کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
595628 1454018 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chirality transfer by epitaxial mismatch in multi-layered homochiral molecular films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Chirality transfer by epitaxial mismatch in multi-layered homochiral molecular films
چکیده انگلیسی
We report the transfer of chirality from enantiomorphous monolayer into thin films. The pure enantiomers of heptahelicene, a helically shaped aromatic molecule, form ordered first layer structures that exhibit enantiomorphism by having opposite tilt angles of the adsorbate lattice with respect to the Cu(1 1 1) lattice of the metal template. The next layers grow on top quasi-epitaxially, but with a small lattice mismatch. This leads to Moiré structures observed via scanning tunneling microscopy. The mismatch differs along the two adsorbate lattice vectors, thus causing a transfer of the oblique tilt angle in the first layer into an apparent tilt angle of the Moiré pattern. The mechanism of this chirality transfer in terms of a detailed structure model is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 354, Issues 1–3, 5 February 2010, Pages 240-245
نویسندگان
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