This year's top five stories -

1. Nanoparticles inspire plasmonic solar cells

A coating of silver nanoparticles is helping to drive down the cost of solar energy.

2. Study examines nanoparticle uptake in marine ecosystems

Clams and biofilms accumulate the most nanoparticles by mass in test system.

3. Graphane makes its debut

Hydrogenating graphene produces new 2D insulator.

4. Polymer battery breaks new records

Highest charge capacity and charging rates for cellulose battery coated with nano-polypyrrole layer.

5. Helium ions etch graphene devices

New non-contact technique can produce features smaller than 10 nm.

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