Figure 6.
1D power spectral density (PSD) graph of the region of interest in Fig. 4 ▸ (2nd row). The periodic structure of the sample gives rise to frequencies around 0.004 nm−1.
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.