Figure 1From: Reusable three-dimensional nanostructured substrates for surface-enhanced Raman scatteringSEM images of PS nanospheres on quartz substrate. (a) Top morphology after self-assembly, and after O2 plasma tailoring with a typical gas pressure of 2 Pa, and O2 gas flow of 40 sccm, a radio-frequency (RF) power of 40 W, with the treatment time as (b) 3, (c) 5, and (d) 10 s, respectively.Back to article page