Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 52, Pages 23445-23449Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202010675
Keywords
acute neuroinflammatory response; antifouling; biointerfacing; in vivo analysis; polydopamine
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Funding
- National Key Research and Development Project [2018YFE0200800]
- National Natural Science Foundation of China [21874152, 21790390, 21790391, 21874139]
- Chinese Academy of Sciences [QYZDJ-SSW-SLH030]
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Electrochemical sensing performance is often compromised by electrode biofouling (e.g., proteins nonspecific binding) in complex biological fluids; however, the design and construction of a robust biointerface remains a great challenge. Herein, inspired by nature, we demonstrate a robust polydopamine-engineered biointerfacing, to tailing zwitterionic molecules (i.e., sulfobetaine methacrylate, SBMA) through Michael Addition. The SBMA-PDA biointerface can resist proteins nonspecific binding in complex biological fluids while enhancing interfacial electron transfer and electrochemical stability of the electrode. In addition, this sensing interface can be integrated with tissue-implantable electrode for in vivo analysis with improved sensing performance, preserving ca. 92.0% of the initial sensitivity after 2 h of implantation in brain tissue, showing low acute neuroinflammatory responses and good stability both in normal and in Parkinson ' s disease (PD) rat brain tissue.
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