Multiwavelength emission characterization of nanoparticles by means of a novel analytical ultracentrifuge
Particle properties depend on dispersity (particle size, shape, surface and inner structure) and composition. In order to fully exploit these property functions in technical applications, comprehensive multi-dimensional characterization methods are required. Developments in recent years in the field of analytical ultracentrifugation with integrated multi-wavelength absorption optics have already demonstrated the unmatched resolution, accuracy and reproducibility of size, shape, density and spectral absorption property characterization. Objective of this project is the development of a novel emission detector within an analytical ultracentrifuge. The separation of the particles during sedimentation allows the determination of dispersity-dependent (e.g. size, shape, density) emission properties. The new method is applicable for quantum dots, new 2D materials and proteins and their aggregates.
Recent Publications
2024
- Lautenbach, V., Onishchukov, G., Wawra, S., Frank, U., Hartmann, L., Peukert, W., & Walter, J. (2024). Development of an advanced multiwavelength emission detector for the analytical ultracentrifuge. Nanoscale Advances. https://doi.org/10.1039/d3na00980g
2023
- Baer, A., Wawra, S., Bielmeier, K., Uttinger, M., Smith, D.M., Peukert, W.,... Smith, A.K. (2023). The Stokes–Einstein–Sutherland Equation at the Nanoscale Revisited. Small. https://doi.org/10.1002/smll.202304670
- Frank, U., Dienstbier, J., Tischer, F., Wawra, S., Gromotka, L., Walter, J.,... Peukert, W. (2023). Multidimensional Fractionation of Particles. Separations, 10(4). https://doi.org/10.3390/separations10040252
- 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://doi.org/10.1021/acsnano.2c12257
2021
- Frank, U., Uttinger, M., Wawra, S., Lübbert, C., & Peukert, W. (2021). Progress in Multidimensional Particle Characterization. KONA Powder and Particle Journal. https://doi.org/10.14356/kona.2022005
2020
- Furat, O., Frank, U., Weber, M., Wawra, S., Peukert, W., & Schmidt, V. (2020). Estimation of bivariate probability distributions of nanoparticle characteristics, based on univariate measurements. Inverse Problems in Science and Engineering. https://doi.org/10.1080/17415977.2020.1849181
- Uttinger, M., Boldt, S., Wawra, S., Freiwald, T., Damm, C., Walter, J.,... Peukert, W. (2020). New Prospects for Particle Characterization Using Analytical Centrifugation with Sector-Shaped Centerpieces. Particle & Particle Systems Characterization. https://doi.org/10.1002/ppsc.202000108
- Uttinger, M., Heyn, T.R., Jandt, U., Wawra, S., Winzer, B., Keppler, J.K., & Peukert, W. (2020). Measurement of length distribution of beta-lactoglobulin fibrils by multiwavelength analytical ultracentrifugation. European Biophysics Journal. https://doi.org/10.1007/s00249-020-01421-4
2019
- Frank, U., Wawra, S., Pflug, L., & Peukert, W. (2019). Multidimensional Particle Size Distributions and Their Application to Nonspherical Particle Systems in Two Dimensions. Particle & Particle Systems Characterization. https://doi.org/10.1002/ppsc.201800554
- Uttinger, M., Wawra, S., Guckeisen, T., Walter, J., Baer, A., Thajudeen, T.,... Peukert, W. (2019). A Comprehensive Brownian Dynamics Approach for the Determination of Non-ideality Parameters from Analytical Ultracentrifugation. Langmuir, 35(35), 11491 - 11502. https://doi.org/10.1021/acs.langmuir.9b01916
- Wawra, S., Onishchukov, G., Maranska, M., Eigler, S., Walter, J., & Peukert, W. (2019). A multiwavelength emission detector for analytical ultracentrifugation. Nanoscale Advances. https://doi.org/10.1039/C9NA00487D
2018
- Wawra, S., Pflug, L., Thajudeen, T., Kryschi, C., Stingl, M., & Peukert, W. (2018). Determination of the two-dimensional distributions of gold nanorods by multiwavelength analytical ultracentrifugation. Nature Communications, 9(1). https://doi.org/10.1038/s41467-018-07366-9
- Wawra, S., Thoma, M., Walter, J., Lübbert, C., Thajudeen, T., Damm, C., & Peukert, W. (2018). Ionomer and protein size analysis by analytical ultracentrifugation and electrospray scanning mobility particle sizer. European Biophysics Journal, 47(7), 777-787. https://doi.org/10.1007/s00249-018-1314-2
2017
- Nacken, T., Halbig, C.E., Wawra, S., Damm, C., Romeis, S., Walter, J.,... Peukert, W. (2017). Structural factors controlling size reduction of graphene oxide in liquid processing. Carbon, 125, 360-369. https://doi.org/10.1016/j.carbon.2017.09.066
- Uttinger, M., Walter, J., Thajudeen, T., Wawra, S., & Peukert, W. (2017). Brownian dynamics simulations of analytical ultracentrifugation experiments exhibiting hydrodynamic and thermodynamic non-ideality. Nanoscale, 9(45), 17770-17780. https://doi.org/10.1039/c7nr06583c