They power countless portable devices, start cars and drive electric vehicles.
Yet they’re not particularly efficient. In research labs more efficient batteries are being developed.
They infect cells to cause disease. We’re forever battling them, trying to find better ways to rid ourselves of them.
Yet in research labs around the world scientists try put viruses to use, as agents to deliver genes, to provide antigens for vaccines.
And, in seems, to make more efficient batteries.
Yes you read that correctly: viruses are being used to make more efficient batteries. Solar cells, too.
Just out from this research group is another paper that describes the latest in this line of work, solar cells (Virus-templated self-assembled single-walled carbon nanotubes for highly efficient electron collection in photovoltaic devices, subscription access only).
I don’t have access to this journal to offer my own account of these projects from the research papers, as I’d like to. (Besides, I’m shattered from working on the house.) You might try an ‘popular science’ account of the new solar cell work at ArsTechnica and an earlier article on their batteries (also from ArsTechnica).
The basic idea behind this work is that you can take proteins that already have some useful shapes or properties and modify them to create something of use to you. You modify the protein by modifying the gene that codes for the protein.
As one example, in her talk she uses a virus that infects bacteria (a bacteriophage) that forms small tubes through a protein repeatedly packing itself together with a spiral of DNA on the inside of the tube — a natural nanotube.
You might then try modifying the portion of the protein that is on the outside of the tube to bind something you’d like to be bound to a nanotube – she talks about randomising a portion of the protein and selecting any of the randomised variants that bound to her target.
This could then be used as a scaffold to hold onto other molecules, or as a template to build something (for example a nanowire).
I’m afraid I’m out of time to work up a full explanation for you, but I hope this brief note and the ArsTechnica articles linked above might give you some notion of what is being done here.
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