familiar with these concepts be able to describe how the DNA is actually bound to the individual quantum dots?
@Swabby -- To quote the article, "The amazing thing is that our antennas built themselves – we coated different classes of nanoparticles with selected sequences of DNA, combined the different families in one beaker, and nature took its course."