Wearable corneal biosensors fabricated from PEDOT functionalized sulfur-doped graphene for use in the early detection of myopia

Wenjing Zhang, Gongxian Dong, Haihua Feng, Suyan Shan, Libin Huang, Feng Yuan, Bijun Bao, Lu Yan, Zhaolin Xia, Tom Lawson, Jun Chen, Jia Qu*, Yong Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Myopia is an irreversible visual disorder. Its pathogenic mechanism is not completely determined. This lack of understanding has led to difficulties in its early detection and prevention. Herein, it is reported that the content of dopamine (DA) inside tears is related to myopia diopter. Changes in DA are detected by the use of a wearable corneal biosensor. The biosensor is prepared by electrodeposition of the enzyme tyrosinase and poly (3,4-ethylenedioxythiophene) functionalized sulfur-doped graphene onto a self-designed corneal microelectrode. This leads to a high-performance biosensor with a high sensitivity (of 12.9 µA × 10−3 m−1 cm−2), a good detection limit (of 101 × 10−9 m), excellent selectivity, and long-term stability. In vivo sensing tests on rabbits confirm a linear relationship between DA added to the animal eyes and the current response of the biosensor. Further tests on human tears sourced from defocus-induced myopia patients who have various myopia diopters show that the biosensor outputted a sensitive current signal that is related to the number of myopia diopters. This suggests there is an underlying relationship between myopia diopters and DA content in tears. It may provide a novel approach to a better understanding of myopia formation and its prevention.

Original languageEnglish
Article number2000682
Pages (from-to)1-7
Number of pages7
JournalAdvanced Materials Technologies
Volume5
Issue number12
DOIs
Publication statusPublished - Dec 2020

Keywords

  • dopamine (DA)
  • myopia
  • poly (3,4-ethylenedioxythiophene) (PEDOT)
  • sulfur-doped graphene
  • wearable corneal biosensors

Fingerprint Dive into the research topics of 'Wearable corneal biosensors fabricated from PEDOT functionalized sulfur-doped graphene for use in the early detection of myopia'. Together they form a unique fingerprint.

Cite this