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Updated: Feb 10, 2026

Gold Nanoparticle Synthesis
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Sub-Angstrom Gold Nanoparticle/Liposome Interfaces Controlled by Halides.

Xiuru Liu1, Xiaoqiu Li2, Wu Xu1

  • 1School of Biological and Medical Engineering , Hefei University of Technology , Hefei , Anhui 230009 , China.

Langmuir : the ACS Journal of Surfaces and Colloids
|May 10, 2018
PubMed
Summary
This summary is machine-generated.

Halide-capped gold nanoparticles (AuNPs) interact with liposomes. Halide choice controls interaction strength, enabling precise control over nanoscale distances for materials science applications.

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Area of Science:

  • Nanoscience
  • Materials Science
  • Surface Chemistry

Background:

  • Nanoscience often studies size-dependent properties, typically optical.
  • Interactions at the sub-Angstrom level are crucial for understanding nanomaterial behavior.
  • Phosphocholine (PC) liposomes are relevant biological membrane models.

Purpose of the Study:

  • To investigate the interaction between halide-capped gold nanoparticles (AuNPs) and PC liposomes at the sub-Angstrom level.
  • To elucidate the role of different halides in modulating these interactions.
  • To explore the potential for controlling interparticle distances for applications in biosensing and surface science.

Main Methods:

  • Liposome leakage assay.
  • Differential scanning calorimetry.
  • Cryo-transmission electron microscopy (Cryo-TEM).

Main Results:

  • Halide-capped AuNPs adsorb to PC liposomes via van der Waals forces.
  • Iodide-capped AuNPs show weaker interaction than bromide- and chloride-capped AuNPs, attributed to larger ionic size.
  • Larger ligands blocked interaction, while noninteracting ions did not, confirming halide specificity.

Conclusions:

  • Halides on AuNPs can precisely control interparticle distances at the sub-Angstrom scale.
  • This control offers significant potential for surface probing and biosensor development.
  • The findings contribute to fundamental understanding of surface interactions in nanomaterials.