| Scanning tunneling microscopy (STM) is used to perform ultrahigh-density data storage on single organic thin films 3-phenyl-1-ureidonitrile (PUN) and p-nitrobenzonitrile (PNBN), respectively. And STM is also used to observe the structure and morphology of polyacrylonitrile (PAN)-based carbon fibers, cellulose and superconductive YBa2Cu3O7-δ thin films in nanometer scale, separately.Nanofabrication and nanometer-scale data recording have stimulated much interest in the last two decades. Scanning probe microscopes (SPM), including scanning tunneling microscope (STM), atomic force microscope (AFM), and scanning near-field optical microscope (SNOM), have proven powerful for conducting data storage at nanometer scale or molecular scale. STM has been used increasingly to make surface modification on the nanometer scale for developing electronic devices for high-density data storage.Because of a few advantages of organic materials, such as, lower cost, easy synthesis, controllable properties, people have tried to employ organic molecules as recorded media to carry out the data storage with SPM. The smaller data recorded marks can be acquired from organic complex thin films, because the record does not need a relatively large region for phase transition from an amorphous state to a crystalline state. Horever, in data storage recording, the region of the films used for storage must be very smooth and have a certain character. On the other hand, the films should have a large enough single-crystal region for larger-area record in application. It is very difficult to get a large enough single-crystal region in organic complex thin films. So we have paid attention to single organic materials. It may be more valid to get a large enough smooth single-crystal region for data storage in organic single thin films. This paper aimes to apply single organic thin films 3-phenyl-1-ureidonitrile (PUN) and p-nitrobenzonitrile (PNBN) to perform ultrahigh-density data storage by...
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