Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Substrates with surface GRs. (a) Schematic representation of the fabrication process: the silicon moulds are fabricated by electron beam lithography (EBL) and reactive-ion etching (RIE); thermal nanoimprint lithography is exploited to transfer the pattern from the moulds to thermoplastic materials as the copolymer 2-norbornene ethylene (COC). (b,c) Scanning electron microscopy images of COC GRs: T2 (b) and T4 (c); scale bars, 1 μm. (Online version in colour.)
