Rolling up nanowires

Germanium monosulfide, GeS, is emerging as one of the most important IV-VI semiconductor materials with potential in opto-electronics applications for telecommunications and computing, and as an absorber of light for use in solar energy conversion. Researchers in China have now demonstrated a convenient method for the selective preparation of germanium sulfide nanostructures, including nanosheets and nanowires. These entities are more active than their bulk counterparts and could open the way to lower cost and safer optoelectronics, solar energy conversion and faster computer circuitry.