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Brownian Motion in Optical Tweezers, a Comparison between MD Simulations and Experimental Data in the Ballistic Regime

The four most popular water models in molecular dynamics were studied in large-scale simulations of Brownian motion of colloidal particles in optical tweezers and then compared with experimental measurements in the same time scale. We present the most direct comparison of colloidal polystyrene parti...

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Autores principales: Zembrzycki, Krzysztof, Pawłowska, Sylwia, Pierini, Filippo, Kowalewski, Tomasz Aleksander
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9920121/
https://www.ncbi.nlm.nih.gov/pubmed/36772088
http://dx.doi.org/10.3390/polym15030787
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author Zembrzycki, Krzysztof
Pawłowska, Sylwia
Pierini, Filippo
Kowalewski, Tomasz Aleksander
author_facet Zembrzycki, Krzysztof
Pawłowska, Sylwia
Pierini, Filippo
Kowalewski, Tomasz Aleksander
author_sort Zembrzycki, Krzysztof
collection PubMed
description The four most popular water models in molecular dynamics were studied in large-scale simulations of Brownian motion of colloidal particles in optical tweezers and then compared with experimental measurements in the same time scale. We present the most direct comparison of colloidal polystyrene particle diffusion in molecular dynamics simulations and experimental data on the same time scales in the ballistic regime. The four most popular water models, all of which take into account electrostatic interactions, are tested and compared based on yielded results and resources required. Three different conditions were simulated: a freely moving particle and one in a potential force field with two different strengths based on 1 pN/nm and 10 pN/nm. In all cases, the diameter of the colloidal particle was 50 nm. The acquired data were compared with experimental measurements performed using optical tweezers with position capture rates as high as 125 MHz. The experiments were performed in pure water on polystyrene particles with a 1 μm diameter in special microchannel cells.
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spelling pubmed-99201212023-02-12 Brownian Motion in Optical Tweezers, a Comparison between MD Simulations and Experimental Data in the Ballistic Regime Zembrzycki, Krzysztof Pawłowska, Sylwia Pierini, Filippo Kowalewski, Tomasz Aleksander Polymers (Basel) Article The four most popular water models in molecular dynamics were studied in large-scale simulations of Brownian motion of colloidal particles in optical tweezers and then compared with experimental measurements in the same time scale. We present the most direct comparison of colloidal polystyrene particle diffusion in molecular dynamics simulations and experimental data on the same time scales in the ballistic regime. The four most popular water models, all of which take into account electrostatic interactions, are tested and compared based on yielded results and resources required. Three different conditions were simulated: a freely moving particle and one in a potential force field with two different strengths based on 1 pN/nm and 10 pN/nm. In all cases, the diameter of the colloidal particle was 50 nm. The acquired data were compared with experimental measurements performed using optical tweezers with position capture rates as high as 125 MHz. The experiments were performed in pure water on polystyrene particles with a 1 μm diameter in special microchannel cells. MDPI 2023-02-03 /pmc/articles/PMC9920121/ /pubmed/36772088 http://dx.doi.org/10.3390/polym15030787 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zembrzycki, Krzysztof
Pawłowska, Sylwia
Pierini, Filippo
Kowalewski, Tomasz Aleksander
Brownian Motion in Optical Tweezers, a Comparison between MD Simulations and Experimental Data in the Ballistic Regime
title Brownian Motion in Optical Tweezers, a Comparison between MD Simulations and Experimental Data in the Ballistic Regime
title_full Brownian Motion in Optical Tweezers, a Comparison between MD Simulations and Experimental Data in the Ballistic Regime
title_fullStr Brownian Motion in Optical Tweezers, a Comparison between MD Simulations and Experimental Data in the Ballistic Regime
title_full_unstemmed Brownian Motion in Optical Tweezers, a Comparison between MD Simulations and Experimental Data in the Ballistic Regime
title_short Brownian Motion in Optical Tweezers, a Comparison between MD Simulations and Experimental Data in the Ballistic Regime
title_sort brownian motion in optical tweezers, a comparison between md simulations and experimental data in the ballistic regime
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9920121/
https://www.ncbi.nlm.nih.gov/pubmed/36772088
http://dx.doi.org/10.3390/polym15030787
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