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Updated: Sep 23, 2025

Attaching Biological Probes to Silica Optical Biosensors Using Silane Coupling Agents

Attaching Biological Probes to Silica Optical Biosensors Using Silane Coupling Agents

Published on: May 1, 2012

The interaction between silica flat substrate and functional group-modified nanoparticles.

Xiaohan He¹, Luyu Deng¹, Liuyong Shi¹

¹Mechanical and Electrical Engineering College, Hainan University, Haikou, Hainan, P. R. China.

Electrophoresis

|May 17, 2022

Summary

This summary is machine-generated.

Functionalized nanoparticles interacting with silica surfaces are governed by ion concentration and surface charge. Understanding these interactions is key for nanoparticle movement in nanochannels.

Keywords:

charge density electric field energy density interaction nanoparticles silica flat substrate

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Last Updated: Sep 23, 2025

Attaching Biological Probes to Silica Optical Biosensors Using Silane Coupling Agents

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Published on: May 1, 2012

Preparation of Silica Nanoparticles Through Microwave-assisted Acid-catalysis

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Preparation of Functional Silica Using a Bioinspired Method

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Published on: August 1, 2018

Area of Science:

Nanotechnology
Surface Science
Physical Chemistry

Background:

Functionalized nanoparticles and nanodevices are increasingly studied, inspired by natural systems.
Understanding nanoparticle-surface interactions is crucial for applications in nanochannels and devices.

Purpose of the Study:

To theoretically investigate the interaction between polyelectrolyte brush-modified nanoparticles and a silica substrate.
To analyze the influence of multi-ion regulation on nanoparticle-surface interactions.

Main Methods:

Established a mathematical model based on the Poisson-Nernst-Planck equations.
Investigated changes in volume charge density and electric field energy density.

Main Results:

At close distances (2-5 nm), nanoparticle-silica interaction is influenced by solution cations and brush layer charge density.
At larger distances, brush layer volume charge density becomes the dominant regulatory factor.
Observed an isoelectric point shift influenced by the silica substrate and solution ions.

Conclusions:

The study provides insights into the complex interplay of forces governing nanoparticle behavior near silica surfaces.
Findings offer guidance for controlling functionalized nanoparticle movement within silica nanochannels.