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Toward pH-controllable bioelectrocatalysis for hydrogen peroxide based on polymer brushes

2013; Elsevier BV; Volume: 29; Linguagem: Inglês

10.1016/j.elecom.2012.12.026

1873-1902

Tamara R.T.A. Antonio, Murilo F. Cabral, Ivana Cesarino, Sérgio Antônio Spínola Machado, Valber A. Pedrosa,

Analytical Chemistry and Sensors

In the present work, a biosensor was built with smart material based on polymer brushes. The biosensor demonstrated a pH-sensitive on–off property, and it was further used to control or modulate the electrochemical responses of the biosensor. This property could be used to realize pH-controlled electrochemical reaction of hydrogen peroxide and HRP immobilized on polymer brushes. The composite film also showed excellent amperometric i–t response toward hydrogen peroxide in the concentration range of 0–13 μM. In future, this platform might be used for self-regulating targeted diagnostic, drug delivery and biofuel cell based on controllable bioelectrocatalysis.