About the cover

July 2012 Volume 11 No 7

Conventional sensors generate a signal that is directly proportional to the concentration of the target molecule. Now, by means of an enzyme that controls the growth of silver nanocrystals on plasmonic transducers, a nanosensor with sensitivity that is inversely proportional to concentration, and can detect ultralow concentrations of the cancer biomarker prostate-specific antigen in whole serum, is demonstrated.

Letter p604; News & Views p570

IMAGE CREDIT: MIGUEL SPUCH CALVAR

COVER DESIGN: DAVID SHAND

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