Journal
CHEMICAL SCIENCE
Volume 8, Issue 3, Pages 1854-1861Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6sc04582k
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Funding
- Science Fund for Creative Research Groups [21421004]
- 973 Program [2013CB733700, 2014CB748500]
- National Natural Science Foundation of China [21305045]
- Fundamental Research Funds for the Central Universities [222201313004]
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Single nanoparticle (NP) electrochemical measurements are widely described, both theoretically and experimentally, as they enable visualization of the electrochemical signal of a single NP that is masked in ensemble measurements. However, investigating the behavior of individual NPs using electrochemical signals remains a significant challenge. Here we report experiments and simulations demonstrating that multiple distinct motion trajectories could be discerned from time-resolved current traces by dynamic Monte Carlo simulations. We show that continuous monitoring and quantification of electrochemical oxidation of individual AgNPs using a low-noise electrochemical measurement platform produce significantly distinguished current traces due to the size-dependent motions of AgNPs. Our findings offer a view of the electrochemical signals of individual NPs that are largely different from that in the literature, and underscore the significance of motion behaviors in single NP electrochemistry.
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