Wen, Y. Q.; Song, Y. L.; Jiang, G. Y.; Zhao, D. B.; Ding, K. L.; Yuan, W. F.; Lin, X.; Gao, H. J.; Jiang, L.; Zhu, D. B., Adv. Mater. 2004, 16 (22), 2018-2021.
Crystalline organic films formed by self-assembly of 2,2-dimethyl-alpha,alpha,alpha',alpha'-tetraphenyldioxolane-4,5-dimethanol and coumarin molecules can be used for ultrahigh-density data storage. A 3 x 4 matrix pattern (see Figure) was recorded by applying voltage pulses between a scanning tunneling microscope tip and the film. Regulating the amplitude and width of the applied pulsed voltage allows a data storage density of about 10(13) bits cm(-2) to be achieved.