Optofluidic assembly of red/blue/green semiconductor nanowires

A full-color pixel consisting of CdSe, ZnO, and CdS nanowires has been heterogeneously integrated on a substrate with lithographic accuracy using lateral optoelectronic tweezers (LOET). Red (CdSe, 685 nm), blue (CdS, 496 nm), and green (ZnO, 518 nm) light emissions are obtained by selectively pumping the corresponding nanowires. Potentially the nanowires can be directly assembled on CMOS driver circuit for a low-power display.