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.
Typical 70° tilted low-magnification SEM micrographs of cells on comb structures with trench widths of (a) 0.18 μm and (b) 0.25 μm. Note that cellular material within the trenches is not visible. A cross-sectioning technique is needed to visualize the underbelly of the cell.
