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Related Experiment Video

Updated: Mar 8, 2026

Preparation and Photoacoustic Analysis of Cellular Vehicles Containing Gold Nanorods
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Interactions and Attachment Pathways between Functionalized Gold Nanorods.

Shu Fen Tan1,2,3, Utkarsh Anand1,2,3,4, Utkur Mirsaidov1,2,3,4

  • 1Department of Physics, National University of Singapore , 117551 Singapore.

ACS Nano
|January 25, 2017
PubMed
Summary
This summary is machine-generated.

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This study reveals how gold nanorod self-assembly occurs via end-to-end or side-to-side attachment, controlled by linker concentration. Understanding these nanoparticle assembly dynamics is key for designing advanced nanostructures.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Chemistry

Background:

  • Nanoparticle (NP) self-assembly is crucial for creating ordered nanostructures.
  • The precise dynamics of NP assembly processes are not fully understood.

Purpose of the Study:

  • To investigate the assembly modes and dynamics of gold nanorods (Au NRs) in solution.
  • To elucidate the role of linker molecules and concentration in directing NP assembly.

Main Methods:

  • Utilized in situ liquid cell transmission electron microscopy (TEM).
  • Observed self-assembly of Au NRs mediated by cysteamine linkers.

Main Results:

  • Identified two distinct Au NR assembly modes: end-to-end at low linker concentration and side-to-side at high linker concentration.
Keywords:
in situ TEMintermolecular forceslinker-mediated assemblynanorodsself-assembly

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  • Discovered two pathways for side-to-side assembly: prealigned attachment and postattachment alignment.
  • Attributed assembly behaviors to linker distribution and electrostatic interactions.

    • Conclusions:

    • Nanoparticle shape and surface properties significantly influence self-assembly.
    • The findings provide insights into the intermediate steps of NP assembly.
    • This knowledge is vital for the rational design of hierarchical nanostructures.