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Updated: Mar 31, 2026
Monitoring Protein Adsorption with Solid-state Nanopores
Published on: December 2, 2011
Selective characterization of proteins on nanoscale concave surfaces
Xi Qian1, Utthara Rameshbabu2, Jonathan S Dordick3
1Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy NY 12180, USA; Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, NY 12180, USA; Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy NY 12180, USA.
Researchers developed a method to study proteins on the inside of hollow gold nanocages (AuNG). This technique selectively removes external proteins, enabling focused analysis of internal protein interactions on concave nanostructures.
Area of Science:
- Nanotechnology
- Biomaterials Science
- Surface Chemistry
Background:
- Nanoscale curvature significantly impacts biomolecule interactions.
- Understanding concave nanostructure-biomolecule interactions is limited due to coexisting convex surfaces.
- Selective study of proteins on concave surfaces of nanostructures is challenging.
Purpose of the Study:
- To develop a method for selective protein characterization on concave nanostructures.
- To enable discrete observation of proteins adsorbed inside hollow gold nanocages (AuNG).
- To investigate the role of nanoscale curvature in protein adsorption on internal concave surfaces.
Main Methods:
- Developed a facile method to desorb proteins from external surfaces of hollow gold nanocages (AuNG).
- Utilized variations in solution ionic strength to achieve selective protein desorption.
- Validated the method through computational analysis and comparison with non-hollow nanoparticles.
Main Results:
- Successfully achieved selective desorption of proteins from the external surfaces of AuNG.
- Enabled the characterization of proteins retained on the internal concave surfaces of AuNG.
- Demonstrated the efficacy of ionic strength manipulation for selective surface interaction studies.
Conclusions:
- The developed method provides a novel platform for studying proteins on internal concave nanostructures.
- This technique allows for the discrete observation of proteins adsorbed within AuNG hollow cores.
- The findings suggest expanded biomedical applications for hollow nanomaterials, particularly in understanding surface curvature effects.
