Fabrication of single walled-carbon nanotubes based pH sensor using ultra-precision spray

Jae Hong Kwon, Kyong Soo Lee, Byeong Kwon Ju

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)1479-1482
Number of pages4
JournalKey Engineering Materials
Volume326-328 II
Publication statusPublished - 2006


  • Electrochemical sensor
  • Hydroxyl radical
  • PH
  • Single walled-carbon nanotube
  • Ultraprecision spray

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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