A new polymer membrane that efficiently separates carbon dioxide from methane could greatly ease the processing of natural gas. (p. 269)

Clusters of paclitaxel molecules attached to gold nanoparticles could deliver a safer and more effective chemotherapy punch to tumors. (p. 180)

A new high-resolution printing technique could make flexible electronics such as plastic displays and solar cells easier to produce. (p. 166)

Ultrathin sheets made from cellulose and carbon nanotubes could serve as flexible, versatile batteries. (p. 100)

A chemical in urine reveals a person's exposure to diesel exhaust. (p. 69)

Scientists have grown mouse stem cells on a bed of silicon nano-needles, hoping that they will be able to guide the cells' development through electrical stimulation. (p. 388)

A model crystal made of water-saturated polymer spheres shows that small defects in a crystal can cause it to melt from the inside out. (p. 4)

A new biosensor that can detect the mass of a single DNA molecule could lead to faster and more accurate screening for HIV infection, cancer, and other diseases. (p. 13)

The study of neurological diseases and brain functions could get a lot more precise with the invention of an optical sensor that can closely monitor a key chemical in the brain. (p. 357)