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Can glycine form homochiral structural domains on low-index copper surfaces?

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Polcik,  Martin
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Kittel,  Martin
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Hoeft,  Jon T.
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Toomes, R. L., Kang, J.-H., Woodruff, D. P., Polcik, M., Kittel, M., & Hoeft, J. T. (2003). Can glycine form homochiral structural domains on low-index copper surfaces? Surface Science, 522(1-3), L9-L14. doi:10.1016/S0039-6028(02)02355-5.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-116C-0
Abstract
Suggestions that homochiral ordered phases of glycinate, NH2CH2COO–, may exist on Cu(1 1 0) and Cu(1 0 0) have been evaluated in the light of experimental evidence from scanning tunnelling microscopy (STM), qualitative low energy electron diffraction and scanned-energy mode photoelectron diffraction. There is clear evidence for heterochiral Cu(1 1 0)(3¥2)pg and Cu(1 0 0)(4¥2)pg phases. All proposed models for a homochiral (3¥2) phase on Cu(1 1 0) are inconsistent with the results of at least one of the experimental studies. A coexistent c(4¥2) homochiral phase on Cu(1 0 0) cannot be excluded on a similar basis. However, the only evidence for such homochiral phases, obtained from STM, may be attributed to an experimental artefact associated with an asymmetric tunnelling tip.