Electrochemical sensing of hydroxylamine by gold nanoparticles on single-walled carbon nanotube films
- Title
- Electrochemical sensing of hydroxylamine by gold nanoparticles on single-walled carbon nanotube films
- Author
- 성기훈
- Keywords
- Single-walled carbon nanotube; Electrochemical deposition; Gold nanoparticles; Hydroxylamine; Electrochemical detection
- Issue Date
- 2010-02
- Publisher
- ELSEVIER SCIENCE INC
- Citation
- ELECTROCHEMISTRY COMMUNICATIONS, v. 12, NO. 2, Page. 250-253
- Abstract
- The arrays of gold nanoparticles (AuNPs) were fabricated on flexible and transparent single-walled carbon nanotube (SWCNT) films using the electrochemical deposition method, and the patterned nanotubes were then used as electrodes for hydroxylamine detection. The sizes and densities of the AuNPs could easily be controlled by varying the amount of charge deposited, and the gold-deposited area showed a homogeneous distribution on the exposed SWCNT film surface. X-ray diffraction analysis of the AuNPs shows a face-centered cubic structure that is dominated by the lowest energy {111} facets. The oxidation of the hydroxylamine on the AuNP-deposited SWCNT films depended strongly on the solution pH, and the maximum catalytic current was observed at a pH of 9.0. A linear electrical response was observed for concentrations ranging from 0.016 to 0.210 mM, and the detection limit and the sensitivity were 0.72 mu M and 165.90 mu AmM-1 cm(-2), respectively. Moreover, the amperometric response in hydroxylamine showed a stable response for a long time (300 s), during which time it retained 94% of its initial value. In the long-term storage stability test, the current response to hydroxylamine decreased slightly, with only 17% leakage after 30 days. (C) 2009 Elsevier B.V. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S1388248109006006?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/183569
- ISSN
- 1388-2481;1873-1902
- DOI
- 10.1016/j.elecom.2009.12.006
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > BIONANO ENGINEERING(생명나노공학과) > Articles
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