Surface–particle interactions control the escape time of a particle from a nanopore-gated nanocavity system: a coarse grained simulation

Zando, Robert; Chinappi, Mauro; Giordani, Cristiano; Cecconi, Fabio; Zhang, Zhen

doi:10.1039/d3nr01329d

Cited by 2 publications

(1 citation statement)

References 68 publications

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“…It is well-established that particle-surface forces can enhance or reduce the total diffusion current relative to Fick's law [11], via, e.g., electrostatic interactions [11][12][13][14][15][16][17], chemical adsorption and hydrodynamic hindrance [18][19][20][21][22], pore geometry [6,23], or, for instance, Taylor-Aris dispersion [24,25]. The monotonic relationship between particle current I and the pore area σ 0 , however, is preserved in all cases reported thus far.…”

Section: Introductionmentioning

confidence: 86%

Locally optimal geometry for surface-enhanced diffusion

Christensen,

Gupta,

Chen

et al. 2023

Phys. Rev. E

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Section: Introductionmentioning

confidence: 86%

Locally optimal geometry for surface-enhanced diffusion

Christensen,

Gupta,

Chen

et al. 2023

Phys. Rev. E

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Mean lifetime of diffusing particle in cylindrical cavity with absorbing spots of arbitrary radii on its bases

Dagdug,

Pompa-García,

Zitserman

2025

The Journal of Chemical Physics

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This paper deals with the trapping of a particle diffusing in a cylindrical cavity by two circular absorbing spots of arbitrary radii located in the centers of the cavity bases. The focus is on the mean particle lifetime, which is its mean first-passage time to one of the spots. When the spots are small and their radii are well below the cavity radius, this time can be analyzed using the narrow escape (NE) theory, which describes it as a function of the spot radii and the only parameter of the cavity, its volume, independent of the cavity shape and the particle initial position. We derive an approximate analytical solution for the mean particle lifetime that goes beyond the scope of the NE theory. In particular, our solution shows how this mean lifetime depends on the cavity shape, i.e., its length and radius, the particle initial position in the cavity, and the spot radii, which can be arbitrary. It reduces to the NE solution, as the spot radii tend to zero. To check the accuracy of our approximate result, we determine the mean lifetimes from three-dimensional Brownian dynamics simulations. The comparison shows excellent agreement between the theoretical predictions and simulation results when the initial distance from the particle to both cavity bases exceeds the cavity radius.

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Surface–particle interactions control the escape time of a particle from a nanopore-gated nanocavity system: a coarse grained simulation

Abstract: Nanopores and nanocavities are promising single molecule tools for investigating the behavior of individual molecules within confined spaces. For single molecule analysis, the total duration of time the analyte remains...

Cited by 2 publications

References 68 publications

Locally optimal geometry for surface-enhanced diffusion

Locally optimal geometry for surface-enhanced diffusion

Mean lifetime of diffusing particle in cylindrical cavity with absorbing spots of arbitrary radii on its bases

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