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Advanced Materials

Reversible Nanometer-Scale Data Storage on a Self-Assembled, Organic, Crystalline Thin Film


  • This work is supported by NSFC (Grant Nos. 50173028, 20574084, 90201036) and 863 Project (Grant No. 2002 AA302101, 2004AA302013). Supporting Information is available online from Wiley InterScience or from the author.


An organic donor–acceptor molecule, 4′-cyano-2,6-dimethyl-4-hydroxy azobenzene (CDHAB), has been designed and synthesized for data storage. Reversible nanometer-scale data storage is realized on its highly ordered self-assembled thin film by applying voltage pulses between a scanning tunneling microscope tip and the substrate. The changes in the conductance of the CDHAB film result in the formation of the information dots (see figure).

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