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Updated: Jun 4, 2026
08:39
Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles
Published on: October 16, 2017
Charge-Energy Coupling Drives Ag6 Nanocluster-Amine Self-Assembly
Jian-Hua Yang1, Jia Deng1, Chuan-Shuai Dong1
1Key Laboratory of Heat and Mass Transfer and Low-Carbon Conversion, Ministry of Education, South China University of Technology, Guangzhou 510640, China.
The Journal of Physical Chemistry Letters
|June 3, 2026
Summary
Understanding charge-energy coupling in self-assembly is key for nanostructure design. This study reveals how pH and concentration control silver nanocluster (Ag6NCs) morphology transitions, enabling precise control.
Area of Science:
- Materials Science
- Nanotechnology
- Physical Chemistry
Background:
- The charge-energy coupling mechanism in solution self-assembly is poorly understood.
- This lack of understanding limits predictable nanostructure design and precise morphology control.
Purpose of the Study:
- To analyze continuous morphology transitions in a silver nanocluster (Ag6NCs)-octadecylamine (ODA) system.
- To establish a multiscale simulation framework for coupled pH and concentration regulation.
- To provide a mechanistic understanding of morphological evolution in complex self-assembly systems.
Main Methods:
- Developed a multiscale simulation framework.
- Constructed a two-dimensional concentration-pH phase diagram.
- Performed experimental validation using morphology characterization, DLS, PDI, and zeta potential analyses.
Main Results:
- Revealed continuous morphology evolution from clusters to fiber-like intermediates, porous lamellae, and large square lamellae.
- Demonstrated that concentration drives rearrangement via nonbond interaction energy, while pH influences the pathway through ionization and interfacial charge.
- Established a cross-scale link from molecular ionization to mesoscale morphology.
Conclusions:
- Validated simulations through comprehensive experiments.
- Supported a mechanism of local charge compensation-promoted rearrangement and interfacial reconstruction-enabled stabilization.
- Established a charge-energy coupling framework for understanding morphological evolution in self-assembly.
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