Universal Model for Deposition of Entities from Molecular to Nanosizes on Nanofibers

TL;DR

This paper introduces a comprehensive model for the deposition of entities from molecular to nanoscale sizes on nanofibers, considering transport mechanisms and adhesion probabilities, validated against experimental data.

Contribution

A unified model for entity deposition on nanofibers across a wide size range, incorporating convective diffusion, interfacial interactions, and adhesion kinetics, validated with experimental data.

Findings

Model accurately predicts deposition behavior across sizes.

Adhesion probability decreases with smaller entity sizes.

Dimensionless surface coverage enhances understanding of adhesion kinetics.

Abstract

Understanding the behavior of entities is critical to the development of new policies and technologies aiming at global health and wellbeing; this paper presents a unified model developed and validated for the deposition of entities, ranging from a few Angstroms to tens of nanometers,on nanofibers. The transport of entities is based on convective diffusion and interfacial interactive diffusion. As the size of entities decreases to intermediate sizes - between gas molecules and nanoparticles - adhesion probability on the surface is less than unity, which is determined by the interfacial interactions and kinetics of adhesion. Dimensionless surface coverage provides a better understanding of adhesion kinetic by considering the effects of initial concentration and time. The model is validated by available experimental data in the literature.