A smartphone based surface plasmon resonance imaging (SPRi) platform for on-site biodetection

Creative Commons License

Guner H., Ozgur E., Kokturk G., Celik M., Esen E., Topal A. E., ...More

SENSORS AND ACTUATORS B-CHEMICAL, vol.239, pp.571-577, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 239
  • Publication Date: 2017
  • Doi Number: 10.1016/j.snb.2016.08.061
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.571-577
  • Keywords: Plasmonics, Surface plasmon resonance imaging, Optical discs, Mobile sensing, Biosensors, Optical sensor, GAS-DETECTION, CELL PHONE, BIOSENSOR, FILMS, SENSORS, LAYER
  • Middle East Technical University Affiliated: Yes


We demonstrate a surface plasmon resonance imaging platform integrated with a smartphone to be used in the field with high-throughput biodetection. Inexpensive and disposable SPR substrates are produced by metal coating of commercial Blu-ray discs. A compact imaging apparatus is fabricated using a 3D printer which allows taking SPR measurements from more than 20.000 individual pixels. Real-time bulk refractive index change measurements yield noise equivalent refractive index changes as low as 4.12 x 10(-5) RIU which is comparable with the detection performance of commercial instruments. As a demonstration of a biological assay, we have shown capture of mouse IgG antibodies by immobilized layer of rabbit anti-mouse (RAM) IgG antibody with nanomolar level limit of detection. Our approach in miniaturization of SPR biosensing in a cost-effective manner could enable realization of portable SPR measurement systems and kits for point-of-care applications. (C) 2016 Published by Elsevier B.V.