Structural characterization of alpha,omega-DH6T monolayer films grown at the liquid-liquid interface

Johnson M, Hawly T, Wu M, Spiecker E, Fink R (2021)


Publication Type: Journal article

Publication year: 2021

Journal

DOI: 10.1039/d1sm01072g

Abstract

The molecular self-organization of alpha,omega-dihexylsexithiophene (alpha,omega-DH6T) monolayers prepared at the solvent-water interface is investigated by complementary microscopy techniques. Our study focuses on the influence of solvents and initial droplet volume on the resulting film morphology. Long-range extended domains in the monolayer regime are detected by visible light microscopy only for toluene. Small-area electron diffraction (SAED) proves the formation of single-crystalline monolayers with structural parameters identical to the organic bulk crystals. In comparison with conventional vacuum sublimated thin films a deviant molecular orientation, derived from near-edge-X-ray absorption fine structure (NEXAFS) in combination with a lower step height measured by atomic-force-microscopy (AFM), indicates a different behaviour of the flexible terminal hexyl chains during growth in a liquid surrounding. Furthermore, a structural degradation over time is observed which is caused by residual solvent molecules that are incorporated during the transfer procedure.

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APA:

Johnson, M., Hawly, T., Wu, M., Spiecker, E., & Fink, R. (2021). Structural characterization of alpha,omega-DH6T monolayer films grown at the liquid-liquid interface. Soft Matter. https://dx.doi.org/10.1039/d1sm01072g

MLA:

Johnson, Manuel, et al. "Structural characterization of alpha,omega-DH6T monolayer films grown at the liquid-liquid interface." Soft Matter (2021).

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