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Applied Nanoscience

, Volume 8, Issue 6, pp 1445–1452 | Cite as

Studies of mechanisms and characteristics of the fluorescence enhancement on anodic aluminum oxide thin film

  • Xiangchen Che
  • Pan Deng
  • Jiming Song
  • Long Que
Original Article
  • 3 Downloads

Abstract

Anodic aluminum oxide (AAO) thin film recently has been found as a new type of fluorescence enhancement nanomaterial. However, the mechanisms of the AAO thin film for the fluorescence enhancement have not been completely understood. Herein, the studies of its mechanisms are reported. Based on the experimental and modeling results, it has been found that the main contributing factor to the fluorescence enhancement is probably the plasmonic Al nanoparticles (NPs) embedded in the film, while the nanopore size and porosity of AAO thin film have a limited contribution. The characteristics of the enhancement have also been studied. It has been found that the enhancement is highly related to the gap between the fluorophore and the surface of the AAO thin film. Different excitation wavelength also results in different fluorescence enhancement. Using a simple model with a layer of Al NPs uniformly distributed in the thin film, the calculated enhancement factor of electric field and characteristics of the fluorescence enhancement match the experimental results.

Keywords

Anodic aluminum oxide Nanomaterials Plasmonics Fluorescence 

Notes

Acknowledgements

The effort was in part funded by NSF ECCS-0845370, EECS-1461841. The authors thank the technical supports from staffs at Microelectronics Research Center (MRC) at Iowa State University.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Electrical and Computer EngineeringIowa State UniversityAmesUSA

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