Bienzymatic <i>Acetylcholinesterase</i> and <i>Choline Oxidase</i> Immobilized Biosensor Based on a Phenyl Carboxylic Acid-Grafted Multiwalled Carbon Nanotube

<table>SEM images of the bare SPE (a), MWNT-modified SPE (b), COOH-modified SPE (c), and AChE-ChOx-modified SPE (d).</table>

Advances in Materials Science and Engineering

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Figure 4

Figure 4: Bienzymatic <i>Acetylcholinesterase</i> and <i>Choline Oxidase</i> Immobilized Biosensor Based on a Phenyl Carboxylic Acid-Grafted Multiwalled Carbon Nanotube 

Figure 4 | Bienzymatic Acetylcholinesterase and Choline Oxidase Immobilized Biosensor Based on a Phenyl Carboxylic Acid-Grafted Multiwalled Carbon Nanotube 