Journal
PHYSICAL REVIEW E
Volume 83, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.83.061405
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Funding
- National Science Foundation [ECS-0335765]
- NSF-NIRT [CBET 0609062]
- NSF-NBIC [NSF NSEC DMR-0425780]
- Nanotechnology Institute of Ben Franklin Technology Partners of Southeastern Pennsylvania
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We report on real-time observations of the aggregation of gold nanoparticles using a custom-made liquid cell that allows for in situ electron microscopy. Process kinetics and fractal dimension of the aggregates are consistent with three-dimensional cluster-cluster diffusion-limited aggregation, even for large aggregates, for which confinement effects are expected. This apparent paradox was resolved through in situ observations of the interactions between individual particles as well as clusters at various stages of the aggregation process that yielded the large aggregates. The liquid cell described herein facilitates real-time observations of various processes in liquid media with the high resolution of the electron microscope.
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