Crystalline Thin Film of a Donor- Substituted Cyanoethynylethene for Nanoscale Data Recording Through Intermolecular Charge-Transfer Interactions


  • This work is supported by the NSFC (Grant Nos. 50173028, 90201036 and 20421101), 863 Project (Grant Nos. 2002AA302101, 2004AA302G10), and the ETH Research Council.


original image

Nanoscale data recording on high- quality crystalline thin films of N,N- dimethylanilino donor-substituted tricyanoethynylethene acceptors has been achieved by scanning tunneling microscopy with a storage density of about 1013 bits cm–2 (see Figure). The recording is based on an electric-field-induced intermolecular charge-transfer mechanism, which is strongly influenced by the ordered, antiparallel packing mode of the dipolar donor–acceptor molecules in the film.