About the cover

November 2012 Volume 11 No 11

Solid-state sensors for the detection of heavy-metal cations require for the most part sophisticated chemistry and equipment. It is now shown that toxic cations in environmental samples can be detected with ultrahigh sensitivity and over a broad range of cation concentrations by measuring the tunnelling current across films of nanoparticles decorated with striped monolayers of organic ligands.

Article p978; News & Views p913

COVER IMAGE: THOMAS M. HERMANS, NORTHWESTERN UNIV.

COVER DESIGN: DAVID SHAND