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Related Experiment Video

Updated: Apr 23, 2026

Preparation and Photoacoustic Analysis of Cellular Vehicles Containing Gold Nanorods
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Citrate-stabilized gold nanorods.

Jonathan G Mehtala1, Dmitry Y Zemlyanov, Joann P Max

  • 1Department of Chemistry, Purdue University , 560 Oval Drive, West Lafayette, Indiana 47907-2084, United States.

Langmuir : the ACS Journal of Surfaces and Colloids
|September 26, 2014
PubMed
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Stable gold nanorods (GNRs) were created using a scalable surfactant exchange method. This process ensures long-term dispersion stability for advanced nanorod research and applications.

Area of Science:

  • Nanotechnology
  • Materials Science
  • Surface Chemistry

Background:

  • Gold nanorods (GNRs) are versatile nanomaterials with applications in optics and medicine.
  • Stabilizing GNRs in aqueous solutions is crucial for their practical use.
  • Current stabilization methods can limit further functionalization.

Purpose of the Study:

  • To develop a scalable and reliable method for preparing stable aqueous dispersions of citrate-stabilized gold nanorods (cit-GNRs).
  • To investigate the surfactant exchange process for GNR stabilization.
  • To enable systematic studies on ligand structure effects on GNR properties.

Main Methods:

  • Surfactant exchange from CTAB-stabilized GNRs to PSS-stabilized GNRs, followed by citrate stabilization.
  • Monitoring the exchange process using infrared spectroscopy, surface-enhanced Raman scattering (SERS), and X-ray photoelectron spectroscopy (XPS).

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Last Updated: Apr 23, 2026

Preparation and Photoacoustic Analysis of Cellular Vehicles Containing Gold Nanorods
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Hydroquinone Based Synthesis of Gold Nanorods
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Main Results:

  • Successfully prepared stable aqueous dispersions of cit-GNRs through a scalable surfactant exchange process.
  • Confirmed quantitative displacement of surfactants (CTAB and PSS) using XPS.
  • Demonstrated indefinite stability of cit-GNRs at low ionic strength.

Conclusions:

  • The developed method provides a reliable route to stable cit-GNR dispersions.
  • The cit-GNRs are suitable for further ligand exchange without compromising stability.
  • This work facilitates detailed analysis of ligand effects on GNR hydrodynamic size.