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Updated: May 9, 2026

Visualizing Diffusional Dynamics of Gold Nanorods on Cell Membrane using Single Nanoparticle Darkfield Microscopy
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Simulation study on gold nanoparticle-cellular membrane complex in endocytosis process.

Fengxian Zheng1, Jun Pan, Xiaohui Yin

  • 1Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China.

Journal of Nanoscience and Nanotechnology
|July 19, 2013
PubMed
Summary
This summary is machine-generated.

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Gold nanoparticles (AuNPs) interact with cell membranes, adhering to the surface and forming complexes with lipids. Larger AuNPs cause greater membrane deformation, impacting lipid fluidity and offering insights into cellular uptake.

Area of Science:

  • Biophysics
  • Nanotechnology
  • Cell Biology

Background:

  • Gold nanoparticles (AuNPs) are crucial in biomedicine, particularly as drug delivery vectors.
  • Understanding AuNP interactions with cell membranes is vital for their safe and effective application.

Purpose of the Study:

  • To investigate the interaction dynamics between gold nanoparticles (AuNPs) and a dipalmitoylphosphatidylcholine (DMPC) lipid bilayer using molecular dynamics simulations.
  • To elucidate the energetic landscape and structural consequences of AuNP insertion into the cell membrane.

Main Methods:

  • All-atom molecular dynamic simulations were employed to model AuNP-DMPC bilayer interactions.
  • Potential of Mean Force (PMF) calculations were performed to quantify the energy barrier for AuNP translocation.

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Last Updated: May 9, 2026

Visualizing Diffusional Dynamics of Gold Nanorods on Cell Membrane using Single Nanoparticle Darkfield Microscopy
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Nanogold Labeling of the Yeast Endosomal System for Ultrastructural Analyses
09:49

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  • Analysis of lipid dynamics, bilayer deformation, and nanoparticle-membrane complex formation.

    • Main Results:

    • AuNPs spontaneously adhered to the DMPC bilayer surface, driven by headgroup attraction.
    • A significant energy barrier was observed for AuNP insertion into the hydrophobic core.
    • AuNP presence induced local bilayer deformation and reduced lipid fluidity, with effects intensifying with larger AuNP size.
    • Formation of nanoparticle-membrane complexes, where lipids moved collectively with the AuNP at reduced speeds.

    Conclusions:

    • The study reveals key mechanisms governing AuNP-membrane interactions, including surface adhesion and insertion barriers.
    • The formation of nanoparticle-membrane complexes provides insights into potential endocytosis pathways for AuNP translocation.
    • Findings contribute to a deeper understanding of nanoparticle behavior at the cellular level, crucial for nanomedicine development.