Related Experiment Video
Updated: May 11, 2026
07:33
Tethered Bilayer Lipid Membranes to Monitor Heat Transfer between Gold Nanoparticles and Lipid Membranes
Published on: December 8, 2020
Effect of functionalized gold nanoparticles on floating lipid bilayers
Sabina Tatur1, Marco Maccarini, Robert Barker
1Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States. Sabina.Tatur@alumni.uni-heidelberg.de
Summary
Gold nanoparticles (AuNP) with cationic surfaces disrupt model cell membranes, while anionic surfaces offer protection. This research informs nanoparticle safety and design strategies.
Area of Science:
- Nanomaterials Science
- Biophysics
- Toxicology
Background:
- Nano-engineered materials offer biomedical potential but require safety assessments.
- Understanding nanoparticle-biomembrane interactions is crucial for risk evaluation and application development.
Purpose of the Study:
- To investigate the interaction of model lipid membranes with gold nanoparticles (AuNP) featuring different surface modifications.
- To elucidate the impact of surface charge on AuNP behavior and membrane integrity.
Main Methods:
- Neutron reflectometry experiments were conducted on zwitterionic lipid bilayers.
- AuNPs functionalized with cationic and anionic head groups were introduced to the model membranes.
Main Results:
- Cationic AuNPs penetrated the lipid bilayers' hydrophobic core, causing membrane disruption at higher concentrations.
- Anionic AuNPs did not penetrate the bilayers and appeared to protect against disruption at alkaline pH.
Conclusions:
- Surface charge significantly influences AuNP interaction with lipid membranes.
- Findings support surface charge evaluation for nanoparticle risk assessment and nano-safety design.
