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Direct confinement of individual viruses within polyethylene glycol (PEG) nanowells
Kahp Y Suh1, Ali Khademhosseini, Sangyong Jon
1School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, Korea, and Harvard-MIT Division of Health Sciences and Technology, Brigham and Women's Hospital, Cambridge, Massachusetts 02139, USA.
Abstract:
Individual M13 viruses were spatially confined within wells fabricated from nanomolding of a PEG-based random copolymer. The viruses were selectively adhered to the region pretreated with an antibody against the virus, resulting in individual virus arrays. The polymer surface was found to be highly resistant to the attachment of the virus (approximately 0.02 microm-2), approximately 2 orders of magnitude lower than that on a bare silicon surface. The physical height of the template provided an additional barrier to the attachment of the virus due to entropic penalty in bending of a semi-flexible M13 virus. The effects of pattern size and barrier height were investigated, revealing that a certain critical height is needed to ensure successful confinement within the template for a given pattern size.
Insights
Researchers developed a new method using nanomolding to create individual virus arrays. This technique effectively confines M13 viruses, preventing non-specific attachment and enabling precise virus patterning.
Area of Science:
- Biotechnology
- Materials Science
- Nanotechnology
Background:
- Precise spatial arrangement of viruses is crucial for various biotechnological applications.
- Existing methods for virus immobilization often suffer from non-specific binding and low density.
Purpose of the Study:
- To develop a novel method for creating ordered arrays of individual M13 viruses.
- To investigate the effectiveness of a nanostructured polymer template in controlling virus confinement and attachment.
Main Methods:
- Fabrication of polymer wells using nanomolding of a PEG-based random copolymer.
- Selective pretreatment of well regions with antibodies for virus capture.
- Characterization of virus attachment resistance and the role of template physical height.
Main Results:
- Achieved highly resistant polymer surfaces with virus attachment densities 2 orders of magnitude lower than bare silicon.
- Demonstrated that template barrier height significantly contributes to virus confinement by imposing an entropic penalty.
- Identified critical template dimensions (pattern size and barrier height) for successful virus confinement.
Conclusions:
- Nanomolded polymer templates offer a robust platform for creating high-density, spatially defined individual virus arrays.
- The combination of selective antibody binding and physical template barriers effectively prevents non-specific virus attachment.
- This approach has significant potential for applications in biosensing, diagnostics, and nanotechnology.
