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11
Carbon Nanotube–Based Electrochemical Biosensors
Feng Du, Lin Zhu, and Liming Dai
11.1 Introduction
Owing to the large specic surface area as well as unusual electrical, thermal, and
mechanical properties [1–3], carbon nanotubes are useful for various measurement
devices, including electrochemical biosensors. However, it is essential to align and/or
pattern the carbon nanotubes for device fabrication. In this regard, various carbon nano-
tubes (both multiwalled and single-walled carbon nanotubes, MWNTs and SWNTs) have
been made either perpendicularly or horizontally aligned to the substrate surface, along
with micropatterned carbon nanot