Determination of 2D Particle Size Distributions in Plasmonic Nanoparticle Colloids via Analytical Ultracentrifugation: Application to Gold Bipyramids.

Frank U, Drobek D, Sánchez-Iglesias A, Wawra S, Nees N, Walter J, Pflug L, Apeleo Zubiri B, Spiecker E, Liz-Marzan LM, Peukert W (2023)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2023

Journal

ACS nano American Chemical Society

DOI: 10.1021/acsnano.2c12257

Abstract

Multidimensional particle properties determine the product properties in numerous advanced applications. Accurate and statistically meaningful measurements of complex particles and their multidimensional distributions are highly challenging but strongly needed. 2D particle size distributions of plasmonic nanoparticles of complex regular shape can be obtained from analytical ultracentrifugation experiments via the optical back coupling method. A workflow for the calculation of frictional properties of arbitrarily shaped nanoparticles was developed based on bead shell models and applied to gold bipyramids with a pentagonal cross-section. The obtained 2D particle length-diameter distributions and the reduced cumulative 1D length and diameter distributions were compared to transmission electron microscopy measurements. While we find very good agreement for most measurements, the obtained length and diameter distributions were shifted by a few nanometers for some samples. Transmission electron microscopy, energy-dispersive X-ray spectroscopy, electron tomography, and finite element modeling indicate that the shift originated from a slight mismatch between the assumed shape of the simulated perfect bipyramids and the real particle shape and composition due to the presence of silver in the particles. This study demonstrates the feasibility of the applied techniques for complex shape analysis of nanoparticle ensembles with unmatched particle count numbers.

Authors with CRIS profile

Uwe Frank Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Dominik Drobek Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Simon Wawra Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Nico Nees Lehrstuhl für Angewandte Mathematik (Kontinuierliche Optimierung) Johannes Walter Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Lukas Pflug FAU Competence Center Scientific Computing (FAU CSC) Benjamin Apeleo Zubiri Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Wolfgang Peukert Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik

Additional Organisation(s)

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

Involved external institutions

Basque Research & Technology Alliance BRTA ES Spain (ES)

How to cite

APA:

Frank, U., Drobek, D., Sánchez-Iglesias, A., Wawra, S., Nees, N., Walter, J.,... Peukert, W. (2023). Determination of 2D Particle Size Distributions in Plasmonic Nanoparticle Colloids via Analytical Ultracentrifugation: Application to Gold Bipyramids. ACS nano. https://dx.doi.org/10.1021/acsnano.2c12257

MLA:

Frank, Uwe, et al. "Determination of 2D Particle Size Distributions in Plasmonic Nanoparticle Colloids via Analytical Ultracentrifugation: Application to Gold Bipyramids." ACS nano (2023).

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