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Ultrafiltration membrane for electrophoretic capturing of pathogens for AFM imaging
Victor N Morozov1, Melissa Evanskey, Yian Kim Tan
1National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, Virginia 20110, USA. vmorozov@gmu.edu
Langmuir : the ACS Journal of Surfaces and Colloids
|February 8, 2006
Summary
This study presents a new method for capturing pathogens like viruses and phages using electrophoretic techniques on ultrafiltration membranes. This rapid technique enhances pathogen detection and analysis on nanoscale surfaces.
Area of Science:
- Biotechnology
- Nanotechnology
- Analytical Chemistry
Background:
- Pathogen detection and capture are crucial for diagnostics and research.
- Existing methods may lack speed, sensitivity, or nanoscale surface control.
- Ultrafiltration membranes offer potential for pathogen capture but require surface modification.
Purpose of the Study:
- To develop a simple and rapid technique for electrophoretically assisted capture of pathogens.
- To characterize the nanoscale surface properties of modified ultrafiltration membranes.
- To demonstrate the effectiveness of the method for capturing small viral particles.
Main Methods:
- Coating commercial dialysis membranes with cross-linked dextran or globular proteins.
- Activating the membrane surface using cold plasma for enhanced coating adherence.
- Utilizing atomic force microscopy (AFM) to assess nanoscale surface roughness.
- Employing electrophoretic capture of viral particles from suspension.
Main Results:
- Achieved nanoscale smooth surfaces with root-mean-square roughness below 1 nm.
- Successfully captured small viral particles (fd phages) using the electrophoretic technique.
- Demonstrated capture from suspensions as low as 1 x 10(6) particles/mL.
- Visualized captured particles effectively using AFM.
Conclusions:
- The developed technique provides a simple, rapid, and sensitive method for pathogen capture.
- Electrophoretic assistance on nanoscale smooth membranes is effective for viral particle concentration.
- This method has potential applications in pathogen detection, diagnostics, and sample preparation.