Controlling the electronic and physical coupling on dielectric thin films

Decoupling (probability)
DOI: 10.3762/bjnano.11.132 Publication Date: 2020-10-01T13:24:44Z
ABSTRACT
Ultrathin dielectric/insulating films on metals are often used as decoupling layers to allow for the study of electronic properties adsorbed molecules without interference from underlying metal substrate. However, presence such may effectively change electron donating substrate, example, by lowering its work function and thus enhancing charging molecular adsorbate layer through tunneling. Here, an experimental para -sexiphenyl (6P) ultrathin MgO(100) supported Ag(100) is reported. By deliberately changing MgO(100)/Ag(100) system, it shown that charge transfer (electronic coupling) into 6P can be controlled, monolayers with uncharged (Schottky–Mott regime) charged (Fermi level pinning obtained. Furthermore, was found temperature strongly influence orientation, conformation, wetting behavior (physical thin films.
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