Related Experiment Video
Updated: Sep 24, 2025

Monitoring Protein Adsorption with Solid-state Nanopores
Published on: December 2, 2011
A glass nanopore ionic sensor for surface charge analysis
Songyue Chen1, Hong Chen2, Jian Zhang3
1Department of Mechanical and Electrical Engineering, Xiamen University Xiamen 361005 China s.chen@xmu.edu.cn.
Abstract:
Surface charge-based nanopore characterization techniques unfold unique properties and provide a powerful platform for a variety of sensing applications. In this paper, we have proposed a nanoconfined inner wall surface charge characterization method with glass nanopores. The glass nanopores were functionalized with DNA aptamers that were designed for mercury (Hg2+) ion immobilization by forming thymine-Hg2+-thymine structures. The surface charge of the nanopores was modulated by surface chemistry and Hg2+ ion concentrations and analysed by combining zeta potential measurements on glass slides and the ionic current rectification ratio of the nanopores. Also, 1 pM Hg2+ ions could be detected by the nanopores.

