Fabrication of Single Walled-Carbon Nanotubes Based pH Sensor Using Ultra-Precision Spray
The concentration of the hydroxyl radical is a critical parameter to be measured for monitoring the condition of aqueous biological species, or for predicting the path of chemical reactions. This paper describes a novel method for fabricating a very simple and fast response pH sensor compose of single walled-carbon nanotubes (SW-CNTs) using an ultra-precision spray. Such CNT-based sensor shows amperometric response in buffer solution at different hydroxyl radical concentrations and electrical conductance of SW-CNTs depends on the pH value. Our results suggest that sprayed CNT sensors are potential candidates as biosensors in future large-scale throughput devices.
Soon-Bok Lee and Yun-Jae Kim
J. H. Kwon et al., "Fabrication of Single Walled-Carbon Nanotubes Based pH Sensor Using Ultra-Precision Spray", Key Engineering Materials, Vols. 326-328, pp. 1479-1482, 2006