Orientational Epitaxy of van der Waals Molecular Heterostructures

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Guo L., Wang Y., KAYA D., Palmer R. E., Chen G., Guo Q.

NANO LETTERS, cilt.18, sa.8, ss.5257-5261, 2018 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 18 Sayı: 8
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1021/acs.nanolett.8b02238
  • Dergi Adı: NANO LETTERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.5257-5261
  • Anahtar Kelimeler: van der Waals heterostructures, epitaxy, self-assembly, fullerene, graphene, interface, scanning tunnelling microscopy, GROWTH, C-60, TRANSITIONS, CRYSTALS, POLYMER, FILMS
  • Çukurova Üniversitesi Adresli: Evet

Özet

The shape of individual building blocks is an important parameter in bottom-up self-assembly of nanostructured materials. A simple shape change from sphere to spheroid can significantly affect the assembly process due to the modification to the orientational degrees of freedom. When a layer of spheres is placed upon a layer of spheroids, the strain at the interface can be minimized by the spheroid taking a special orientation. C-70 fullerenes represent the smallest spheroids, and their interaction with a sphere-like C-g0 is investigated. We find that the orientation of the C-70 within a close-packed C-70 layer can be steered by contacting a layer of C-60. This orientational steering phenomenon is potentially useful for epitaxial growth of multilayer van der Waals molecular heterostructures.