Orientational order of molecular assemblies on inorganic crystals

D. A. Saville, J. Chun, J. L. Li, H. C. Schniepp, Roberto Car, Ilhan A. Aksay

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Abstract

Surfactant micelles form oriented arrays on crystalline substrates although registration is unexpected since the template unit cell is small compared to the size of a rodlike micelle. Interaction energy calculations based on molecular simulations reveal that orientational energy differences on a molecular scale are too small to explain matters. With atomic force microscopy, we show that orientational ordering is a dynamic, multimolecule process. Treating the cooperative processes as a balance between van derâ Waals torque on a large, rodlike micellar assembly and Brownian motion shows that orientation is favored.

Original languageEnglish (US)
Article number018301
JournalPhysical review letters
Volume96
Issue number1
DOIs
StatePublished - Jan 13 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Saville, D. A., Chun, J., Li, J. L., Schniepp, H. C., Car, R., & Aksay, I. A. (2006). Orientational order of molecular assemblies on inorganic crystals. Physical review letters, 96(1), [018301]. https://doi.org/10.1103/PhysRevLett.96.018301