Diffusion within pores fully revealed by magnetic resonance

TL;DR

This paper introduces a magnetic resonance technique using specialized gradient pulses to fully characterize fluid diffusion within pores, revealing pore shape and internal dynamics with high sensitivity.

Contribution

The study presents a novel magnetic resonance method for complete diffusion propagator measurement, enabling detailed pore structure and diffusion dynamics analysis.

Findings

Successful measurement of diffusion propagator in pores

Determination of pore shape and internal diffusion dynamics

Enhanced understanding of confined fluid transport

Abstract

Probing the transport of fluids within confined domains is important in many areas including material science, catalysis, food science, and cell biology. The diffusion propagator fully characterizes the diffusion process, which is highly sensitive to the confining boundaries as well as the structure within enclosed pores. While magnetic resonance has been used extensively to observe various features of the diffusion process, its full characterization has been elusive. Here, we address this challenge by employing a special sequence of magnetic field gradient pulses for measuring the diffusion propagator, which allows for `listening to the drum' and determining not only the pore's shape but also diffusive dynamics within it.