Further reading:
Y.-K. Tzeng, O. Faklaris, B.-M. Chang, Y. Kuo, J.-H. Hsu, and H.-C. Chang, "Superresolution imaging of albumin-conjugated fluorescent nanodiamonds in cells by stimulated emission depletion," Angew. Chem. Int. Ed. 50, 2262-2265 (2011).