Visualizing bond-length differences in a single molecule (hexabenzocoronene) using atomic force microscopy
Image from:
http://www.bbc.co.uk/news/science-environment-19584301

Source article:
Gross et al. 2012. “Bond-Order Discrimination by Atomic Force Microscopy.” Science. Vol. 337 no. 6100 pp. 1326-1329. DOI: 10.1126/science.1225621
http://www.sciencemag.org/content/337/6100/1326.full