Skip to main content

Anxiety determination by antibody-conjugated nanoparticles on an interdigitated electrode sensor

Abstract

This work focused on the detection of cortisol on an interdigitated electrode sensor surface using an anti-cortisol antibody. To improve immobilization, antibodies were conjugated with silver nanoparticles and attached to the surface of the sensor. Cortisol interacted in a dose-dependent manner on the antibody-immobilized sensor surface, and current changes were observed. Linear regression analysis was performed by a 3σ calculation, and the limit of detection fell into the range of 0.01 and 0.1 ng/mL. The sensitivity of cortisol was calculated to be 0.01 ng/mL and the sensor discriminated against other hormones, namely norepinephrine and progesterone, with higher selectivity for cortisol. This result represented the selective detection of cortisol with high performance, which can help to determine anxiety disorders.

This is a preview of subscription content, access via your institution.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6

References

Download references

Author information

Affiliations

Authors

Contributions

The authors are contributed to the preparation of the manuscript and discussion. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Jiexing Li.

Ethics declarations

Ethical statement

None.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Wang, X., Gopinath, S.C.B. & Li, J. Anxiety determination by antibody-conjugated nanoparticles on an interdigitated electrode sensor. 3 Biotech 10, 377 (2020). https://doi.org/10.1007/s13205-020-02370-7

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s13205-020-02370-7

Keywords

  • Anxiety
  • Cortisol
  • Electrochemical sensor
  • Nanomaterial
  • Silver nanoparticle