Quentin Cooperfinds out about nanoscale molecular traps. These 3-D honeycomb structures, a bit like self-assembly molecular Lego kits, are paving the way for hydrogen fuel cells, clearing up polluted waste streams and even creating molecular memory devices that could store the information on 100 DVDs in the space of just one square centimetre. Quentin is joined by Neil Champness , professor of chemical nanoscience at the University of Nottingham, to find out about a new generation of nano-sized test tubes. Producer Pamela Rutherford