Mixed Organic Ligand Shells: Controlling the Nanoparticle Surface Morphology toward Tuning the Optoelectronic Properties

Henkel C, Wittmann J, Träg J, Will J, Stiegler L, Strohriegl P, Hirsch A, Unruh T, Zahn D, Halik M, Guldi DM (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Small Wiley-VCH Verlag

Book Volume: 16

Pages Range: 1903729

Journal Issue: 2

DOI: 10.1002/smll.201903729

Abstract

Precise control over the ratio of perylene bisimide (PBI) monomers and aggregates, immobilized on alumina nanoparticle (NP) surfaces, is demonstrated. Towards this goal, phosphonic acid functionalized PBI derivatives (PA-PBI) are shown to self-assemble into stoichiometrically mixed monolayers featuring aliphatic, glycolic, or fluorinated phosphonic acid ligands, serving as imbedding matrix (PA-M) to afford core-shell NPs. Different but, nevertheless, defined PBI monomer/aggregate composition is achieved by either the variation in the PA-PBI to PA-M ratios, or the utilization of different PA-Ms. Various steady-state as well as time-resolved spectroscopy techniques are applied to probe the core-shell NPs with respect to changes in their optical properties upon variations in the shell composition. To this end, the ratio between monomer and excimer-like emission assists in deriving information on the self-assembled monolayer composition, local ordering, and corresponding aggregate content. With the help of X-ray reflectivity measurements, accompanied by molecular dynamics simulations, the built-up of the particle shells, in general, and the PBI aggregation behavior, in particular, are explored in depth.

Authors with CRIS profile

Christian Henkel Lehrstuhl für Physikalische Chemie I Judith Wittmann Professur für Werkstoffwissenschaften (Polymerwerkstoffe) Johannes Träg Lehrstuhl für Theoretische Chemie Johannes Will Lehrstuhl für Kristallographie und Strukturphysik (ICSP) Lisa Stiegler Lehrstuhl für Organische Chemie II Andreas Hirsch Lehrstuhl für Organische Chemie II Tobias Unruh Professur für Nanomaterialcharakterisierung (Streumethoden) Dirk Zahn Professur für Theoretische Chemie Marcus Halik Professur für Werkstoffwissenschaften (Polymerwerkstoffe) Dirk Michael Guldi Lehrstuhl für Physikalische Chemie I

Additional Organisation(s)

Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Related research project(s)

In-situ Characterization of Nanomaterials with Electrons, X-rays/Neutrons and Scanning Probes (GRK 1896) Oct. 1, 2013 - Sept. 30, 2022 SFB 953: Synthetic Carbon Allotropes (SFB 953) Jan. 1, 2012 - Jan. 1, 2015

Involved external institutions

Universität Bayreuth DE Germany (DE)

How to cite

APA:

Henkel, C., Wittmann, J., Träg, J., Will, J., Stiegler, L., Strohriegl, P.,... Guldi, D.M. (2020). Mixed Organic Ligand Shells: Controlling the Nanoparticle Surface Morphology toward Tuning the Optoelectronic Properties. Small, 16(2), 1903729. https://doi.org/10.1002/smll.201903729

MLA:

Henkel, Christian, et al. "Mixed Organic Ligand Shells: Controlling the Nanoparticle Surface Morphology toward Tuning the Optoelectronic Properties." Small 16.2 (2020): 1903729.

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