An organic semiconductor laser based on star-shaped truxene-core oligomers for refractive index sensing

A. -M. Haughey, B. Guilhabert, A. L. Kanibolotsky, P. J. Skabara, G. A. Burley, M. D. Dawson, N. Laurand

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The sensing capabilities of an all-organic semiconductor distributed feedback laser based on star-shaped truxene-core molecules are described. Two assays are presented as a proof-of-principle demonstration. In the first, concentration changes in the range of 5-60% (v/v) glycerol solution in water were measured with a bulk detection sensitivity of 21 nm per refractive index unit. Secondly, layer-by-layer adsorption of polyelectrolytes to the laser surface, up to a thickness of ≈45 nm, was measured. The experimental results from both assays are compared to, and shown to agree with, a theoretical model. Organic semiconductor lasers of this type have a number of attractions including ease of large-scale fabrication, incorporation into existing assay equipment and no rigid optical alignment constraints for excitation and collection of emission, which makes them well-suited to sensing applications. Therefore, it is expected that this technology will be useful in biosensing applications where label-free samples are investigated.
Original languageEnglish
Pages (from-to)132-139
Number of pages8
JournalSensors and Actuators B: Chemical
Volume185
DOIs
Publication statusPublished - Aug 2013

Keywords

  • thin-films
  • sensitivity
  • polymers
  • laser
  • biosensors
  • semiconductor
  • plastic
  • distributed-feedback
  • neutron
  • truxene
  • sensor
  • integrated optics
  • organic
  • organic semiconductor laser
  • star-shaped truxene-core oligomers
  • refractive index sensing

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