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Updated: Sep 26, 2025

Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution

Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution

Published on: August 16, 2016

Profiling single-molecule reaction kinetics under nanopore confinement.

Wei Liu¹, Zhong-Lin Yang¹, Chao-Nan Yang¹

¹State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China yilunying@nju.edu.cn.

Chemical Science

|April 20, 2022

Summary

This summary is machine-generated.

We developed a nanopore reactor to study single-molecule reaction kinetics under nanoconfinement. A new four-state model reveals how reactant capture and collision frequency influence reaction pathways in confined spaces.

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Area of Science:

Chemical kinetics
Nanotechnology
Single-molecule analysis

Background:

Understanding single-molecule reaction kinetics under nanoconfinement is crucial for elucidating reactive intermediates and pathways.
Existing kinetics models struggle to accurately describe reactions within confined environments.

Purpose of the Study:

To engineer a novel aerolysin nanopore reactor for detailed study of single-molecule reaction kinetics under nanoconfinement.
To propose and validate a new kinetics model for reactions occurring within nanopores.

Main Methods:

Utilized an aerolysin nanopore reactor to create a nanoconfined environment for single-molecule reactions.
Directly identified bond-forming and non-bond-forming events to characterize reaction dynamics.
Developed a four-state kinetics model based on observed molecular events.

Main Results:

Successfully engineered a nanopore reactor capable of studying single-molecule reaction kinetics.
Proposed a novel four-state kinetics model for reactions under nanoconfinement.
Demonstrated that reaction kinetics are dependent on reactant capture frequency and effective collision fraction within the nanopore.

Conclusions:

The proposed four-state model provides the first detailed kinetics description for single-molecule reactions in nanopores.
Insights gained will guide the design of future confined nanopore reactors for chemical analysis.
This work enhances mechanistic understanding of dynamic covalent chemistry in confined systems like cages and micelles.