Simultaneous patterning of two different types of nanoparticles into alternating domains of a striped array of a polymer blend in a single spin-casting step

- Simultaneously pattern different NP types addressed with different polymer brushes.
- Spin-cast onto microcontact printed surfaces with alternating surface energy stripes.
- Surface-directed phase separation produces alternating CdS/Ag NP stripes.
- Addition of homopolymer increases free volume and prevents NP gelation.