Growth of pentacene molecules on Tsai-type quasicrystals and related crystal surfaces



Sharma, HR ORCID: 0000-0003-0456-6258, Coates, S ORCID: 0000-0002-8408-1703, Alofi, A and McGrath, R ORCID: 0000-0002-9880-5741
(2022) Growth of pentacene molecules on Tsai-type quasicrystals and related crystal surfaces. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 40 (1). 013211-.

[img] Text
Pn_AgInYb_approximant.pdf - Author Accepted Manuscript

Download (4MB) | Preview

Abstract

<jats:p>We present a study of the adsorption of pentacene (Pn) molecules on the high symmetry (fivefold, threefold, and twofold) surfaces of the icosahedral (i) Ag–In–Yb quasicrystal. We also compare the results with adsorption of Pn on a surface of a periodic crystal related to this quasicrystal, the (111) surface of the Au–Al–Tb 1/1 approximant. Scanning tunneling microscopy reveals that Pn molecules on the quasicrystal surfaces are aligned along the high symmetry directions of the substrates and selectively adsorb on Yb atoms and thus exhibit quasicrystalline order. Pn molecules on the Au–Al–Tb approximant surface also preferably adopt Tb sites. The behavior of selective adsorption can be understood in terms of the geometry and electronic properties of the adsorbate and substrate. The Yb–Yb (Tb–Tb) separations are comparable to the C–C or H–H distances in a Pn molecule. Pn is an electron donor, whereas the unoccupied electronic states of the substrate are dominated by the rare earth atoms, suggesting that there is an electronic transfer between the Pn molecules and Yb (Tb) atoms.</jats:p>

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 03 Dec 2021 08:19
Last Modified: 15 Mar 2024 02:45
DOI: 10.1116/6.0001412
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3144440