Publications by authors named "Naoki Tomioka"
Single-particle tracking of polymer aggregates inside disordered porous media.
Nanoscale Adv
January 2025
The diffusion motions of individual polymer aggregates in disordered porous media were visualized using the single-particle tracking (SPT) method because the motions inside porous media play important roles in various fields of science and engineering. In the aggregates diffused on the surfaces of pores, continuous adsorption and desorption processes were observed. The relationship between the size of the aggregates and pore size was analysed based on diffusion coefficients, moment scaling spectrum (MSS) slope analysis, and diffusion anisotropy analysis.
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- Diatoms have silica-based cell walls called frustules, which feature complex micro- and nano-structures that could be useful in various engineering applications.
- The study focuses on how nanoparticles (NPs) move within these frustules, using single particle tracking (SPT) to gather detailed motion data.
- Results show that NP movement is limited inside frustules, especially near the exit, and that there is a difference in diffusion patterns along different directions, highlighting the effectiveness of SPT in revealing these behaviors compared to traditional methods.
Porous materials are used in a variety of industrial applications owing to their large surface areas, large pore volumes, hierarchical porosities, and low densities. The motion of particles inside the pores of porous materials has attracted considerable attention. We investigated nano-particle motion in a porous material using the single-particle tracking method.
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