Anomalous growth of the depletion zone in the photobleaching trapping reaction

Sung Hyun Park; Hailin Peng; Raoul Kopelman; Panos Argyrakis; Haim Taitelbaum

doi:10.1103/PhysRevE.67.060103

Rapid Communication

Anomalous growth of the depletion zone in the photobleaching trapping reaction

Sung Hyun Park, Hailin Peng, Raoul Kopelman, Panos Argyrakis, and Haim Taitelbaum

Phys. Rev. E 67, 060103(R) – Published 20 June 2003

Abstract

We study the anomalous growth of the depletion zone at a single trap, as observed in a photobleaching trapping reaction in confined geometry. We provide experimental evidence for a nonuniversal growth of this depletion. We also find an early-time behavior of the depletion zone, owing to the finite size of the trap. Various laser powers are used in order to study the effects of trapping strength, interpreted theoretically in terms of an imperfect trap. The results are supported by numerical calculations. Comparison with other trapping reactions provides insight into finite-size traps.