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Regular nanostructures are formed by chemical reaction of ammonia gas with crystalline substituted benzoic acid such as p-bromobenzoic (1a), p-toluic (1b), p-aminobenzoic (1c), and p-nitrobenzoic acid (1d). Their size and shape are determined and depicted by atomic force microscopy (AFM). AFM reveals that the crystal main face (100) of 1a, (100) of 1b, (100) of 1c, and (001) of 1d exhibits craters and volcanoes, craters and volcanoes, volcanoes, and volcanoes, respectively, whereas the long side face (100) of 1d gives rise to craters and volcanoes. All the experimental results are correlated with the crystal structures. Molecular interpretations of the AFM features of 1a, 1b, 1c, and 1d are given. © 2000 American Vacuum Society.
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures (Volume:18 , Issue: 6 )
Date of Publication: Nov 2000