Parallelly and Normally Surface-Aligned Organic Nanofiber Arrays

Bordo, Kirill; Schiek, Manuela; Ghazal, Aghiad; Wallmann, Ivonne; Lützen, Arne; Balzer, Frank; Rubahn, Horst‐Günter

doi:10.1021/jp204980n

Cited by 12 publications

(14 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From a discrete Fourier analysis of the angle dependent fluorescence intensity, the angle of maximum fluorescence f pol is determined for each pixel. 41,42 Assuming that the transition dipole between the excited state S 1 and the ground state S 0 of CNP4 is parallel to its long molecule axis, 33,43,44 f pol reflects the averaged orientation of the long molecule axes for this image pixel. This direction is related to the muscovite high symmetry directions [100], [110], and [% 110], which are determined by means of a percussion figure.…”

Section: Methodsmentioning

confidence: 99%

Assembly of diverse molecular aggregates with a single, substrate-directed molecule orientation

et al. 2016

Self Cite

View full text Add to dashboard Cite

Oriented, fluorescing organic nanoaggregates derived from 1,4'''-dicyano-functionalized para-quaterphenylene (CNP4) are obtained upon vacuum deposition on muscovite mica. Two types of aggregates are observed with fiber- and wing-like shape, respectively, both growing along distinct substrate directions. The polarization of the emitted fluorescence, their morphology, and their electric surface potential differ, reflecting different polymorphs. The wings are chiral twins. The molecules orient within ±5° along the same direction, templated by the substrate.

show abstract

Section: Methodsmentioning

confidence: 99%

Assembly of diverse molecular aggregates with a single, substrate-directed molecule orientation

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“… 1 − 18 Whereas the epitaxial growth has been studied on various substrates, in particular anisotropic surfaces seem favorable to conserve the highly anistropic morphology and optical properties, for example, polarized emission or adsorption provided by a parallel molecular orientation obtained by self-assembly. 19 , 20 Consequently, Cu(110), 21 − 23 TiO 2 (110) 24 and muscovite mica(001) 4 , 25 − 27 are frequently chosen as a proper fundament to study the epitaxial growth of rod-like small molecules.…”

Section: Introductionmentioning

confidence: 99%

The Epitaxial Growth of Self-Assembled Ternaphthalene Fibers on Muscovite Mica

Simbrunner

Schwabegger

Resel

et al. 2014

Crystal Growth & Design

View full text Add to dashboard Cite

The morphology and structure of 2,2′:6′,2″-ternaphthalene (NNN) deposited on muscovite mica(001) substrates was investigated by scanning force microscopy (SFM) and specular X-ray diffraction measurements. Consistently, both methods reveal the coexistence of needle-like structures with a {111} contact plane and {001} orientated island-like crystallites, which are built up by almost upright standing NNN molecules. Both orientations are characterized by a well-defined azimuthal alignment relative to the substrate surface, which is analyzed by X-ray diffraction pole figure (XRD-PF) measurements. Based on XRD-PF and SFM analysis, the azimuthal alignment of {001} orientated crystallites is explained by ledge-directed epitaxy along the fibers’ sidewalls. These fibers are found to orient along two dominant directions, which is verified and explained by a doubling of the energetically preferred molecular adsorption site by mirror symmetry of the substrate surface. The experimental findings are confirmed by force-field simulations and are discussed based on a recently reported growth model.

show abstract

“…[19][20][21] The polarization angle and thus the average angle of the long molecular axes for the image pixel at (x, y) is then…”

Section: Methodsmentioning

confidence: 99%

Epitaxial growth of a methoxy-functionalized organic semiconductor on dielectric surfaces

et al. 2014

Self Cite

View full text Add to dashboard Cite

Functionalization of small, rod like organic molecules can be used to optimize organic devices. Here we report on nanofiber formation and thin film growth of a methoxy-functionalized para-quaterphenylene (1,4'''-Dimethoxy-4,1':4',1'':4'',1'''-quaterphenylene, MOP4) on prototypical dielectric substrates such as muscovite mica, phlogopite mica, highly ordered pyrolytic graphite (HOPG), and on the alkali halide NaCl. The nanofibers consist of lying molecules, the films of upright standing ones. The grown samples are characterized by polarized optical microscopy (fluorescence, birefringence, bireflectance), by atomic force microscopy (AFM), and by Kelvin probe force microscopy (KPFM) to gain insight into their structure and epitaxial relation with the substrates.

show abstract

Parallelly and Normally Surface-Aligned Organic Nanofiber Arrays

Cited by 12 publications

References 38 publications

Assembly of diverse molecular aggregates with a single, substrate-directed molecule orientation

Assembly of diverse molecular aggregates with a single, substrate-directed molecule orientation

The Epitaxial Growth of Self-Assembled Ternaphthalene Fibers on Muscovite Mica

Epitaxial growth of a methoxy-functionalized organic semiconductor on dielectric surfaces

Contact Info

Product

Resources

About