Citation: Xu Zhi Zhang, Kui Jiao. Aligned single-walled carbon nanotubes array electrode: Fabrication, characterization and application[J]. Chinese Chemical Letters, ;2009, 20(1): 76-78. doi: 10.1016/j.cclet.2008.09.007 shu

Aligned single-walled carbon nanotubes array electrode: Fabrication, characterization and application

Xu Zhi Zhang ,
Kui Jiao

College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

Received Date: 16 June 2008

Fund Project: The authors gratefully acknowledge financial supports from the National Science Foundation of China (No. 20635020, No. 20375020) and Doctoral Foundation of the Ministry of Education of China (No. 20060426001).

In the presence of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS),carboxylic group-functionalized single-walled carbon nanotubes (SWNTs) were assembled vertically on the glassy carbon electrode using ethylenediamine as linking agent to fabricate an aligned electrode (SWNTE). The morphological characteristic was studied with atomic force microscope (AFM) and its electrochemical property was investigated using K₃[Fe(CN)₆] as probe.ssDNA had a sensitive voltammetric response at the SWNTE and the oxidative peak potentials of guanine base and adenine base were 0.608 Vand 0.896 V, respectively. Under the optimal conditions, the DPV peak current of guanine base vs. the concentration of ssDNA was linear in the range of 5.4 μg/L-10.8 μg/L with a detection limit of 1 μg/L (S/N=3).
- Single-walled carbon nanotubes,
- Aligned electrode,
- DNA,
- Voltammetry
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