Ultrasensitive on-chip immunoassays with a nanoparticle-assembled photonic crystal

Jin Hee Han, L. Sudheendra, Hee Joo Kim, Shirley J. Gee, Bruce D. Hammock, Ian M. Kennedy

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Electrophoretic particle entrapment system (EPES) is employed to generate 2D array of nanoparticles coated with biological molecules (i.e., antibodies). Phase matching of the excitation and the emission in the 2D arrays with particles produces a highly enhanced fluorescence signal that was shown to improve the limit of detection in immunoassays. The phase matching is achieved when the particle are in the sub-100 nm range. A comparison between different size particles shows that the sensitivity of an immunoassay is extended to a range that is difficult to achieve with standard technology (e.g., enzyme-linked immunosorbent assay-ELISA). The effectiveness of this novel configuration of particle-in-a-well was demonstrated with an assay for human epidermal growth factor receptor 2 (HER2; breast cancer biomarker), with a detection limit as low as 10 attomolar (aM) in less than 10 μL of serum-based sample. The limit of detection of HER2 indicated far superior assay performance compared to the corresponding standard 96-well plate-based ELISA. The particle-based photonic platform reduces the reagent volume and the time for performing an assay in comparison to competing methods. The simplicity of operation and the level of sensitivity demonstrated here can be used for rapid and early stage detection of biomarkers.

Original languageEnglish (US)
Pages (from-to)8570-8582
Number of pages13
JournalACS Nano
Volume6
Issue number10
DOIs
StatePublished - Oct 23 2012

Fingerprint

immunoassay
Photonic crystals
Assays
chips
photonics
Nanoparticles
nanoparticles
Phase matching
crystals
biomarkers
phase matching
Immunosorbents
Biomarkers
Tumor Biomarkers
Antibodies
Photonics
entrapment
Enzymes
Fluorescence
sensitivity

Keywords

  • electrophoretic particle entrapment system(EPES)
  • human epidermal growth factor receptor 2 (HER2)
  • immunoassay
  • nanoarray
  • nanoparticles

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Han, J. H., Sudheendra, L., Kim, H. J., Gee, S. J., Hammock, B. D., & Kennedy, I. M. (2012). Ultrasensitive on-chip immunoassays with a nanoparticle-assembled photonic crystal. ACS Nano, 6(10), 8570-8582. https://doi.org/10.1021/nn301656c

Ultrasensitive on-chip immunoassays with a nanoparticle-assembled photonic crystal. / Han, Jin Hee; Sudheendra, L.; Kim, Hee Joo; Gee, Shirley J.; Hammock, Bruce D.; Kennedy, Ian M.

In: ACS Nano, Vol. 6, No. 10, 23.10.2012, p. 8570-8582.

Research output: Contribution to journalArticle

Han, JH, Sudheendra, L, Kim, HJ, Gee, SJ, Hammock, BD & Kennedy, IM 2012, 'Ultrasensitive on-chip immunoassays with a nanoparticle-assembled photonic crystal', ACS Nano, vol. 6, no. 10, pp. 8570-8582. https://doi.org/10.1021/nn301656c
Han JH, Sudheendra L, Kim HJ, Gee SJ, Hammock BD, Kennedy IM. Ultrasensitive on-chip immunoassays with a nanoparticle-assembled photonic crystal. ACS Nano. 2012 Oct 23;6(10):8570-8582. https://doi.org/10.1021/nn301656c
Han, Jin Hee ; Sudheendra, L. ; Kim, Hee Joo ; Gee, Shirley J. ; Hammock, Bruce D. ; Kennedy, Ian M. / Ultrasensitive on-chip immunoassays with a nanoparticle-assembled photonic crystal. In: ACS Nano. 2012 ; Vol. 6, No. 10. pp. 8570-8582.
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