| Title: |
Survival in a nanoforest of absorbing pillars |
| Authors: |
Grebenkov, Denis S; Skvortsov, Alexei T |
| Contributors: |
Alexander von Humboldt-Stiftung |
| Source: |
Journal of Physics A: Mathematical and Theoretical ; volume 56, issue 16, page 165002 ; ISSN 1751-8113 1751-8121 |
| Publisher Information: |
IOP Publishing |
| Publication Year: |
2023 |
| Description: |
We investigate the survival probability of a particle diffusing between two parallel reflecting planes toward a periodic array of absorbing pillars. We approximate the periodic cell of this system by a cylindrical tube containing a single pillar. Using a mode matching method, we obtain an exact solution of the modified Helmholtz equation in this domain that determines the Laplace transform of the survival probability and the associated distribution of first-passage times (FPTs). This solution reveals the respective roles of several geometric parameters: the height and radius of the pillar, the inter-pillar distance, and the distance between confining planes. This model allows us to explore different asymptotic regimes in the probability density of the FPT. In the practically relevant case of a large distance between confining planes, we argue that the mean FPT is much larger than the typical time and thus uninformative. We also illustrate the failure of the capacitance approximation for the principal eigenvalue of the Laplace operator. Some practical implications and future perspectives are discussed. |
| Document Type: |
article in journal/newspaper |
| Language: |
unknown |
| DOI: |
10.1088/1751-8121/acc3cf |
| DOI: |
10.1088/1751-8121/acc3cf/pdf |
| Availability: |
https://doi.org/10.1088/1751-8121/acc3cf; https://iopscience.iop.org/article/10.1088/1751-8121/acc3cf; https://iopscience.iop.org/article/10.1088/1751-8121/acc3cf/pdf |
| Rights: |
https://publishingsupport.iopscience.iop.org/iop-standard/v1 ; https://iopscience.iop.org/info/page/text-and-data-mining |
| Accession Number: |
edsbas.12E2EBE2 |
| Database: |
BASE |