Journal
CURRENT APPLIED PHYSICS
Volume 9, Issue 4, Pages E218-E221Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cap.2009.06.022
Keywords
pH sensor; Pd pattern; Electrolysis method; Hydrogen sensor; pH buffer solution
Funding
- Agency for Defense Development through the Defense Nano Technology Application Center
- KOSEF through the National Core Research Center for Nanomedical Technology [R15-2004-024-00000-0]
- Basic Research Program [R01-2008-000-21078-0]
- Seoul Research and Business Development Program [10816]
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We report a novel low-cost and simple technique to fabricate micron-scaled pH sensors using Pd patterned structures. We utilized a combination of photolithography and a lift-off technique to fabricate a V-shaped 4-probe device from a continuous Pd film. The device could detect the pH of a buffer solution by electrolysis. The hydrogen gas (H-2) in the solution generated during electrolysis was sensed by the Pd structure. Our results demonstrate that micron-scaled pH sensors based on V-shaped Pd structures can be used to quantitatively detect the pH of a wide pH range of buffer solutions. (C) 2009 Elsevier B.V. All rights reserved.
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