Scanning tunneling microscope (STM) images

http://www.princeton.edu/~kahnlab/STMImages.html

Si
(111) surface of silicon
 
HOPG
highly-oriented
pyrolytic graphite surface
 
Au
(111) surface of gold
 
Decanethiol
ordered monolayer of decanethiols
(standing-up phase on (111) surface of gold)
 
CuPc
ordered monolayer of copper phtalocyanine
grown on (111) surface of gold
 

STM Image Gallery (IBM)

Scanning tunneling microscopy image gallery of many metals and surfaces on an atomic scale.

Physical Measurement Laboratory http://www.nist.gov/pml/general/stm/index.cfm