Publications

Abstract The synthesis and characterization of small monodisperse multimodal iron oxide nanoparticles (IONPs), functionalized with boron-dipyrromethene (BODIPY) derivatives is described. Optical and relaxometric properties of the nanoparticles have been evaluated, suggesting a potential applicability of the particles as bimodal contrast agent for magnetic resonance and optical imaging. The BODIPY funcionalized IONPs showed bright fluorescence ...

A simple and cost-effective method based on multi-photon microscopy is presented for the preliminary screening of the general morphology, size range and heterogeneity of Ir(III) nano-aggregate formulations.

In this study, a new chiral α,ω-bifunctional polythiophene is synthesized and used as a nanoparticle linker molecule to synthesize the first layered conjugated polymer/nanoparticle (CP/NP) hybrid m...

The supramolecular organization of star-shaped polythiophenes was investigated in a solvent/nonsolvent system and upon cooling. Both systems yield entirely different supramolecular aggregates. Classical characterization techniques can give some insight; the exact mechanism is currently not understood. By introducing second- and third-harmonic light scattering and its combination with other optical techniques, we were able to fully investigate ...

Poly(thiophene)s have an inherently large third-order nonlinear optical (TONO) response, but applications are not straightforward due to unoptimized materials. Therefore, several structure-property relationships (molar mass, branching, regioregularity) are investigated to unravel which structural modifications give the highest TONO response. Poly(3-hexylthiophene) with different molar masses, poly[3-(2-ethylhexyl)thiophene] with different molar ...

The preparation of gold nanoparticles through reduction of chloroauric acid by trisodium citrate, also known as the Turkevich synthesis, was analyzed both ex situ and in situ. In situ experiments consist of dynamically tracking second and third harmonic light scattering and multiphoton luminescence. By complementing in situ data with ex situ quenching experiments, which enabled further UV–vis–NIR spectroscopy, as well as transmission electron ...

Due to their capability of film formation and remarkable optical features, semiconductor polymers with high two-photon absorption (2PA) have been studied as potential candidates for the development of organic photonic platforms. Furthermore, there is a high demand for photonic devices operating in the near-infrared (IR) region. However, the magnitude of the nonlinear optical response of random coil polymers in the IR region is weak due to the ...