Cargando…

Simulating stochastic adsorption of diluted solute molecules at interfaces

This report uses Monte Carlo simulations to connect stochastic single-molecule and ensemble surface adsorption of molecules from dilute solutions. Monte Carlo simulations often use a fundamental time resolution to simulate each discrete step for each molecule. The adsorption rate obtained from such...

Descripción completa

Detalles Bibliográficos
Autor principal: Chen, Jixin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: AIP Publishing LLC 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8758205/
https://www.ncbi.nlm.nih.gov/pubmed/35070490
http://dx.doi.org/10.1063/5.0064140
_version_ 1784632846449639424
author Chen, Jixin
author_facet Chen, Jixin
author_sort Chen, Jixin
collection PubMed
description This report uses Monte Carlo simulations to connect stochastic single-molecule and ensemble surface adsorption of molecules from dilute solutions. Monte Carlo simulations often use a fundamental time resolution to simulate each discrete step for each molecule. The adsorption rate obtained from such a simulation surprisingly contains an error compared to the results obtained from the traditional method. Simulating adsorption kinetics is interesting in many processes, such as mass transportation within cells, the kinetics of drug–receptor interactions, membrane filtration, and other general reaction kinetics in diluted solutions. Thus, it is important to understand the origin of the disagreement and find a way to correct the results. This report reviews the traditional model, explains the single-molecule simulations, and introduces a method to correct the results of adsorption rate. For example, one can bin finer time steps into time steps of interest to simulate the fractal diffusion or simply introduce a correction factor for the simulations. Then two model systems, self-assembled monolayer (SAM) and biosensing on the patterned surface, are simulated to check the accuracy of the equations. It is found that the adsorption rate of SAM is highly dependent on the conditions and the uncertainty is large. However, the biosensing system is relatively accurate. This is because the concentration gradient near the interface varies significantly with reaction conditions for SAMs while relatively stable for the biosensing system.
format Online
Article
Text
id pubmed-8758205
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher AIP Publishing LLC
record_format MEDLINE/PubMed
spelling pubmed-87582052022-01-21 Simulating stochastic adsorption of diluted solute molecules at interfaces Chen, Jixin AIP Adv Regular Articles This report uses Monte Carlo simulations to connect stochastic single-molecule and ensemble surface adsorption of molecules from dilute solutions. Monte Carlo simulations often use a fundamental time resolution to simulate each discrete step for each molecule. The adsorption rate obtained from such a simulation surprisingly contains an error compared to the results obtained from the traditional method. Simulating adsorption kinetics is interesting in many processes, such as mass transportation within cells, the kinetics of drug–receptor interactions, membrane filtration, and other general reaction kinetics in diluted solutions. Thus, it is important to understand the origin of the disagreement and find a way to correct the results. This report reviews the traditional model, explains the single-molecule simulations, and introduces a method to correct the results of adsorption rate. For example, one can bin finer time steps into time steps of interest to simulate the fractal diffusion or simply introduce a correction factor for the simulations. Then two model systems, self-assembled monolayer (SAM) and biosensing on the patterned surface, are simulated to check the accuracy of the equations. It is found that the adsorption rate of SAM is highly dependent on the conditions and the uncertainty is large. However, the biosensing system is relatively accurate. This is because the concentration gradient near the interface varies significantly with reaction conditions for SAMs while relatively stable for the biosensing system. AIP Publishing LLC 2022-01-11 /pmc/articles/PMC8758205/ /pubmed/35070490 http://dx.doi.org/10.1063/5.0064140 Text en © 2022 Author(s). https://creativecommons.org/licenses/by/4.0/All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle Regular Articles
Chen, Jixin
Simulating stochastic adsorption of diluted solute molecules at interfaces
title Simulating stochastic adsorption of diluted solute molecules at interfaces
title_full Simulating stochastic adsorption of diluted solute molecules at interfaces
title_fullStr Simulating stochastic adsorption of diluted solute molecules at interfaces
title_full_unstemmed Simulating stochastic adsorption of diluted solute molecules at interfaces
title_short Simulating stochastic adsorption of diluted solute molecules at interfaces
title_sort simulating stochastic adsorption of diluted solute molecules at interfaces
topic Regular Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8758205/
https://www.ncbi.nlm.nih.gov/pubmed/35070490
http://dx.doi.org/10.1063/5.0064140
work_keys_str_mv AT chenjixin simulatingstochasticadsorptionofdilutedsolutemoleculesatinterfaces