Near-Field Optical Studies of Thin-Film Mesostructured Organic Materials

Bout, David A. Vanden; Kerimo, Josef; Higgins, and Daniel A.; Barbara, Paul F.

doi:10.1021/ar960274k

Cited by 85 publications

(73 citation statements)

References 47 publications

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“…NSOM [36,37] was used to probe the aggregates in order to see if they can be directly excited at the 437 nm absorption peak. A film cast from a filtered aggregated solution was imaged with an excitation wavelength of 440 nm.…”

Section: Resultsmentioning

confidence: 99%

The effect of solvent quality on the chain morphology in solutions of poly(9,9′-dioctylfluorene)

Kitts

Bout

2007

Polymer

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Section: Resultsmentioning

confidence: 99%

The effect of solvent quality on the chain morphology in solutions of poly(9,9′-dioctylfluorene)

Kitts

Bout

2007

Polymer

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“…[12] Fluorescence microscopy, in addition to AFM, has also proven to be informative for understanding the morphology of the thin film and how intermolecular packing arrangements affect optical properties. [13,14] Understanding, and ultimately controlling, thin film morphology and topology at a molecular level should lead to a widespread implementation of organic materials in optoelectronic technologies.…”

Section: Introductionmentioning

confidence: 99%

A Tetrahedral Oligo(phenylenevinylene) Molecule of Intermediate Dimensions: Effect of Molecular Shape on the Morphology and Electroluminescence of Organic Glasses

et al. 2001

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Tetrakis[(4‐(4′‐(2″,5″‐dioctyloxy‐4″‐(4‴‐(2′‴,5′‴‐dioctyloxy‐4′‴‐styryl)styryl)styryl)styryl)styryl)phenyl]methane (T‐6R‐OC8H17) is an organic chromophore that consists of four optoelectronic fragments (“arms”) connected to a tetrahedral point of convergence (carbon). Bulk samples are amorphous as determined by powder diffraction, while differential scanning calorimetry (DSC) is sometimes ambiguous. Film forming properties were studied by atomic force microscopy (AFM) and fluorescence microscopy as a function of casting solvent and heat treatment. The film forming qualities are useful for the fabrication of light‐emitting diodes with low turn‐on voltages. Device performance is also history dependent. The relationship between bulk morphology, film topology, photoluminescence (PL) properties, and light‐emitting diode (LED) performance is discussed. A comparison of these compounds against the parent oligo(phenylenevinylene) arms, with respect to morphology, topology, and PL properties is also presented.

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“…From the results, because we found that the wavelength of the excitation light (~780 nm) was close to the LSP resonance peak wavelength, we could expect the efficient excitation of LSPs at the tip apex. For the preparation of the PIC-attached Au-coated tip, PIC dye molecules, which have been well known as dye molecules with a large two-photon absorption cross section at the excitation wavelength ~780 nm [32][33][34], could be attached on the surface of the Au-coated tip using a self-assembly technique [35]. In this method, firstly the Au-coated tip was slowly immersed into 1 mM ethanol solution of 3-mercaptopropionic acid (MPA) at room temperature for approximately 20 min, followed by rinsing it with ethanol solution to remove excess thiol MPA molecules.…”

Section: Methodsmentioning

confidence: 99%

Two-photon excited fluorescence from a pseudoisocyanine-attached gold-coated tip via a thin tapered fiber under a weak continuous wave excitation

Ren¹,

Takashima²,

Tanaka³

et al. 2013

Opt. Express

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A simple tapered fiber based photonic-plasmonic hybrid nanostructure composed of a thin tapered fiber and a pseudoisocyanine (PIC)-attached Au-coated tip was demonstrated. Using this simple hybrid nanostructure, we succeeded in observing two-photon excited fluorescence from the PIC dye molecules under a weak continuous wave excitation condition. From the results of the tip-fiber distance dependence and excitation polarization dependence, we found that using a thin tapered fiber and an Au-coated tip realized efficient coupling of the incident light (~95%) and LSP excitation at the Au-coated tip, suggesting the possibility of efficiently inducing two-photon excited fluorescence from the PIC dye molecules attached on the Au-coated tip. This simple photonic-plasmonic hybrid system is one of the promising tools for single photon sources, highly efficient plasmonic sensors, and integrated nonlinear plasmonic devices. 5263-5276 (1997). 36. A. Hartung, S. Brueckner, and H. Bartelt, "Limits of light guidance in optical nanofibers," Opt. Express 18(4), 3754-3761 (2010). 37. M. Fujiwara, K. Toubaru, and S. Takeuchi, "Optical transmittance degradation in tapered fibers," Opt. Express 19(9), 8596-8601 (2011). 38. H. Konishi, H. Fujiwara, S. Takeuchi, and K. Sasaki, "Polarization-discriminated spectra of a fiber-microsphere system," Appl. Phys. Lett. 89(12), 121107 (2006).

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Near-Field Optical Studies of Thin-Film Mesostructured Organic Materials

Cited by 85 publications

References 47 publications

The effect of solvent quality on the chain morphology in solutions of poly(9,9′-dioctylfluorene)

The effect of solvent quality on the chain morphology in solutions of poly(9,9′-dioctylfluorene)

A Tetrahedral Oligo(phenylenevinylene) Molecule of Intermediate Dimensions: Effect of Molecular Shape on the Morphology and Electroluminescence of Organic Glasses

Two-photon excited fluorescence from a pseudoisocyanine-attached gold-coated tip via a thin tapered fiber under a weak continuous wave excitation

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