Journal
LANGMUIR
Volume 34, Issue 44, Pages 13333-13338Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.8b02960
Keywords
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Funding
- NSF [1709827]
- NSF Graduate Research Fellowship Program [DGE-1321851]
- Catalysis Center for Energy Innovation, an Energy Frontier Research Cente - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001004]
- University of Pennsylvania's NSF MRSEC [DMR-112090]
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Nanoparticle (NP) stability is imperative for commercialization of nanotechnology. In this study, we compare the stability of Au NPs with surfaces functionalized with oleylamine, dodecanethiol, and two dendritic ligands of different generations. Dendrimer ligands provide a significant increase in the chemical stability of Au NPs when analyzed by cyanide-induced NP decomposition as well as an investigation into their colloidal stability at ambient conditions. These results were supported by absorption measurements, transmission electron microscopy, thermogravimetric analysis, nuclear magnetic resonance, and small-angle transmission X-ray scattering and show that dendrimers play a key role in improving the chemical and colloidal stability of NPs.
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