Nanoscale structural and electronic properties of ultrathin blends of two polyaromatic molecules: a Kelvin probe force microscopy investigation

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
Vincenzo PalermoPaolo Samorì

Abstract

We describe a Kelvin Probe Force Microscopy (KPFM) study on the morphological and electronic properties of complex mono and bi-molecular ultrathin films self-assembled on mica. These architectures are made up from an electron-donor (D), a synthetic all-benzenoid polycyclic aromatic hydrocarbon, and an electron-acceptor (A), perylene-bis-dicarboximide. The former molecule self-assembles into fibers in single component films, while the latter molecule forms discontinuous layers. Taking advantage of the different solubility and self-organizing properties of the A and D molecules, multicomponent ultrathin films characterized by nanoscale phase segregated fibers of D embedded in a discontinuous layer of A are formed. The direct estimation of the surface potential, and consequently the local workfunction from KPFM images allow a comparison of the local electronic properties of the blend with those of the monocomponent films. A change in the average workfunction values of the A and D nanostructures in the blend occurs which is primarily caused by the intimate contact between the two components and the molecular order within the nanostructure self-assembled at the surface. Additional roles can be ascribed to the molecular packing densi...Continue Reading

References

Dec 26, 2001·Chemical Reviews·H TakanoM D Porter
Aug 9, 2002·Journal of the American Chemical Society·Paolo SamoríJürgen P Rabe
Nov 25, 2003·Nature·Eran RabaniLouis E Brus
Apr 9, 2004·Journal of the American Chemical Society·Michael G DebijeKlaus Müllen
Jul 21, 2004·Chemical Communications : Chem Comm·Frank Würthner
Aug 3, 2004·Nature Materials·M Van Der Auweraer, F C De Schryver
Aug 12, 2004·Journal of the American Chemical Society·Jeroen van HerrikhuyzenE W Meijer
Mar 24, 2005·Journal of the American Chemical Society·Marcel KastlerKlaus Müllen
Jul 28, 2005·Journal of the American Chemical Society·Kaushik BalakrishnanLing Zang
Oct 12, 2005·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Vincenzo PalermoPaolo Samorì

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