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Single elementary charge fluctuations on nanoparticles in aqueous solution

Yera Ussembayev (UGent) , Filip Beunis (UGent) , Lucas Oorlynck (UGent) , Mohammadreza Bahrami (UGent) , Filip Strubbe (UGent) and Kristiaan Neyts (UGent)
(2023) ACS NANO. 17(22). p.22952-22959
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Abstract
100 years ago, in 1923, the Nobel prize in physics was awarded for measurement of the unit charge. In addition to a profound impact on contemporary physics, this discovery has reshaped our understanding of charge-based interactions in chemistry and biology, ranging from oxidation and ionization to protein folding and metabolism. In a liquid, the discrete nature of the electric charge becomes prominent at the nanoscale when a charge carrier is exchanged between a molecule or a nanoparticle and the surrounding medium. However, our ability to observe the dynamics of such interactions at the level of a single elementary charge is limited due to the abundance of ions in water. Here, we report on the observation of single binding–unbinding events with elementary charge resolution at the surface of a nanoparticle suspended in water. Discrete steps in the electrical charge are revealed by analyzing the motion of optically trapped nanoparticles under the influence of an applied sinusoidal electric field. The measurements are sufficiently fast and long to observe individual (dis)charging events that occur on average every 3 s. Our results offer prospective routes for studying the dynamics of diverse chemical and biological phenomena on the nanoscale with elementary charge resolution.
Keywords
single elementary charge, nanoparticles, surfacecharge, optical, trapping, electrophoresis, PROTEIN, MECHANISMS, BINDING, OBJECTS, SIZE

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Citation

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MLA
Ussembayev, Yera, et al. “Single Elementary Charge Fluctuations on Nanoparticles in Aqueous Solution.” ACS NANO, vol. 17, no. 22, 2023, pp. 22952–59, doi:10.1021/acsnano.3c08161.
APA
Ussembayev, Y., Beunis, F., Oorlynck, L., Bahrami, M., Strubbe, F., & Neyts, K. (2023). Single elementary charge fluctuations on nanoparticles in aqueous solution. ACS NANO, 17(22), 22952–22959. https://doi.org/10.1021/acsnano.3c08161
Chicago author-date
Ussembayev, Yera, Filip Beunis, Lucas Oorlynck, Mohammadreza Bahrami, Filip Strubbe, and Kristiaan Neyts. 2023. “Single Elementary Charge Fluctuations on Nanoparticles in Aqueous Solution.” ACS NANO 17 (22): 22952–59. https://doi.org/10.1021/acsnano.3c08161.
Chicago author-date (all authors)
Ussembayev, Yera, Filip Beunis, Lucas Oorlynck, Mohammadreza Bahrami, Filip Strubbe, and Kristiaan Neyts. 2023. “Single Elementary Charge Fluctuations on Nanoparticles in Aqueous Solution.” ACS NANO 17 (22): 22952–22959. doi:10.1021/acsnano.3c08161.
Vancouver
1.
Ussembayev Y, Beunis F, Oorlynck L, Bahrami M, Strubbe F, Neyts K. Single elementary charge fluctuations on nanoparticles in aqueous solution. ACS NANO. 2023;17(22):22952–9.
IEEE
[1]
Y. Ussembayev, F. Beunis, L. Oorlynck, M. Bahrami, F. Strubbe, and K. Neyts, “Single elementary charge fluctuations on nanoparticles in aqueous solution,” ACS NANO, vol. 17, no. 22, pp. 22952–22959, 2023.
@article{01HBTNK3MFK3VXTW5QQWD2XM7Z,
  abstract     = {{100 years ago, in 1923, the Nobel prize in physics was awarded for measurement of the unit charge. In addition to a profound impact on contemporary physics, this discovery has reshaped our understanding of charge-based interactions in chemistry and biology, ranging from oxidation and ionization to protein folding and metabolism. In a liquid, the discrete nature of the electric charge becomes prominent at the nanoscale when a charge carrier is exchanged between a molecule or a nanoparticle and the surrounding medium. However, our ability to observe the dynamics of such interactions at the level of a single elementary charge is limited due to the abundance of ions in water. Here, we report on the observation of single binding–unbinding events with elementary charge resolution at the surface of a nanoparticle suspended in water. Discrete steps in the electrical charge are revealed by analyzing the motion of optically trapped nanoparticles under the influence of an applied sinusoidal electric field. The measurements are sufficiently fast and long to observe individual (dis)charging events that occur on average every 3 s. Our results offer prospective routes for studying the dynamics of diverse chemical and biological phenomena on the nanoscale with elementary charge resolution.}},
  author       = {{Ussembayev, Yera and Beunis, Filip and Oorlynck, Lucas and Bahrami, Mohammadreza and Strubbe, Filip and Neyts, Kristiaan}},
  issn         = {{1936-0851}},
  journal      = {{ACS NANO}},
  keywords     = {{single elementary charge,nanoparticles,surfacecharge,optical,trapping,electrophoresis,PROTEIN,MECHANISMS,BINDING,OBJECTS,SIZE}},
  language     = {{eng}},
  number       = {{22}},
  pages        = {{22952--22959}},
  title        = {{Single elementary charge fluctuations on nanoparticles in aqueous solution}},
  url          = {{http://doi.org/10.1021/acsnano.3c08161}},
  volume       = {{17}},
  year         = {{2023}},
}
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